This part of GB/T 18838 specifies the classification and marking of metal abrasives used for blast cleaning of steel surfaces before coating. This part applies to the marking of unused metal abrasives. GB/T 18838.1-2002 Technical requirements, guidelines and classification of metal abrasives used for blast cleaning of steel surfaces before coating GB/T18838.1-2002 Standard download decompression password: www.bzxz.net
This part of GB/T 18838 specifies the classification and marking of metal abrasives used for blast cleaning of steel surfaces before coating. This part applies to the marking of unused metal abrasives.

ICS 25. 220. 10
National Standard of the People's Republic of China
GB/T18838.1—2002
Surface preparation of steel substrates before coating
Technical requirements, guidelines and classification of metallic abrasives for blast cleaning
Preparation of steel substrates before application of paints and related products--Specifications for metallic blast-cleaning abrasives---General intraduction and classification(1S0) 11124-l:1993, Preparation of steel substrates before applicationof paints and related products--Specifications lorrietallic blast-eleaning abrasives-Parl 1 :Gcneral introduction This part of GB/T 18838 is compiled based on ISO 11124:1:1993 “Technical requirements for metallic abrasives for blast cleaning of steel surfaces before coating – Part 1: Guidelines and classification” and is equivalent to the international standard in terms of technical content. This part is written in the format according to the provisions of GB/1.12000. Compared with ISO 11124-1:1S93, the introduction and Appendix A are deleted; the format of the chapter "Marking" of the international standard is modified. ISO 11124 is composed of the following parts under the general title "Technical requirements for metal abrasives for blast cleaning of steel surface treatment before coating": Part 1: Guidance and classification Part 2: Pinghuo cast iron sand Part 3: High-embedded cast steel shot and sand Part 1: Low carbon cast steel shot Part 5: Steel wire segments Part 5 is currently under development. This part is part of the standard requirements for metal abrasives for blast cleaning in ISO (11124). The test methods for metal abrasives for blast cleaning are shown in ISO 11125. ISO (11125) In the general title \ Preparation of steel surfaces before coating - Test methods for metallic abrasives for blast cleaning \ The following parts are organized:
Part 1: Sampling
Part 2: Determination of particle size distribution
Part 3: Determination of hardness
Part 4: Determination of apparent density
Part 5: Determination of percentage of defective particles and microstructure
Part 6: Determination of foreign matter
Part 7: Determination of water content
The requirements for non-metallic abrasives commonly used for blast cleaning can be found in ISO 11126. ISO 11126 It consists of the following parts under the general title "Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating": Part 1: Guidance and classification Part 3: Copper refining slag Part 4: Coal furnace slag Part 5: Refining slag Part 6: Refining slag Part 7: Molten lead oxide Part 8: Olivine sand Part 9: Staurolite Part 10: Iron aluminum garnet The above Part 3 has been formulated into a national standard, namely GB/T 17850.31999 Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating Steel refining slag (eqIS0 11126-3:1993) GB/T 18838.1~2002
Test methods for non-metallic abrasives for blast cleaning are given in ISO 11127. ISO 11127 consists of the following parts under the general title "Surface preparation of steel substrates before coating - Test methods for non-metallic abrasives for blast cleaning":
Part 1: Samples
Part 2: Determination of particle size distribution
Part 3: Determination of apparent density change
Part 4: Evaluation of hardness by glass slide test Part 1 to 7 include the formulation of national standards, (G3/T17849-1999) Abrasive blast cleaning technology is widely used in surface cleaning and treatment. When formulating the international standard series for the surface treatment of steel before coating, it was decided that a series of international standards covering the commonly used abrasives for blast cleaning of steel surfaces should be formulated. The type and particle shape of the abrasive used for blast cleaning will seriously affect the roughness of the surface preparation after treatment. The supplement to ISO85011 gives typical photographs of the changes in the surface of steel when blast cleaning is performed using different types of abrasives. (ISC) 8501-1:1988/Supplementary material: Visual assessment of surface cleanliness of steel surfaces before coating - Part 1: Rust grade and rust removal grade of painted steel and wood after complete removal of existing coatings - Supplementary material: Typical sample photographs of color changes on steel surfaces blasted with different abrasives)
ISO8.032 gives comparative characteristics of surface finish after surface treatment. Table 1 in Part 1 of ISO 11124 specifies the comparison type of each blasting abrasive. (IS0850:3-2:1988 Surface treatment of steel before removal of coatings - Roughness characteristics of steel surfaces after blasting - Part 2: Comparative method of roughness classification of steel surfaces after blasting) This part is handled by China State Shipbuilding Corporation. This part is under the jurisdiction of China Shipbuilding Industry Ship Technology Research Institute. The initiators of this part are China Shipbuilding Industry Comprehensive Technology and Economic Research Institute and Fujian Longhai Multi-core Steel Sand Co., Ltd. The main contributors of this part are Mi Yanyuan, Shang Xinhui and Mei Aile. Surface treatment of steel before coating
Technical requirements and classification of metal abrasives for blasting
GB/T 18B38.1—2002
It is warned that equipment, materials and abrasives used in surface preparation may be dangerous if care is not taken. Many countries have regulations for materials that are considered dangerous during and after use (material management), such as free special substances, carcinogens or toxic substances. Therefore, these regulations should be followed and it is important to ensure that adequate guidance is given and that all required precautions are implemented. 1 Scope
This part of GB/T 18838 covers the classification and marking of metallic abrasives used for blast cleaning of steel surfaces before coating.
