This standard specifies the definition and method of abrasive blast cleaning of steel surface treatment methods before coating, the abrasives used and the process procedures. This standard applies to the cleaning of new and corroded steel surfaces that have not been coated or have been coated. GB/T 18839.2-2002 Surface treatment of steel before coating Surface treatment methods Abrasive blast cleaning GB/T18839.2-2002 Standard download decompression password: www.bzxz.net
This standard specifies the definition and method of abrasive blast cleaning of steel surface treatment methods before coating, the abrasives used and the process procedures. This standard applies to the cleaning of new and corroded steel surfaces that have not been coated or have been coated.

IC:S._25. 220. 10
National Standard of the People's Republic of China
GB/T18839.2—2002
eqvIs08504-2.2000
Surface treatment of steel substrates before application of paintsand related products -- Surface preparation methodsAbrasive blast-cleaning
Published on September 13, 2002
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of Chinawww.bzxz.net
Implemented on March 1, 2003
GB/T 18839. This standard is based on ISO 8504-2:2000 Surface preparation of steel materials before coating - Surface preparation methods - Abrasive blast cleaning. It is equivalent to the international standard in terms of technical content. This standard adds the introduction of ISO 8504-2 and adds: This standard specifies the abrasive blast cleaning method. It should be used together with GB/T 18839.1-20020 General principles for surface treatment of steel materials before coating (eg IS18504-1:2000). This standard contains appendix A and closing notes for reference only. This standard was proposed by China Shipbuilding Industry Corporation and is under the jurisdiction of the 11th Research Institute of China Shipbuilding Industry. The original author of this standard is China Shipbuilding Industry 11th Research Institute. The original author of this standard is Jianhua and An Yinhua. Surface
GB/T 18839.2—2002
ISO (formerly ISO) International Standard Organization! (ISO) is a worldwide federation of national standards bodies (ISO member bodies). The work of formulating international standards is carried out by ISO technical committees. Each member body interested in the subject covered by a technical committee has the right to participate in that technical committee. International organizations, governmental or non-governmental, in liaison with ISO, may also participate in this work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all aspects of technical standardization of electrical equipment. International Standards adopted by the technical committees shall be circulated to the member bodies for voting before being approved as international standards by the ISO Council. According to the ISO standard-setting procedure, an international standard shall become an international standard if at least 75% of the member bodies vote in favor. International standards shall be formulated in accordance with Part 3 of the ISO/IEC Directives. Note that some of the contents of this part of ISO 8504 may be subject to patents. ISO shall not be held responsible for proving any or all such patent rights. This International Standard ISO 8504-2:2000 was prepared by ISO/TC 35/SC 12 Technical Committee on Paints and Varnishes, Subcommittee on Surface Treatment of Steel Materials Before Paint Removal. This version of the standard has been revised and editorially reviewed in due course, and cancels and replaces the previous version (ISO 8504-2:992).
ISO8504 consists of the following parts under the general title: Surface preparation of steel materials before coating - Surface preparation methods: Part 1: General
Part 2: Abrasive blast cleaning
Part 3: Cleaning by hand and by power tools
Some other parts are in planning
The appendix A of this standard is an informative appendix.
1 Scope
National Standard of the People's Republic of China
Surface preparation of steel substrates before application of paints
Surface preparation methods
Abrasive blast cleaning
Preparalion of steel substrates before application of paintsand related prndueisSurface preparation methods-Abrasive blasl-cleaning
GB/T 18839. 22002
eqv IS0 8504-2:2000
This standard specifies the definition and methods, abrasives and process procedures of abrasive blast cleaning of steel substrates before application of paints.
