This part is a part of the national standard GB/T19816 on the sampling and testing of metal abrasives for blast cleaning. The types of metal abrasives and the requirements for each type are included in the various parts of ISO11124. ISO11124 and GB/T19816 are a series of standards on metal abrasives for blast cleaning. For all information about these two series of standards, see Appendix A. This part of GB/T19816 specifies the sieving determination method for the particle size of metal abrasives for blast cleaning. GB/T 19816.2-2005 Test methods for metal abrasives for blast cleaning for surface preparation of steel before coating Part 2: Determination of particle size distribution GB/T19816.2-2005 Standard download decompression password: www.bzxz.net
This part is a part of the national standard GB/T19816 on the sampling and testing of metal abrasives for blast cleaning. The types of metal abrasives and the requirements for each type are included in the various parts of IS011124. ISO11124 and GB/T19816 are a series of standards for metal abrasives for blast cleaning. For all information about these two series of standards, please refer to Appendix A. This part of GB/T19816 specifies the sieving method for determining the particle size of metal abrasives for blast cleaning.

ICS 25.220. 10
National Standard of the People's Republic of China
GB/T 19816.2—2005/IS0 11125-2:1993 Preparation of steel substrates before application of paints and related products-Test methods for metallic blast-cleaning abrasives-Part 2:Determination of particle size distribution(ISO 11125-2:1993,IDT)
Published on June 10, 2005
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on November 1, 2005
GB/T 19816.2--2005/IS0 11125-2:1993 Test methods for metallic abrasives for blast cleaning" is divided into the following parts: 16 Surface preparation of steel before coating
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!
- Part 8: Determination of mechanical properties of the material. This part is the second part of GB/T19816. This part adopts 1S0111252:1993 Surface preparation of steel before coating - Test methods for metallic abrasives for blast cleaning - Part 2: Determination of particle size distribution (English version). For the purpose of this part, the following editorial changes have been made: a) "This international standard" is replaced by "this part"; b) "" is used as a decimal point instead of ""; d) "" is used as a comma instead of ""; d) The foreword of the international standard is deleted; e) The list of national standards corresponding to the international standard "Metallic materials for blast cleaning" is added to Appendix A. Appendix A of this part is an informative appendix. This part is proposed by China State Shipbuilding Corporation. This part is under the jurisdiction of the Sub-Technical Committee on Metal Surface Treatment before Painting and Painting Process of the National Technical Committee for Standardization of Paints and Materials: Drafting unit of this part: China Shipbuilding Industry Comprehensive Technology and Economic Research Institute. China Shipbuilding Industry 11th Research Institute. Main drafters of this part: Song Yanyuan, Liu Bingyang, Bo Jianhua. 1 Scope GB/T 19816.2—2005/IS0 11125-2:1993 Recommended surface preparation of steel before painting
Test methods for metal abrasives for blast cleaning Part 2: Determination of particle size distribution
This part is a part of the national standard GB/T 19816 on sampling and testing of metal abrasives for blast cleaning. The types of metal abrasives and the requirements for each type are included in the various parts of ISO11124. ISO11124 and GB/T198[6 are a series of standards on metal abrasives for blast cleaning. For all information about these two series of standards, see Appendix A.
This part of GB/T19816 specifies the screening determination method for the particle size of metal abrasives for blast cleaning. 2 Normative referenced documents
The clauses in the following documents are adopted by GB/T 19816. The references to this part of the Standard become the clauses of this part. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to investigate whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part.
Part 1:
GB/T19816.1--2005 Test method for sampling of metal abrasives for blast cleaning of coated steel surfaces (IS 11125 1:1993,1DT)
ISO565:1990 Test sieves Basic size of wire mesh. Perforated plate and electroformed sheet mesh
3 Instruments
In addition to conventional laboratory instruments and glassware, the following equipment should also be included: 3.1 Balance
Accuracy is 0.1 mm:
3.2 Test sieves
The test sieve is round, with a diameter of 25 mm-~50 mm, a metal frame, and a sieve of about 200 nm in diameter. The aperture range of conventional test sieves is determined according to the specifications of the tested product and should comply with the requirements of Table 2 in ISO565:1990, as shown in Table 1 of this part. The test sieve should have square holes and be equipped with a sieve cover and a collection tray. The test sieve should be calibrated and inspected regularly and should be free of residual abrasive. Note: It is impossible to accurately screen the sample with a small diameter test sieve. Table 1 Table of apertures of conventional test sieves (selected from IS0565:1990; specifications are R20/3 and R40/3) mt
GB/T 19816.2—2005/IS0 11125-2; 1993 3.3 Slap-type vibrating sieve machine
Slap-type vibrating sieve machine is used to stir the sample. The sieving sample should be carried out in a suitable vibrating sieve machine, which should have two functions of plane rotation and vertical movement that produces strong vibration or knocking effect. The vibrating sieve machine should be firmly installed. Note: Manual sieving or other mechanical systems that only vibrate or rotate cannot accurately sieve the sample. 3.4 1/1 Sample distributor
4 Sampling
Draw a representative sample of the product to be tested according to the provisions of GB/T19816, 1-2005. 5 Steps
Take two samples for determination.
