GB/T 47886-2026Metallic and other inorganic coatings - Electrodeposited silver and silver alloy coatings for engineering purposes - Specification and test methods (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is modified to adopt ISO 4521:2008 "Technical Specification for Electroplating of Silver and Silver Alloys for Engineering Use in Metallic and Other Inorganic Coatings".

"and test methods".

This document has undergone the following structural adjustments compared to ISO 4521:2008.

---D.4 corresponds to D.4, D.4.1, D.4.2, and D.4.3 of ISO 4521:2008.

The technical differences between this document and ISO 4521:2008, and the reasons therefor, are as follows.

Chapter 3), GB/T 17720 replaces ISO 10308 (see 6.4), and GB/T 18179 replaces ISO 12687 (see 6.4).

GB/T 19351 replaces ISO 14647 (see 6.4), GB/T 6461 replaces ISO 10289 (see 6.5), and GB/T 19349...

It replaces ISO 9587 (see 6.7), GB/T 19350 replaces ISO 9588 (see 6.8), and GB/T 9790 replaces...

ISO 4516 (see 6.11) and GB/T 2423.28 replace IEC 60068-2-20 (see 6.12), and GB/T 4955 replaces...

ISO 2177 (see A.1) and GB/T 6462 have replaced ISO 1463 (see A.1), and GB/T 20018 has replaced ISO 3543 (see A.1).

B.3.1) GB/T 4956 replaced ISO 2178 (see B.3.2), and GB/T 16921 replaced ISO 3497 (see B.3.3).

GB/T 11378 replaces ISO 4518 (see B.4.3), GB/T 45340 replaces ISO 3868 (see B.4.4), GB/GB/T 12609 replaced ISO 10111 (see B.5.2) and GB/T 12609 replaced ISO 4519 (see Chapter 7) to adapt to my country's national standards.

Technical conditions;

---The normative reference to GB/T 26107 has been deleted, and normative references to HB5067.1 and HB5067.2 (see 6.8) have been added to adapt to...

Based on my country's technological conditions.

The following editorial changes have been made to this document.

---A heading B.4.1 has been added (see B.4.1).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Standardization of Metallic and Non-metallic Coatings (SAC/TC57).

Introduction

Silver and silver alloy electroplating are often used in specific applications due to their excellent electrical conductivity; however, in electrical, electronic, and other applications...

Corrosion resistance is also typically required. In many applications, a sulfide film may form on the plating surface, which increases the contact area of the electroplated silver.

The contact resistance makes it unsuitable for low-voltage electronic circuits. Because sulfides are not completely insulating, they can be used at high voltages and high contact pressures.

Applications of force in various scenarios.

Although this document does not specify requirements for the condition, surface finish, or roughness of the substrate before electroplating, the appearance of silver and silver alloy electroplated layers and Performance still depends on the condition of the substrate. The relevant parties need to reach an agreement based on whether the surface finish and roughness of the substrate material meet the electroplating requirements.

consensus.

Silver and silver alloy electroplating has been used on bearing surfaces for decades, and is particularly suitable for load-bearing surfaces with insufficient lubrication.

Silver alloy plating has largely replaced gold alloy plating on the metal lead frame that supports most silicon chips.

Metallic and other inorganic coatings Engineering silver and silver alloy electroplating Technical specifications and test methods Warning. Some substances and processes described in this document may pose health hazards if appropriate precautions are not taken. This document does not...

There are discussions regarding any health hazards and safety matters and regulations involved in the use of the standard. Users of the standard have a responsibility to establish appropriate and feasible [measures/policies].

Health, safety, and environmental regulations, and take appropriate measures to ensure they comply with national, regional, and international regulations and rules. Compliance with this document does not...

1 Scope

This document specifies the technical requirements and test methods for silver and silver alloy electroplating in electrical, electronic and other engineering applications.

This document applies to non-decorative engineering applications of silver and silver alloy electroplating.

This document does not apply to the plating of threaded parts, nor to the plating of unprocessed sheet metal, strip or wire.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated references are provided.

For this document, only the version corresponding to the specified date applies; for undated references, the latest version (including all amendments) applies.

In this document.

GB/T 2423.28 Environmental testing of electrical and electronic products – Part 2: Test methods – Test T. Soldering (GB/T 2423.28-2005, IEC 60068-2-20:1979, IDT) GB/T 3138 Terminology for surface treatment of metals and other inorganic coatings (GB/T 3138-2015, ISO 2080:2008, IDT) GB/T 4955 Metallic Coatings - Coating Thickness Measurement - Anodic Dissolution Coulometric Method (GB/T 4955-2005, ISO 2177.

2003, IDT)

GB/T 4956 Measurement of Non-Magnetic Coating Thickness on Magnetic Substrates - Magnetic Method (GB/T 4956-2003, ISO) 2178.1982, IDT) GB/T 6461 Rating of specimens and test pieces after corrosion testing of metallic and other inorganic coatings on a metallic substrate (GB/T ISO 10289:1999 (6461-2002, ISO 10289:1999, IDT) GB/T 6462 Microscopic method for measuring the thickness of metal and oxide coatings (GB/T 6462-2005, ISO 1463:2003) IDT) 2021, ISO 4516:2002, IDT) GB/T 11378 Metallic Coatings - Coating Thickness Measurement - Profilometer Method (GB/T 11378-2005, ISO 4518:1980) IDT) GB/T 12609 Sampling inspection procedures for electrodeposited metallic coatings and related finishing (GB/T 12609-1990, ISO) 4519.1980, IDT) GB/T 12334 Definitions and general rules for thickness measurement of metallic and other non-organic coatings (GB/T 12334-2001, ISO 2064:1996, IDT) GB/T 16921 Metallic Coatings - X-ray Spectrometry for Coating Thickness Measurement (GB/T 16921-2005, ISO 3497.