This standard is applicable to the cleaning of new and etched surfaces of uncoated or coated materials. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When the technical standards were published, the versions shown were valid. All standards are subject to revision and parties using non-standards should explore the possibility of using the most recent versions of the following standards. GI3/T8923--1988 Rust grade and rust removal grade of steel surface before painting (er1JS8501-1:1988) GB/T17849--1999 Surface treatment of steel before coating - Test method for blast cleaning with non-metallic abrasives (eq1S0) [1127:1993]
GB/I18570.2-2001 Surface treatment of steel before coating - Test method for determination of surface cleanliness, laboratory determination of new chemical on cleaned steel surface (eV1S8602-2:1992) (GB/T18839.1--2002 Surface treatment of steel before derusting - General principles for surface treatment methods (egvIS()8501120c0) GB/T18835.3-2002 Surface treatment of steel before coating - Surface treatment methods - Manual and power tool cleaning (eq IS() ISO 46283:1082 Paints and varnishes - Assessment of ageing of films - Specification of the extent, number and severity of general types of defects - Part 1: Specification of casting grades
1S08501-t:1988/Suppl:1994 Surface preparation of steel materials before micro-coating - Visual assessment of surface cleanliness - Part 1: Rust grades and properties of uncoated steel materials and of steel materials after complete removal of existing coatings Rust removal grade supplement, typical sample photos of color changes on steel surfaces treated with different abrasive spraying
1S () 85012:1994 Surface treatment of steel materials before coating - Visual assessment of surface cleanliness - Part 2: Rust removal grades on steel materials after partial removal of the original coating on coated materials Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on September 13, 2002, and implemented on March 1, 2003
GR/T 18839. 2-2002
1S0850]-3: Surface treatment of steel materials before coating - Evaluation of surface cleanliness - Part 3: Surface treatment grades for cutting edges and other defects
IS0/TR8502-1:1991
Surface treatment of steel materials before coating - Evaluation of surface cleanliness - Part 1: Field test of soluble rust products
IS08502-5:1998 Surface treatment of steel materials before coating: Evaluation of surface cleanliness - Part 1: Field test method for the removal of water-soluble rust products
IS0 8502-10:1992
Surface preparation of steel materials before coating - Evaluation of the cleanliness of surfaces - Part 1: Cyclic method for the determination of the presence of water-soluble chlorides - 150 8563-1.19887
Surface roughness characteristics of steel materials blast cleaned before coating - Part 1: Roughness comparison test specimens for the evaluation of abrasive blast cleaning - Technical requirements 180 8503-:t988
Surface preparation of steel materials before coating - Evaluation of the surface roughness of blast cleaned steel materials - Part 2: Roughness comparison test specimens for the evaluation of abrasive blast cleaning - Part 2: Roughness comparison test specimens for the classification of steel surfaces after abrasive blast cleaning - IS() H1124 (full)1)125 (full)
S112 part 2
1S0 12944-4:1398
3 Definitions
Surface preparation of steel materials before coating Technical requirements for metal grinding for blast cleaning Surface preparation of steel materials before coating Test method for metal grinding for blast cleaning Surface preparation of steel materials before coating Technical requirements for non-metal abrasives for blast cleaning Paints and varnishes Corrosion protection of steel structures with abrasive coating systems Part 4: Types of surface preparations
This standard adopts the following definitions
3.1 Abrasive blasting abrasives.1. The material is pushed by centrifugal force or high-energy jet (air or water) to remove the cast iron, oxidation, original silt and other contaminants, and expose the material to the degree of attenuation of the treated material. Due to the characteristics of the abrasive material of the jet cleaning, the state of the original piece and the basic condition of the material to be treated are determined. The degree of attenuation or roughness of the material can be changed by the jet cleaning sequence. The surface roughness shall be evaluated according to the method specified in S0235(13-2. When selecting the treatment method, the initial treatment grade to be recorded shall be considered: if necessary, the degree of contact with the surface shall also be considered, for example: the intermediate coarse grade shall refer to 1S013-1 and [S0)8513-71 to make the tool compatible with the material removal system applied to the surface of the material. The surface treatment cost is proportional to the degree of contact. Therefore, the choice of a system that matches the coating refers to the gradual treatment grade produced, or a material matching system that can achieve the texture grade.
3.2 Blasting abrasive hislleaabsc
Solid material used for abrasive blasting.
