Standard No.:	QC/T 625-2024
English Name:	Metallic coatings and conversion coatings for automobile
Chinese Name:	汽车用涂镀层和化学处理层
Chinese Classification:	T04    Basic standards and general methods
Professional Classification:	QC    Professional Standard - Automobile
Source Content Issued by:	MIIT
Issued on:	2024-07-05
Implemented on:	2025-1-1
Status:	valid
Superseding:	QC/T 625-2013 Metallic coatings and conversion coatings for automobiles
Target Language:	English
File Format:	PDF
Word Count:	8500 words
Translation Price(USD):	255.0
Delivery:	via email in 1 business day

QC/T 625-2024 Metallic coatings and conversion coatings for automobile 1 Scope This document specifies the requirements, technical conditions and test methods for metallic coatings and conversion coatings of automobile parts, components and accessories. This document is applicable to metallic coatings and conversion coatings of automobile parts, components and accessories. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions 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/T 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method GB/T 4955 Metallic coatings - Measurement of coating thickness - Coulometric method by anodic dissolution GB/T 4956 Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method GB/T 4957 Non-conductive coatings on non-magnetic basis metals - Measurement of coating thickness - Eddy current GB/T 5270 Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion 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 8013.1 Anodic oxide coatings 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 and other inorganic coatings - Electrodeposited coatings of nickel, nickel plus chromium, copper plus nickel and of copper plus nickel plus chromium GB/T 9799 Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary treatments on iron or steel GB/T 9800 Chromate conversion coatings on electroplated zinc and cadmium coatings GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests GB/T 11376 Metallic and other inorganic coatings - Phosphate conversion coating of metals GB/T 11379 Metallic coatings - Electroplated coatings of chromium for engineering purposes 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 12600 Metallic coatings - Electroplated coatings of nickel plus chromium on plastics materials GB/T 12967.3 Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 3: Salt spray test GB/T 13912 Metallic coatings - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods GB/T 15519 Chemical conversion coatings - Black oxide coating on iron and steel - Specification and test methods GB/T 16921 Metallic coatings - Measurement of coating thickness - X-ray spectrometric methods GB/T 41950 Metallic coatings - Electroplated coatings of zinc and zinc alloys on iron or steel with supplementary Cr(Ⅵ)-free treatment QC/T 721 Non-electrolytically applied zinc flake coatings for automobile SJ/T 11110 Specification for electrodeposited silver coatings 3 Terms and definitions No terms or definitions are listed in this document. 4 Representation method of metallic coatings and conversion coatings for automobile The representation method of metallic coatings and conversion coatings for automobile mainly consists of the following three parts (see Figure 1).

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Representation method of metallic coatings and conversion coatings for automobile 5 Electroplated coatings of copper plus nickel plus chromium and of nickel plus chromium 6 Electroplated coatings of zinc 7 Electroplated coatings of tin 8 Electroplated coatings of silver 9 Electroplated coatings of copper 10 Electroplated coatings of nickel and of copper plus nickel 11 Electroplated coatings of chromium 12 Electrochemical oxidation coatings of aluminum and aluminum alloys 13 Electroless nickel coatings 14 Conversion coatings of steel parts 15 Passivation coatings of zinc alloy 16 Electroplated coatings of lead-tin alloys 17 Electroplated coatings of zinc-nickel alloys 18 Electroplated coatings of zinc-iron alloys 19 Electroplated coatings of tin-zinc alloys 20 Vacuum aluminum coatings 21 Non-electrolytically applied zinc flake coatings