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GB/T 40793-2021: Nonmetallic coatings for sintered neodymium iron boron permanent magnets
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 40793-2021 | English | 279 |
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Nonmetallic coatings for sintered neodymium iron boron permanent magnets
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GB/T 40793-2021
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Basic data | Standard ID | GB/T 40793-2021 (GB/T40793-2021) | | Description (Translated English) | Nonmetallic coatings for sintered neodymium iron boron permanent magnets | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H65 | | Word Count Estimation | 14,166 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40793-2021: Nonmetallic coatings for sintered neodymium iron boron permanent magnets---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Nonmetallic coatings for sintered neodymium iron boron permanent magnets
ICS 77.120.99
CCSH65
National Standards of People's Republic of China
Sintered NdFeB surface coating
Released on 2021-10-11
2022-05-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229).
Drafting organizations of this document. Ningbo Yunsheng Co., Ltd., Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Beijing Zhongke Sanhuan
High Technology Co., Ltd., Central Iron and Steel Research Institute, Research Rare Earth New Materials Co., Ltd., Anhui Dadixiong New Materials Co., Ltd.,
Fujian Changting Jinlong Rare Earth Co., Ltd., Baotou Rare Earth Research Institute, Ningbo Jintan Magnetic Industry Co., Ltd., Ganzhou Fuerte Electronics Co., Ltd.
Company, China North Rare Earth (Group) High-Tech Co., Ltd., Beijing Goldwind Kechuang Wind Power Equipment Co., Ltd.
The main drafters of this document. Song Zhenlun, Hu Yiqun, Jiang Jianjun, Shen Guodi, Zhang Min, Yang Lijing, Jin Guoshun, Jiang Bing, Zhang Jiulei, Zhu Minggang,
Fu Jianlong, Chen Jingwu, Huang Xiulian, Lin Jianqiang, Qi Zhiqi, Yan Wenlong, Song Quan, Sun Guangjie.
Sintered NdFeB surface coating
1 Scope
This document specifies the code of sintered NdFeB surface coating, the requirements of the substrate and the preparation before coating, technical requirements, test methods and inspections
rule.
This document applies to protective and decorative coatings on the surface of sintered NdFeB permanent magnets, including phosphating or zirconium conversion coatings, electrophoresis and spray coatings.
Coating, chemical vapor deposition and other coatings.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 2423.22-2012 Environmental Test Part 2.Test Method Test N. Temperature Change
GB/T 2423.50 Environmental Test Part 2.Test Method Test Cy. Constant damp heat is mainly used for accelerated test of components
GB/T 3138 Terminology for surface treatment of metal and other inorganic coatings
GB/T 6739 Paint and varnish pencil method for determination of paint film hardness
GB/T 6807 Technical conditions for phosphating treatment of steel workpieces before coating
GB/T 8264 Coating Technical Terms
GB/T 9286 Cross-cut test of paint and varnish film
GB/T 10125 Artificial atmosphere corrosion test salt spray test
GB/T 13452.2-2008 Determination of paint film thickness of paints and varnishes
GB/T 34491 Sintered NdFeB surface coating
GB/T 39494-2020 Determination of the binding force of the surface coating of the rare earth permanent magnet material for the drive motor of the new energy vehicle
QB/T 3814 Appearance quality test method of metal coating and chemical treatment layer of light industrial products
3 Terms and definitions
The terms and definitions defined in GB/T 3138, GB/T 8264 and GB/T 34491 apply to this document.
4 Coating code
4.1 Conversion Coating Code
Phosphate conversion coating is represented by PH, and zirconium conversion coating is represented by ZR.
4.2 Non-conversion film coating code
4.2.1 The coating code includes 4 parts, in order. coating symbol, coating color and category, coating thickness and coating process.
Examples are as follows.
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