3.3 Shot particles
are predominantly angular in shape, with a length not greater than the maximum width of the particle, with a fractured surface and few sharp surface defects.
3.4 ​​Sand particles Rri
are predominantly angular in shape, with a fractured surface and sharp edges, and with a cross-sectional shape less than half the size of the sample surface. 3.5 Cyliadricel particles are shaped particles with an aspect ratio of 1 and a substantially vertical centerline. 4 Abrasives
4.1 Materials and types
1 Limitations,
2 For full titles of [SI) 11124, [51112F and ES) 11!26, see Appendix AG/18839. 2—2002
4.1 A variety of solid materials, both natural and synthetic, and several liquids can be used as abrasives for blast cleaning. Table 1 gives the abrasive materials used and their properties and surface roughness before coating. In selecting abrasives for blast cleaning, the following factors should be considered in relation to the original material: - Classification Type (see Table 1):
Chemical composition:
Particle size range (see 4.1.2) ||tt || Particle hardness (e.g., Kessler, Yuss or Mohs, or other corresponding methods for measuring the hardness). For the standards of metallic and non-metallic blasting materials, see Appendix A (suggestive appendix). Table 1 Commonly used abrasives for blasting cleaning of steel surface treatment
Metallic
Lubricating abrasives
Non-metallic
Wire
Natural
Compound
Arrogant General Stone Sand
Ten Stones
Ironmaking Furnace Disease: Silicon and Calcium Slag
Copper Box Slag
Silicate Iron Bacteria
Explosion Refinement
Standard Reduction
Melting Alumina
Initial Particle Shape
(See Table 2)
Comparison Samples"
Mainly Manual Activity Shrinkage
Air Jet Cleaning
Production Mainly in High-Center Type
Jet Swimming 1) Determine the final roughness of the surface using a comparison sample. The method for evaluating the surface roughness using a comparison sample is specified in ISO 503-2. 2) Some types of materials can change their appearance dramatically during use. Once this happens, the surface viscosity changes and becomes similar to the "nine grid" type of condition. 3) Standard requirements and test methods for blast cleaning of all-separating and non-separating materials are given in Appendix A (indicative appendix). Table 2. Original particle shape
Name and original particle shape
Special shape of particles
Irregular shape of sand particles
Round rod angle
4.1.2 The size and shape of abrasive particles will change during use or repeated use. These changes will affect the final surface characteristics of the material being blasted.
4.2 General requirements
4.2.1 Technical requirements
The abrasive should be smooth (except when it is immersed in a high tension liquid or a water-sand composite material warm sand cleaning system) and can flow freely so that it can be evenly distributed in the jet
CB/T18839.2—2002
The abrasive should meet the requirements specified in ISO11121 and ISO11126 series standards and should not contain corrosive components and dirt that affects deep adhesion. It is not allowed Use of abrasives that have been permanently contaminated by water, such as abrasives that cannot be cleaned before recycling, and slag abrasives that have been cooled into particles using salt water, i.e. seawater. 4.2.2 Health and safety
Equipment, materials and abrasives for surface treatment may cause harm if used improperly. Regulations concerning materials and abrasives that are harmful to health during and after use (e.g. free silicon monoxide, carcinogenic or toxic substances) should be formulated and observed. The use of the above materials and abrasives in the regulations should be Detailed description and necessary precautions should be taken. 4.3 Abrasive Selection
4.3.1 In order to achieve the required surface treatment standards, appropriate abrasives should be selected while selecting appropriate blast cleaning methods and working conditions.