5.1 Use the 1/1 sample divider (3.4) to draw a sample of about 100 g. 5.2 Use the balance (3.1) to weigh (100 ± 0.5) g of the test material (mc). Note that the addition of a test material tray may result in inaccurate screening. 5.3 Classify all test sieves according to the requirements of the grade and screening specification table specified in the relevant part of ISO 11124 (see Appendix A). If the material is not included in ISO 11124, arrange it in a method agreed by both parties concerned. 5.4 Arrange the test sieves (3, 2) from top to bottom according to the density level, with the largest mesh at the top and the smallest mesh at the bottom. A collection tray is placed below to receive all the abrasive that passes through the smallest mesh. 5.5 Place the test material on the top test sieve. 5.6 Cover the top test sieve.
5.7 Place the test sieve frame with the test material into the slap-type vibrating screen machine 3.3) and stir the circular abrasive for at least 10 minutes and the angular abrasive for at least 15 minutes.
Note: The stirring time should be selected so that the change in the accumulation of each layer of the sieves on the sieve frame does not exceed 0.5% every 5 minutes. 5.8 Carefully remove the beard sieve from the sieve frame, pour the abrasive remaining on the sieve into the closed flat plate, brush all the abrasive adhering to the sieve and add it to the large flat plate. Weigh to the nearest 0.1 and record the result (m). Repeat this operation for all sieves on the sieve frame, including the lowest collection plate, and weigh the abrasive remaining on them. Calculate and record the accumulation rate of abrasive remaining on each sieve. If it is less than 99% of the initial amount, collect and test it again.
6 Explanation of results
The mass percentage R of the abrasive retained on each test sieve and collection disc is calculated according to the formula (1): R=㎡×100
Where:
nn—mass of the test material, in grams (g): m)—mass of the abrasive retained on the sieve or disc, in grams (g). (1)
If the cumulative abrasive retained on each test sieve differs by more than 10% (relative to the higher result), repeat the steps specified in Chapter 5.
Calculate the average of the two valid test results of the retained abrasive. The calculated result is accurate to 1%.
7 Precision
Differences in sieve openings within the limits allowed by ISO 565:1990 may cause significant differences in test results for the same material. Once such differences occur, it is recommended that users and suppliers exchange samples or sieves. 8 Test report
The test report shall at least include the following contents: a)
GB/T 19816.2—2005/ISO 11125-2:1993 All necessary details of the tested product shall be marked according to the corresponding part of ISO11124: This part standard number (GB/T19816.2—2005); test results;
Difference from the specified test method;
Test date:
Tester,
GB/T 19816.2—2005/1SO 11125-2:1993 Appendix A
(Informative Appendix)
International Standard for Gold Abrasives for Blasting Cleaning
IS()11124 and IS()11125 are standards regarding the technical requirements and test methods for metal abrasives for blast cleaning. ISO 11121, under the general title Surface preparation of steel substrates before coating - Specification for metallic abrasives for blast cleaning, consists of the following parts:
Part 1: Guidelines and classification;
Part 2: Chilled titanium cast sand;
Part 3: High carbon cast steel shot and grit;
Part 4: Low carbon cast steel shot;
Part 5: Steel wire sections.
Test methods for metallic abrasives for blast cleaning" is composed of the following parts under the general title "Surface preparation of steel substrates before coating":
... Part 1: Sampling.
.--- Part 2: Determination of particle size distribution;
Part 3: Determination of hardness;
Part 4: Determination of apparent gradation;
Part 5: Determination of percentage of defective particles and microstructure;
Part 6: Determination of foreign matter;
Part 7: Determination of water content; www.bzxz.net
Part 8: Determination of mechanical properties of abrasives. List of national standards corresponding to the international standard "Metallic abrasives for blast cleaning": GB/T 18838.12002 Surface preparation of steel substrates before coating - Technical requirements - Guidelines and classification of metallic abrasives for blast cleaning (ISO 11124 1:1993,MOD);
G3/T19816.1—2005/IS011125-1:1993 Surface preparation of steel substrates before coating - Test methods for metal abrasives for blast cleaning - Part 1: Sampling (ISO11125-1:193,IDT);
GB/T19816.2—2005/ISO11125-2:1993 Surface preparation of steel substrates before coating - Test methods for metal abrasives for blast cleaning - Part 2: Determination of particle size distribution (IS011125-2:1 993, IDT) GB/T19816.3-2005/1S11125-3:1993 Test method for surface preparation of steel materials before coating Part 3: Determination of hardness (IS011125-3:1993, IDT); GB/T19816.4-2005/TSO71125-4:1993 Test method for surface preparation of steel materials before coating Part 4: Determination of apparent density (IS0)11125-4:1993, ID), Test method for metal abrasives for blast cleaning
Test method for metal abrasives for blast cleaning
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