Metal coating Cd-Ti plating of low hydrogen embrittlement
1 Subject content and applicable scope
This standard specifies the quality inspection requirements, inspection methods and pre-plating inspection requirements for Cd-Ti plating of low hydrogen embrittlement of high strength steel parts.
This standard is applicable to the quality inspection before and after application of Cd-Ti plating of low hydrogen embrittlement of high strength steel parts.
2 Normative references
GB 1238 Designation symbols for metal coatings and chemical treatments
GB 3138 Common terminology of electroplating
GB 4677.6 Test methods for thickness of metal and oxide coating by microscopical examination of cross-section
GB 4955 Metallic coatings - Measurement of coating thickness - Coulometric method by anodic dissolution
GB 4956 Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method
GB 5270 Metallic coatings on metallic substrates; Electrodeposited and chemically deposited coatings; Review of methods available for testing adhesion
GB 6458 Metallic coatings - Neutral salt spray test (NSS test)
GB 6463 Metallic and other non-organic coatings; Review of methods of measurement of thickness
GB 9791 Chromate conversion coatings on zinc and cadmium - Test methods
GB 12609 Electrodeposited metallic coatings and related finishes-Sampling procedures for inspection by attributes
GJB 594 Selection principle and thickness series for metallic and chemical coatings
3 Definitions
3.1 high strength steel
steel with tensile strength greater than or equal to 1,240MPa (127kgf/mm2) after heat treatment in this standard
3.2 main surface
specified surface of parts before and after plating, on which, the plating plays a major role in the appearance and service performance of parts
3.3 minimum local thickness
minimum local thickness measured on the main surface
4 Information
4.1 Essential information
The purchaser shall provide the following information to the supplier:
1 Subject content and applicable scope
2 Normative references
3 Definitions
4 Information
5 Plating marking
6 Acceptance requirements for parts before plating
7 Quality inspection requirements for plating
8 Hydrogen embrittlement performance requirements for plating materials
9 Sampling
10 Test methods
Annex A (Supplement) Analysis method of titanium in Cd-Ti plating
Annex B (Supplement) Processing method of notched permanent specimens
Annex C (Reference) Hydrogen gauge test method
Additional explanation