The types of abrasives used for blast cleaning include particle size distribution, shape, hardness, density and impact characteristics (deformation or crushing characteristics), which are very important for ensuring the cleanliness standard, cleaning efficiency and the surface quality of the blast cleaning surface. The distribution of particle size shall be determined by the force method specified in GB/117849 or ISO 5011125-2 (see Appendix A). 4.3.2 It is recommended to carry out preliminary tests for blast cleaning to determine the most effective abrasive, the most complete surface preparation level and surface roughness (see GB/T892:3 and ISO8.503-2). If a recirculating abrasive is used for surface treatment, preliminary tests should be carried out using sample materials because new abrasives may give erroneous conclusions (see 4.3.3.c). 4.3.3 When selecting an abrasive, the following factors should be considered: a) The effect of particle size on the final roughness. Usually, metallic abrasives have a greater effect than non-metallic abrasives because of their different breaking properties and the difference in strength that affects the kinetic energy of the abrasive particles. b) The appropriate mixture of particle size will produce the best cleanliness, cleaning efficiency and surface roughness. :) In a blast cleaning device where the abrasive is repeatedly recycled, the following are the components: before the abrasive is used again, dust and contaminants are removed; abrasive lost by wear and adhering to the workpiece is replenished, which can be achieved by adding new abrasive in a controlled manner so that the abrasive mixture remains within a predetermined particle size and distribution within the intended use range. In a blast cleaning device, if all the abrasive recycled is new, the abrasive mixture will reach a stable state after a period of use.
5 Abrasive blast cleaning methods
5.1 Dry abrasive blast cleaning
5.1.1 Centrifugal abrasive blast cleaning
5.1.1.1 Principle
Centrifugal abrasive blast cleaning is carried out in a fixed or mobile closed device. In this device, the material is fed to a rotating impeller and is projected uniformly at high speed onto the surface to be treated. 5.1.1.2 Application
This method is applicable to continuous operation of workpieces with accessible surfaces. It can also be used for workpieces with different corrosion levels (see GB/T8923).
Note 3: Most centrifugal solvent blast cleaning equipment is fixed and the particles are circulated in a closed system or passed through the equipment or rotated in the equipment. In this case, the equipment is movable. Therefore, it can be used to clean large continuous objects, such as ship hulls and oil storage tanks. 5.1.1.3 Effectiveness
This method can be used for all corrosion levels specified in GB/T3923, up to grade Si13. 5.1.1.4 Limitations
Centrifugal abrasive blast cleaning equipment must be set each time it is used. Therefore, this method is limited to repeated operations with high production or continuous production.
GB/T 18839.2—2002
General centrifugal abrasive blast cleaning cannot completely remove chemical contaminants on the steel surface. If these chemical contaminants are to be completely removed, additional treatment should be performed (see 6.3). 5.1.2 Compressed air abrasive blast cleaning
5. 1.2.1 Principle
Compressed air abrasive blast cleaning is to add abrasive into the air flow.The air and abrasive mixture is ejected from the nozzle at high speed onto the surface to be cleaned. The abrasive can be injected into the air stream from a pressurized container or sucked into the air stream from a non-pressurized container by an air pump. 5.1.2.2 Scope of application
This method is applicable to the treatment of various types of workpieces (including large and small structural parts) and can also be used for parts with different corrosion levels (see GB/T8923).
This method can be used both continuously and discontinuously, and can be used in places where centrifugal material jet treatment (see 1.1) is not applicable. This cleaning system can be used in factories, indoors, in operating boxes or on-site construction sites. 5.1.2.3 Effectiveness
This method is multi-purpose and can achieve Sa3 grade on steel surfaces of various corrosion levels specified in GB/T8923. 5.1.2.4 Limitations
This method will not cause the spread of free dust. Therefore, the use of this method is limited in cases where dust removal or exhaust equipment cannot meet the requirements of environmental protection regulations.
Compressed air abrasive blasting cannot completely remove chemical contaminants on the surface of weak materials. If it is necessary to completely remove these chemical contaminants, additional treatment should be made (see 6.1 or 6.3). 5.1.3 Vacuum or negative pressure head abrasive blasting cleaning 5.1.3.1 Principle
This method is similar to compressed air abrasive nozzle blasting (see 5.1.2), but the nozzle is enclosed in a negative pressure head that is in close contact with the steel surface. The latter collects the used particles and contaminants. On the other hand, the abrasive flow is sucked into the treatment chamber by the pressure at the negative pressure head. 5.1.3.2 Applicable scope
This method is particularly suitable for local cleaning in cases where other blasting cleaning methods cannot be used due to dust and debris generation problems, and at the same time certain technical requirements (such as the negative pressure head is tightly sealed to the surface) can be met. 5.1.3.3 Effectiveness
This method is clean and produces almost no dust in the cleaning area and can reach the 5a2< level defined in GB/T8923. After a long cleaning period, it can reach the Sa3 level.