This part applies to the marking of unused metallic abrasives. Note 1: This part 0 11124 It is specially formulated for the treatment requirements of steel components. The characteristics specified in this specification are applicable to the surface parts of other materials treated by abrasive blasting. These technical specifications are specified in IS08504-2:20058 Surface treatment of steel materials before coating - Surface treatment methods - Part 2: Abrasive blasting. 2 Terms and definitions
The following terms and definitions apply to this part of GB/T18838. 2.1
Abrasive blast-cleaning ahrasive 2.2 wwW.bzxz.Net
For solid materials used in abrasive blast-cleaning,
Abrasive blast-cleaning ahrasive Blast-cleaning is a surface treatment method that uses a high-energy abrasive stream to impact the surface to be cleaned. Shot
is a particle with a main shape of angular shape, a length not greater than twice the maximum particle width, and no edges, broken sections, or other sharp surface defects. Grit
is a particle with a main shape of angular shape, with broken sections and edges, and the shape of the broken section is less than half of the cross section. 2.5
Cylindric
cylindricnl parts
is a sharp-shaped particle with an aspect ratio of 1 and a cross section that is approximately perpendicular to the center line, 3 categories
3.1 Types of materials
GB/T 18838.1 2002
Metal materials should be classified according to material, origin or manufacturing method. The commonly used blast cleaning abrasives for steel surface treatment are shown in Table 1. Note 3 The materials listed in Table 1 are some metal abrasives commonly used for surface treatment of copper materials before coating, but they are not all metal abrasives. 1 Abrasives for blast cleaning of steel surface treatment
Metal abrasives for blast cleaning!
Initial shape of the cutter
Comparison sample:
, when evaluating the final quality, use the comparison sample to evaluate the quality of the sample. The method of using the comparison sample to evaluate the quality of the sample is as follows: 15 (hereinafter referred to as GB/T 185532) stipulates that some types of spectra will change their appearance dramatically during use. In this case, the roughened surface can be processed and the appearance will become closer to the "machine shape" appearance.
3.2 Initial particle shape
The particle shape is the geometric shape of the particles of the material. The shape of the metal abrasive particles and their derivatives can be found in Table 2. Note 3: Since the particle shape of the particles will change after use, the particle shape specified in each part of GB/T 18838 refers to the initial shape. Table 2 Initial particle shape
Name and final particle shape
Pellets. Surface shape
Sand particles - irregular angular shapes
Spherical particles, sharp edges
3.3 Particle size range
Mixtures of particles of different sizes should be classified according to size specifications or specifications. Size specifications or specifications are represented by three digits. This number represents the approximate value of the midpoint of the size range or the nominal diameter. It is expressed as 1 in meters. For example: Specification 200
represents the approximate value of the midpoint of the size range or the nominal diameter of 2.00 mr, and the particle size range is greater than 1.70 mm, the ratio is more than 80%, and there is no particle size larger than 2.36 mm. 4 Marking
4.1 The product marking of metal abrasives consists of the following parts: product name, technical characteristic value and standard number, expressed as;
G1/T 18R38.1
Hardness (if specified, Vickers hardness)
Primary particle shape derivative
Abbreviation of abrasive
4.2 Marking examples
Example 1:
GE/T 18838.1—2002
Meeting the requirements of (partial requirements of B/T1S838, the initial particle shape is "second particle", the specification is 100 (that is, the nominal size of the particle is 1.00rani) cast iron type metal abrasive is marked as: Abrasive M/C1 GJon GB/T 18838.1
Example 2:
Complies with the requirements of the corresponding part of G/F15838, the initial particle shape is "grain" and the specification is 140 (that is, the nominal size of the rebellious particle is 1.4m11, and the hardness range is 570HV~710V. The high carbon cast steel type Jinzhan abrasive is marked as 570HV-710IVGB/18838.1
Abrasive M/HCSGI45
Mark on the order form. This complete product mark is the packaging mark and batch number mark of Biduo| |tt||All supplies shall be clearly marked in accordance with the provisions of Chapter 1. If the product is packaged in pallets, barrels, boxes, the product code label shall be included on the outside of the package. If the product is packaged in small containers, the shape and specification code shall be clearly marked on the outside of the package. Note: The size should be included in the package. The specific product date or batch number should be included in the packaging. At least the traceability mark should be included in the packaging markings such as pallets, boxes, etc.
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