Preparation of steel substrates before application of paints and related products—Specifications for non-metallic blast-cleaning abrasives—Part 11:Special type grit of steel slag

GB/T 17850.11-2011 Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating Part 11: Steel slag special sand GB/T17850.11-2011 |tt||Standard compression package decompression password: www.bzxz.net
This part of GB/T17850 specifies the particle size range, apparent density, Mohs hardness, water content, conductivity of water extract, water-soluble chloride content and particle adsorbent content of steel slag special sand abrasives for blast cleaning. The requirements specified in this part are only applicable to unused abrasives and not to used abrasives. For the test methods of non-metallic abrasives for blast cleaning, see GB/T17849.
GB/T17850 "Technical requirements for non-metallic abrasives for blast cleaning of steel surfaces before coating" is divided into the following parts:
———Part 1: Guidelines and classification;
———Part 2: Silica sand;
———Part 3: Copper refining slag;
———Part 4: Coal furnace slag;
———Part 5: Nickel refining slag;
———Part 6: Ironmaking slag;
———Part 7: Molten alumina;
———Part 8: Olivine sand;
———Part 9: Staurolite;
———Part 10: Garnet;
———Part 11: Steel slag special sand.
This part is Part 11 of GB/T17850.
This part was drafted in accordance with the rules given in GB/T1.1-2009.
This part was proposed by China State Shipbuilding Corporation.
This part is under the jurisdiction of the Sub-Technical Committee on Metal Surface Treatment and Painting Technology before Painting of the National Technical Committee for Standardization of Paints and Pigments (SAC/TC5/SC6). The
drafting units of this part: China Shipbuilding Industry 11th Research Institute, China Shipbuilding Industry Comprehensive Technology and Economic Research Institute, MCC Baosteel Technology Services Co., Ltd.
The main drafters of this part: Fu Jianhua, Song Yanyuan, Li Li, Jiang Feng, Cao Chunguang, Zhang Jian, Jin Qiang, Yang Gang, Han Yi, Su Jian, Wang Youqin.
The following documents are indispensable for the application of this document. For any dated referenced document, only the dated version applies to this document. For any undated referenced document, its latest version (including all amendments) applies to this document.
GB/T17849 Test method for non-metallic abrasives used for blast cleaning of steel surfaces before coating (ISO11127-1~ISO11127-7)

ICS 25. 220. 10
National Standard of the People's Republic of China
GB/T17850.11—2011
Surface preparation of steel substrates before application of paints and related products-Specifications for non-metallic blast-cleaning abrasivesPart 11:Special type grit of steel slag2011-12-30 Issued
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 June 1, 2012
GB/T 17850.11—2011
GB/T17850 "Technical requirements for non-metallic materials for blast cleaning of steel surface treatment before coating" is divided into the following parts: Part 1: Guidelines and classification; Part 2: Silica sand; Part 3: Copper refining slag; Part 4: Coal furnace slag; Part 5: Bronzing slag; Part 6: Ironmaking furnace; Part 7: Molten alumina; Part 8: Peridot sand, Part 9: Staurolite; Part 10: Garnet; Part 11: Steel slag special sand.
This part is Part 11 of GB/T 17850. This part was drafted in accordance with the rules given in GB/T1.12009. This part was proposed by China State Shipbuilding Corporation: This part is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments, Surface Treatment before Painting and Painting Technology Sub-Committee (SAC/TC 5/SC 6).
The drafting units of this part are: China Shipbuilding Industry 11th Research Institute, China Shipbuilding Industry Comprehensive Technology and Economic Research Institute, MCC Baosteel Technology Service Co., Ltd.
The main drafters of this part are: Fu Jianhua, Song Yanyuan, Li Li, Jiang Feng, Cao Jianguang, Zhang Jian, Jin Qiang, Yang Gang, Han Yi, Su Jian, Wang Youqin. TTTKONYKAA
Surface treatment of steel before coating
Technical requirements for non-metallic abrasives for blast cleaning Part 1: Special sands made of steel slag
GB/T 17850.112011
Warning: Equipment, materials and abrasives used for surface treatment may be dangerous if not used with care. Many countries have regulations for materials and materials that are considered dangerous during use or after use (abdominal treatment), such as free silica, carcinogens or substances. Therefore, these regulations should be followed. It is important to ensure that appropriate guidance is given and all required precautions are implemented. 1 Scope
This part of GB/T17850 specifies the particle size range, apparent density, Mohs hardness, water content, conductivity of ice extract, water-soluble chloride content and particle adsorbent content of special sands made of steel slag for blast cleaning. The requirements specified in this section apply only to unused abrasives and not to used abrasives. For the test methods of non-metallic abrasives for blast cleaning, see GB/T 17849. 2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 17849 Surface treatment of steel before coating Test methods for non-metallic abrasives for blast cleaning (ISO 11127-1 to ISO 11127-7)
3 Terms and definitions
The following terms and definitions are used in this document.
Special type grit of steel slag A synthetic mineral non-metallic abrasive for blast cleaning, made from slag obtained from smelting steel, after primary granulation, drying, sieving, with or without mechanical crushing. The main components are calcium silicate, calcium ferrite and RO phase (monovalent metal oxide solid solution). 3. 2
Particle adsorptlon tontentThe proportion of powder particles adsorbed on the surface of steel slag special sand to the total mass of sand particles. 4 Abrasive marking
Steel slag special sand abrasive should be marked with "*abrasive GB/T 17850" and the abbreviation \N/SFF\ representing non-metallic steel slag special sand abrasive, followed by the symbol \G\ for the particle shape required to be purchased, and finally the particle size range number expressed in millimeters (see Table 1).