5.1.3.4 Limitation
This method consumes more time than other blast cleaning methods. It is not suitable for cleaning steel with serious corrosion (such as rust level 1 specified in GB/T8923). It is not suitable for irregularly shaped surfaces because it requires the negative pressure head to be closely attached to the surface and is difficult to operate. Generally, vacuum or negative pressure head abrasive blast cleaning cannot completely remove chemical contaminants on the surface of steel. If these chemical contaminants need to be completely removed, additional treatment should be performed (see 6.1 and 6.3). 5.2 Abrasive blast cleaning
5.2.1 Overview
The water used for wet abrasive blasting should be low in salt to avoid contamination of the surface to be treated. 5.2.2 Abrasive blasting with water injection at the jet inlet 5.2.2.1 Principle
This method is similar to compressed air abrasive blasting (see 5.1.2), but a small amount of liquid (usually clean fresh water) is injected into the air abrasive stream at the nozzle inlet. There is no suspended dust less than 50 μm during the blasting process. The water consumption can be controlled, usually 15 [./lh~25 L/lh. Appropriate corrosion inhibitors can be added to the water (see 5.2.2. 4). 5.2.2.2 Scope of application
GR/T 18839.2·2002
The method is suitable for cleaning various types of workpieces (including large structural parts). It is also suitable for parts with various corrosion levels (see GB/T8923) if the amount of dust added can be controlled according to the dust density. The liquid should usually be mixed in a uniform manner so that it does not drip into the mouth in the form of drops, which means that each abrasive grain is surrounded by a thin layer of dust to avoid the formation of dust around it when the grain collides with the micro-processing surface. 5.2.2. 3 Effectiveness
This method has wide applicability and can achieve Sa3 grade on all rust grades of steel specified in GB/T8923. 5.2.2.4 Limitations
The surface treatment quality achieved by this method is compared with dry air abrasive blasting treatment (see 5.1.2). The only difference is that the surface is wet at the beginning after treatment. A few minutes of moisture (this time depends on the surrounding environmental conditions) may cause slight rust on the surface. If "sea rust" occurs, it is necessary to select a suitable coating system. When a corrosion inhibitor is used, it should be compatible with the subsequent coating system. Note 4: If the agent is used frequently in water, it may require a specific water treatment process to meet the requirements of the relevant environmental protection regulations. 5.2.3 Air abrasive blasting treatment
5.2. 3.1 Principle
This method is similar to compressed air abrasive blast cleaning (see 5.1.2), except that liquid (usually clean fresh water) is added to the nozzle outlet to produce a jet containing air, water particles and abrasives. Appropriate etchants can be added to the water (see 5.2.3.4). 5.2.3.2 Scope of application
This method is suitable for cleaning various types of workpieces (including large components), and is suitable for workpieces of various rust levels (see GB/T8323), especially for workpieces with pitting corrosion and chemical pollution. Steel, provided that the presence of water is allowed. It can be used for both continuous and intermittent operation, and is particularly suitable for occasions where the soluble salt residue on the surface to be cleaned is low. When treating surfaces that are still under maintenance, the original coating can be partially or selectively removed by adjusting the pressure to adjust the condensation ratio of air, water and blanks.
