Standard No.:	SJ 20146-1992
English Name:	Generic specification for electrodeposited silver coating
Chinese Name:	银电镀层总规范
Professional Classification:	SJ    Professional Standard - Electronics
Issued by:	CEIC
Issued on:	1992-11-19
Implemented on:	1993-5-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	150.0
Delivery:	via email in 1 business day

1 Scope 1.1 Subject content This Specification specifies all requirements of electrodeposited silver coating. 1.2 Scope of application This Specification is applicable to the electrodeposited silver coating of metallic and nonmetallic workpieces for electronic and electric product. 1.3 Classification 1.3.1 Type Silver coating can be divided into the following three types as required (see 3.3.4 and 6.3): Type I — No brightness Type II — Half brightness Type III — Brightness 1.3.2 Grade Silver coating can be divided into the following two grades as required (see 3.4.7 and 6.1.2): Grade A — With reinforced anti-discoloration treatment (chromate treatment) Grade B — Without reinforced anti-discoloration treatment 2 Normative References GB 1031-83 Surface Roughness Parameters and Their values GB 3131-88 Tin-lead Solder GB 4677.8-84 Test Methods of Plating and Coating Thickness by Beta Backscattering for Printed Boards GB 4955-85 Measurement of Coating Thickness — Coulometric Method by Anodic Dissolution GB 4956-85 Non-magnetic Coatings on Magnetic Substrates — Measurement of Coating Thickness — Magnetic Method GB 6462-86 Metallic and Oxide Coatings — Measurement of Coating Thickness — Microscopical Method GB 9491-88 Liquid Flux for Soldering (Rosin Base) GB 9790-88 Metallic and Related Coatings — Vickers and Knoop Microhardness Tests GB 11378-90 Metallic Coatings — Measurement of Coating Thickness — Profilometric Method GB 12307.1-90 Metallic Coatings — Test Methods for Electrodeposited Silver and Silver Alloy Coatings — Part 1: Determination of Coating Thickness GB/T 13911-92 Expression Methods for Metallic Coating and Chemical Treatment GJB 179-86 Sampling Procedures and Tables for Inspection by Attributes SJ 20147.1-92 Measurement Methods for Electrodeposited Silver and Silver Alloy Coating Thickness — Method by the X-ray Fluorescent Spectromentry SJ 20147.2-92 Determination Methods for Electrodeposited Silver and Silver Alloy Coatings — Determination of the Presencl of Residual Salts 3 Requirements 3.1 Materials Used materials shall be able to produce electrodeposited silver coating in conformity with the requirements of this Specification. 3.2 Coating quality