Example:
Abrasive GB/T 17B50N/SFE/G 0.5-1.01
TTTKAONYKACA
GB/T 17850.11—2011
Indicates non-full screen steel special sand material, to meet the requirements of this part of GB/T17850, the initial particle shape is sand, the particle size range is 0.5mm~1.0mm.
It is necessary to mark this complete product mark on the order form. Table 1 Particle size distribution
Particle size range/
Sieve size/
Strong retention/
% (mass disc fraction)
Sieve size/
Residue/bzxZ.net
% (mass disc fraction)
Sieve size7
Through amount/
% (mass disc fraction)
0. 2~0. 5 0. 2 ~1. 00, 2 ~1. 4]0. 2~2. 00, 2~2, 8j0. 5~1. 0|0. 5-~1, 441,0~2.0 1,4-~2.8
, according to the agreement between the supply and demand parties, the materials of different size ranges can be combined, and the ratio of small, super small and normal size particles should be specified in detail. The maximum particle size should not exceed 3.15mm, and the proportion of particles smaller than 0.2mm should not exceed 5% (quality distribution). 5 Sampling
Sampling shall be carried out in accordance with the provisions of GB/T17849.
6 Requirements
6. 1 General requirements
6.1.1 Boiler slag special sand abrasive should be a glassy amorphous material and can be recycled multiple times according to actual conditions. 6.1.2 The silicon in steel slag special sand should exist in the form of chain silicate. The free crystalline silicon (such as quartz, triangular stone, and square stone) content determined by X-ray diffraction method should not exceed 1% (mass fraction). Note: X-ray radiography can refer to IS0 24095, 2009, Measurement Guide for Inhalable Crystalline Silica in Workplace Air or 1Y/T 009-1996 Rotating Target Polycrystalline X-ray Diffraction Method -6.1.3 Steel slag special abrasives shall be free of corrosive components or contaminants that damage adhesion. Note: Steel slag special abrasives are mainly supplied in angular shapes. More rounded particles are not excluded, because their effect on surface roughness is usually consistent with the effect of treatment with more angular particles. 6.2 Performance Requirements
The main performance indicators of steel slag special abrasives shall be as specified in Table 2. 2
TTT KANTKACA
Topic Particle size small range and distribution
Particle adsorption yellow content/% (mass fraction) Apparent density/(kg/ru*)
Moore's hardness
Water content/% (pregnancy fraction)
Electrical conductivity obtained by water immersion/(mS/m)
Aqueous fluoride/treatment (mass fraction)
Table 2 Main performance indicators of steel-suitable special sand abrasives
See Table 1
(3 3~3. 9) ×10
0,0025
, according to the negotiation between supply and demand, another method of evaluating hardness with appropriate minimum requirements can also be used. 7 Test methods
CB/T 17B50.11—2011
Test methods
GB/T 17849
Appendix A
GB/T 17849
The particle size range, apparent density, Mohs hardness, water content, conductivity of water leaching solution and water-soluble oxides of special steel slag abrasives shall be determined in accordance with the provisions of GB/T17849, and the particle adsorbent content shall be determined in accordance with Appendix A. The results shall comply with 6.2.
8 Marking and Identification
All supplies shall be clearly marked or identified, either directly or together with the shipping order, in accordance with the provisions of Chapter 4. 9 Information to be provided by the manufacturer or supplier
When necessary, the manufacturer or supplier shall provide a test report detailing the results of the relevant properties measured by the methods specified in Table 2. GB/T 17850.11—2011 A.1 Instruments and equipment Appendix A (Normative Appendix) Determination of particle adsorbent content The main instruments and equipment for the particle adsorbent content determination test include: a) Oven: temperature can be controlled within the range of (105 ± 5) °C Balance: sensitivity 0.01 mm c) Sieve: aperture 0.2 mm el) Washing container: when washing the sample, keep the sample from splashing; e) Porcelain plate, brush, etc. A.2 Test steps Take about 1 100 cm of the sample in its original state, move it into a porcelain plate and flatten it, put it into an oven at 110 °C for drying for 1 h, and cool it to room temperature.
A.2.2 Weigh two portions of 500 g sample (m2) to an accuracy of 0.01 g. A.2.3 Place the sample in a washing container. Pour clean water so that the water level is about 150 mm above the sample surface. Then stir thoroughly and soak for 2 h. A.2.4 Wash by hand or with tools, and pour the deep water in the porcelain container into a 0.2 mm sieve to filter out particles smaller than 0.2 m2. A.2.5 Repeat A.2.3 until the water in the washing container becomes clear. A.2.6 Place the washed sample in a porcelain dish and dry for 3 h. A.2.7 Weigh the sample (m2) to an accuracy of 0.01 g. A.3 Calculation of results
A.3.1 Calculate the adsorbed matter content of the particle according to formula (A.1) to an accuracy of 0.01%. m2. ml×100%
Where:
Particle adsorbent content, unit is % (mass fraction); -The mass of the dried sample before the test, unit is gram (g), m1The mass of the dried sample after the test, unit is gram (g). -(A.1)
4.3.2 The test result is the average of two measurements. If the difference between the two measurement results exceeds 0.05%, the test should be repeated. TTTKONYKAA
1107100821 /5
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