5.2.3.3 Effectiveness
This method can achieve Se3 level specified in GB/T8923. It is used to reduce the amount of volatile pollutants and minimize the dust generated during the process. Because water is added at the nozzle outlet, the effect of chemical cleaning is much lower. 5.2.3.4 Limitation
The surface treated by spraying is often covered with mortar, which hinders the inspection of the operator. The mortar should be blown off with compressed air or flushed with water. Before the material is removed, the surface must be dry and a thin layer of rust may appear. If this thin layer of rust is considered to be harmful to the subsequent coating, it should be removed. The presence of water is not allowed in this method. The abrasive is generally limited to non-potable materials. When an etchant is used, it should be compatible with the subsequent rolling system. Note: If an etchant is used in this method, the test may require a specific rust treatment process to meet local environmental protection requirements. 5.2.4 Mortar spraying method
5.2.4.1 Principle
The dense water-sand mixture suspended in a colloid or other colloid is sprayed onto the surface to be treated by compressed air or compressed air. A suitable buffer may be used (see 5.2.3, 4). 5.2.4.2 Application
This method is suitable for surfaces with extremely small surface roughness requirements. It is often used for small workpieces. 5.2.4.3 Effectiveness
This method can obtain a particularly smooth surface state and is particularly suitable for reducing the amount of water-soluble salt. 5.2.5 High-quality water spraying cleaning
5.2.5. 1 Principle
GB/T 18839. 2—2002
Introduce an abrasive or a mixture of abrasives into a liquid stream (usually fresh water for cleaning). The liquid stream is sprayed onto the surface to be cleaned through a nozzle. The jet is mainly pressurized liquid, and the solid abrasive added is usually less than compressed air wet blasting. The introduced abrasive can be compressed air (with or without air) or wet mortar. The water towel can be added with an appropriate retarder (see 5.2.3.1). 5.2.5.2 Scope of application
Compressed air abrasive blasting (see 5.2.3.2). 5.2.5.3 Effectiveness
This method can achieve Sa3 grade on steels with rust grades AB and C specified in GTB/T8923: S12 grade on steels with rust grade D. It is particularly suitable for reducing the amount of water-soluble contaminants, but it is more difficult to control than compressed air wet abrasive blasting in removing water-soluble salts (see 5.2.3) . Design and high pressure water are potentially dangerous. 5.2.5.4 Limitations
Compared to compressed air wet abrasive blasting (see 5.2.3.4). 6 Procedure
6.1 Preparation before blasting
Visually inspect for the presence of oil, grease, salt and similar contaminants. Remove all contaminants by degreasing or washing and inspect for residual contaminants. Mask off areas not to be blasted. Suitable methods for removing contaminants are described in 150)12944-4. Method 6: It is important to remove the deposits of grease, grease, other dust and residues on the surface before blasting, preferably with a detergent or a clean organic solvent. If this process is neglected, when these contaminants are transferred to the new abrasive, it may be impossible to remove the deposits on the used abrasive by cleaning with a cleanser.
Note 7: The use of a power or mechanical cleaning agent before blasting should be avoided.Please first remove the original, attached and firm chain and oxide scale to facilitate the subsequent cleaning operation (see GB/18803.3-2102). In addition, it is recommended to perform preliminary treatment on the weld to remove welding avoidance, burrs and other edges (see IS) 8501-3). 8: When using a mixed blanking blasting cycle (see 5.2), a suitable optional agent may be added to the ring body to help eliminate inflammation, grease, dust and volatile salts during the blast cleaning process. 6.2 Blasting Cleaning
6.2.1 The method described in G13/T8923 and/or IS(4628-3 shall be used to assess the rust level of the parts within the scope of the contract or technical specification (if any).
6.2.2 Refer to G.2.1. G1/T8923 and/or IS(8501-2 for the surface preparation level requirements. Also refer to [S8503-1 to determine the surface roughness requirements. 6-2.3 According to the method described in Section 5 Specified blast cleaning method, select appropriate method for surface treatment to achieve the required surface treatment level and surface roughness
6.2.4 Select appropriate abrasive blast cleaning method and appropriate particle size to suit the characteristics of the component, the equipment requirements for blast cleaning, and the surface treatment level and surface roughness requirements to be achieved. For information on existing abrasive standards, see Appendix A (suggestive appendix); for English and Chinese comparisons of the names of abrasive blast cleaning methods, see Appendix B (suggestive appendix). 6.3 Post-blast cleaning treatment
After blast cleaning, use a vacuum cleaner, brush or degreased and dehumidified compressed air to remove dust, debris and common materials on the surface. If you want to reduce Residual removable impurities should be cleaned with steam jet, hot fresh water, cleaning agent or other suitable cleaning agent (followed by fresh water rinse) and allowed to dry.
