Standard No.:	QC/T 625-2013
English Name:	Metallic coatings and conversion coatings for automobiles
Chinese Name:	汽车用涂镀层和化学处理层
Professional Classification:	QC    Professional Standard - Automobile
Issued by:	Ministry of Industry and Information Technology
Issued on:	2013-04-25
Implemented on:	2013-9-1
Status:	superseded
Superseded by:	QC/T 625-2024 Metallic coatings and conversion coatings for automobile
Superseded on:	2025-1-1
Superseding:	QC/T 625-1999 Metallic coatings and conversion coatings for automobile
Language:	English
File Format:	PDF
Word Count:	6500 words
Price(USD):	100.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the requirements, specifications and test methods for metallic coatings and conversion coatings for automobile parts and accessories. This standard is applicable to automobile product design and process design. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method (GB/T 4340.1-2009, ISO 6507-1:2005, MOD) GB/T 4955 Metallic Coating - Measurement of Coating Thickness - Coulometric Method by Anodic Dissolution (GB/T 4955-2005, ISO 2177:2003, IDT) GB/T 4956 Non-magnetic Coatings on Magnetic Substrates - Measurement of Coating Thickness - Magnetic Method (GB/T 4956-2003, ISO 2178:1982, IDT) GB/T 4957 Non-conductive Coatings on Non-magnetic Basis Metals - Measurement of Coating Thickness - Eddy Current (GB/T 4957-2003, ISO 2360:1982, IDT) GB/T 5267.1 Fasteners - Electroplated Coatings (GB/T 5267.1-2002, ISO 4042:1999, IDT) GB/T 5270 Metallic Coatings on Metallic Substrates - Electrodeposited and Chemically Deposited Coatings - Review of Methods Available for Testing Adhesion (GB/T 5270-2005, ISO 2819:1980, IDT) GB/T 6461 Methods for Corrosion Testing of Metallic and Other Inorganic Coatings on Metallic Substrates - Rating of Test Specimens and Manufactured Articles Subjected to Corrosion Tests (GB/T 6461-2002, ISO 10289:1999, IDT) GB/T 8013.1 Anodic Oxide Coating and Organic Polymer Coatings on Aluminium and Its Alloys - Part 1: Anodic Oxide Coatings GB/T 8014.2 Anodizing of Aluminium and Its Alloys - The Measuring Method of Thickness of Anodic Oxide Coatings - Part 2: Mass-loss Method GB/T 9797 Metallic Coatings - Electroplated Coatings of Nickel plus Chromium and of Copper plus Nickel plus Chromium (GB/T 9797-2005, ISO 1456:2003, IDT) GB/T 9798 Metallic Coatings - Electrodeposited Coatings of Nickel (GB/T 9798-2005, ISO 1458:2002, IDT) GB/T 9799 Metallic Coatings - Electroplated Coatings of Zinc on Iron or Steel (GB/T 9799-1997, eqv ISO 2081:1986) GB/T 9800 Chromate Conversion Coatings on Electroplated Zinc and Cadmium Coatings (GB/T 9800-1988, eqv ISO 4520:1981) GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests (GB/T 10125-1997, eqv ISO 9227:1990) GB/T 11376 Phosphate Conversion Coatings for Metals (GB/T 11376-1997, eqv ISO 9717:1990) GB/T 11379 Metallic Coatings - Electroplated Coatings of Chromium for Engineering Purposes (GB/T 11379-2008, ISO 6158:2004, IDT) GB/T 12333 Metallic Coatings - Electroplated Coatings of Copper for Engineering Purposes GB/T 12599 Metallic Coatings - Electroplated Coatings of Tin - Specification and Test Methods (GB/T 12599-2002, ISO 2093:1986, MOD) GB/T 12600 Metallic Coatings - Electroplated Coatings of Nickel Plus Chromium on Plastics Materials (GB/T 12600-2005, ISO 4252:2003, IDT) GB/T 12967.3 Test Methods for Anodic Oxidation Coatings of Aluminium and Aluminium Alloys - Part 3: Copper Accelerated Acetic Acid Salt Spray Test (CASS Test) (GB/T 12967.3-2008, ISO 9227:2006, MOD) GB/T 13912 Metallic Coatings - Hot Dip Galvanized Coatings on Fabricated Iron and Steel Articles - Specifications and Test Methods (GB/T 13912-2002, ISO 1461:1999, MOD) GB/T 15519 Chemical Conversion Coatings - Black Oxide Coating on Iron and Steel - Specification and Test Methods (GB/T 15519-2002, ISO 11408:1999, MOD) QC/T 721 Non-electrolytically Applied Zinc Flake Coatings for Automobile SJ/T 11111 Metallic Coatings - Test Methods for Electrodeposited Silver and Silver Alloy Coatings - Part 1: Determination of Coating Thickness SJ/T 11112 Metallic Coatings - Test Methods for Electrodeposited Silver and Silver Alloy Coatings - Part 2: Adhesion Tests 3 Representation Methods for Coatings and Conversion Coatings for Automobiles Representation methods for metallic coatings and conversion coatings for automobiles are mainly composed of the following three parts:

Foreword i 1 Scope 2 Normative References 3 Representation Methods for Coatings and Conversion Coatings for Automobiles 4 Electroplated Coatings of Copper plus Nickel plus Chromium and of Nickel plus Chromium 5 Electroplated Coating of Zinc 6 Electroplated Coating of Tin 7 Electroplated Coating of Silver 8 Electroplated Coating of Copper 9 Electroplated Coatings of Nickel and of Copper plus Nickel 10 Electroplated Coating of Chromium 11 Electrochemical Oxidation Films of Aluminium and Aluminium Alloys 12 Electroless Coating of Nickel 13 Conversion Coating of Steel and Iron Parts 14 Passivation Coating of Zinc Alloys 15 Electroplated Coating of Lead-Tin Alloy 16 Electroplated Coating of Zinc-Nickel Alloy 17 Electroplated Coating of Zinc-Iron Alloy 18 Vacuum Aluminized Coating 19 Non-electrolytically Applied Zinc Flake Coatings