After wet blast cleaning, wash away abrasive and other residues with fresh water. The water may contain appropriate retarder. Before applying the coating, the surface may be dried with degreased and decondensed compressed air or other methods (such as hot air) to help the surface dry. Before removing the coating, the blast-cleaned surface may require drying and may appear "rust". If it is considered harmful to subsequent processing, this thin oxide film must be removed. 6.4 Evaluation of blast-cleaned surfaces
GB/T18839.2---2002
Based on According to the force method specified in GB/T8923, IS(）8501 and ISO8502, assess whether all cleaned surfaces meet the requirements of the same or technical specifications. If they do not meet the requirements, repeat the above process. Note 9, [ISO8501-1 Supplement provides typical sample photos of color changes on steel surfaces that have been dry-blasted with different gold screen and non-gold screen abrasives and have reached Sa3 grade.
If specified or agreed, the surface should also be additionally assessed in accordance with (B/T18570.2-2001, 1ISO/TR8502-1, IS(）8502-9, ISO8502-10 and IS(）8503·2. 8
GB/T 18839.2—2002
Appendix A
(Informative Appendix)
Standard for Metallic and Non-Metallic Abrasives for Blasting A1 Technical requirements and test methods for metallic abrasives for blasting, exempt from IS11124 and IS(11125. [S0 11124] under the general title "Technical requirements for metallic abrasives for blasting of steel surfaces before coating" consists of the following parts: - Part 1: General and classification
Part 2: High-grade cast iron sand
Part 3: High-carbon cast steel shot and sand
Part 4: Low-grade cast steel shot
IS(11125) under the general title "Test methods for metallic abrasives for blasting of steel surfaces before coating" consists of the following parts:
Part 1 Sampling
Part 2: High-grade cast iron sand
Part 3: High-carbon cast steel shot and sand
Part 4: Low-grade cast steel shot
Part 1 Sampling
Part 2: High-grade cast iron shot ... Part 1: Determination of particle size distribution Part 2: Determination of hardness Part 3: Determination of apparent density Part 4: Determination of apparent density Part 5: Determination of percentage of defective particles and microstructure Part 6: Foreign impurities Part 7: Determination of water content A42 Technical requirements and test methods for non-metallic abrasives for blast cleaning, see ISO 11126 and GB/T 17849. ISO 11126 is organized under the general title "Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating" as follows: Part 1: General Classification Part 3: Refining slag Part 4: Coal furnace slag Part 5: Nickel refining slag Part 6: Ironmaking furnace slag Part 7: Nickel refining slag Part 8: Ironmaking furnace slag Part 3: Fused Alumina
---Part 8: Peridot Sand
---Part 9: Six-Character Stone
Part 10: Iron Pot Stone Tubular Stone
The above-mentioned Part 3 has been formulated as a national standard. That is, GB/T17850.3-1990 Technical requirements for non-metallic abrasives for surface treatment of steel materials before coating removal Copper refined slag (EV15011126-3: 1995) GB/T178 49 Test method for non-metallic abrasives for blast cleaning of steel surfaces before spot coating (ISO 11127:19531) consists of the following:
- Sampling
Determination of particle size distribution
Apparent density
Evaluation of hardness by glass slide test
Determination of water content
Determination of electrical conductivity of the liquid
Determination of water-soluble oxides2—2002
Appendix A
(Informative Appendix)
Standard for Metallic and Non-Metallic Abrasives for Blasting A1 Technical requirements and test methods for metallic abrasives for blasting, exempt from IS11124 and IS(11125. [IS011124] under the general title "Technical requirements for metallic abrasives for blasting of steel surfaces before coating" consists of the following parts: - Part 1: General and classification
Part 2: High-grade cast iron sand
Part 3: High-carbon cast steel shot and sand
Part 4: Low-grade cast steel shot
IS(11125) under the general title "Test methods for metallic abrasives for blasting of steel surfaces before coating" consists of the following parts:
Part 1 Sampling
Part 2: High-grade cast iron sand
Part 3: High-carbon cast steel shot and sand
Part 4: Low-grade cast steel shot
Part 1 Sampling
Part 2: High-grade cast iron shot ... Part 1: Determination of particle size distribution Part 2: Determination of hardness Part 3: Determination of apparent density Part 4: Determination of apparent density Part 5: Determination of percentage of defective particles and microstructure Part 6: Foreign impurities Part 7: Determination of water content A42 Technical requirements and test methods for non-metallic abrasives for blast cleaning, see ISO 11126 and GB/T 17849. ISO 11126 is organized under the general title "Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating" as follows: Part 1: General Classification Part 3: Refining slag Part 4: Coal furnace slag Part 5: Nickel refining slag Part 6: Ironmaking furnace slag Part 7: Nickel refining slag Part 8: Ironmaking furnace slag Part 3: Fused Alumina
---Part 8: Peridot Sand
---Part 9: Six-Character Stone
Part 10: Iron Pot Stone Tubular Stone
The above-mentioned Part 3 has been formulated as a national standard. That is, GB/T17850.3-1990 Technical requirements for non-metallic abrasives for surface treatment of steel materials before coating removal Copper refined slag (EV15011126-3: 1995) GB/T178 49 Test method for non-metallic abrasives for blast cleaning of steel surfaces before spot coating (ISO 11127:19531) consists of the following:
- Sampling
Determination of particle size distribution
Apparent density
Evaluation of hardness by glass slide test
Determination of water content
Determination of electrical conductivity of the liquid
Determination of water-soluble oxides2—2002
Appendix A
(Informative Appendix)
Standard for Metallic and Non-Metallic Abrasives for Blasting A1 Technical requirements and test methods for metallic abrasives for blasting, exempt from IS11124 and IS(11125. [IS011124] under the general title "Technical requirements for metallic abrasives for blasting of steel surfaces before coating" consists of the following parts: - Part 1: General and classification
Part 2: High-grade cast iron sand
Part 3: High-carbon cast steel shot and sand
Part 4: Low-grade cast steel shot
IS(11125) under the general title "Test methods for metallic abrasives for blasting of steel surfaces before coating" consists of the following parts:
Part 1 Sampling
Part 2: High-grade cast iron sand
Part 3: High-carbon cast steel shot and sand
Part 4: Low-grade cast steel shot
Part 1 Sampling
Part 2: High-grade cast iron shot ... Part 1: Determination of particle size distribution Part 2: Determination of hardness Part 3: Determination of apparent density Part 4: Determination of apparent density Part 5: Determination of percentage of defective particles and microstructure Part 6: Foreign impurities Part 7: Determination of water content A42 Technical requirements and test methods for non-metallic abrasives for blast cleaning, see ISO 11126 and GB/T 17849. ISO 11126 is organized under the general title "Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating" as follows: Part 1: General Classification Part 3: Refining slag Part 4: Coal furnace slag Part 5: Nickel refining slag Part 6: Ironmaking furnace slag Part 7: Nickel refining slag Part 8: Ironmaking furnace slag Part 3: Fused Alumina
---Part 8: Peridot Sand
---Part 9: Six-Character Stone
Part 10: Iron Pot Stone Tubular Stone
The above-mentioned Part 3 has been formulated as a national standard. That is, GB/T17850.3-1990 Technical requirements for non-metallic abrasives for surface treatment of steel materials before coating removal Copper refined slag (EV15011126-3: 1995) GB/T178 49 Test method for non-metallic abrasives for blast cleaning of steel surfaces before spot coating (ISO 11127:19531) consists of the following:
- Sampling
Determination of particle size distribution
Apparent density
Evaluation of hardness by glass slide test
Determination of water content
Determination of electrical conductivity of the liquid
Determination of water-soluble oxides
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