GB/T 9797-2022 in English
VALIDMetallic and other inorganic coatings—Electrodeposited coatings of nickel，nickel plus chromium, copper plus nickel and of copper plus nickel plus chromium
- Issued on:2022-10-12
- Implemented on:2023-05-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
《GB/T 9797-2022金属及其他无机覆盖层 镍、镍+铬、铜+镍和铜+镍+铬电镀层》由TC57（全国金属与非金属覆盖层标准化技术委员会）归口，TC57SC1（全国金属与非金属覆盖层标准化技术委员会电镀与精饰分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the core content of the standard
This standard integrates GB/T 9797-2005 and GB/T 9798-2005, adds the microcrack chromium plating type and STEP test method, and strengthens the potential difference requirements for multi-layer nickel plating.
Comparison of coating technology requirements
| Project | 2005 Edition | 2022 Edition |
|---|---|---|
| Nickel layer type | Type 4 | Type 5 (new high-sulfur nickel without mechanical polishing) |
| Chromium layer thickness | 0.3μm | Micro-crack chromium minimum 0.5μm |
| Potential difference requirement | Unspecified | Double-layer nickel 80-150mV |
Key measurement methods
Thickness measurement: The coulometric method (GB/T 4955) and microscope method (GB/T 6462) are preferred, and the X-ray method (GB/T 16921) is suitable for online detection.
Pore detection: Microporous chromium needs to be verified by the copper sulfate constant pressure test (Appendix C), requiring ≥10,000 pores/cm².
Implementation recommendations
- High-strength steel parts (≥1000MPa) must be subjected to stress relief before plating (GB/T 19349) and dehydrogenation treatment after plating (GB/T 19350)
- The copper base thickness of complex workpieces is recommended to be increased to 15μm to ensure coverage
- The risk of gloss loss of micro-crack chromium plating is higher, and the thickness can be increased to 0.8μm to delay failure
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 19822-2024 in English
Specification for hard anodic oxidation coatings on aluminium and its alloys
2024-06-29 -
GB 9800-1988 in English
Chromate conversion coatings on electroplated zinc and cadmium coatings
1988-09-05 -
GB/T 26106-2010 in English
Mechanically deposited coatings of zinc—Specification and test methods
2011-01-10 -
GB/T 13744-1992 in English
measurement of coating thickness for electrodeposited nickel coatings on magnetic and non - Magnetic substracts
1992-01-01 -
GB/T 17461-1998 in English
Metallic coatings--Electroplated coatings of tin-lead alloys
1998-08-12 -
GB/T 11379-2008 in English
Metallic coatings—Electroplated coatings of chromium for engineering purposes
2008-06-19 -
GB/T 34625-2017 in English
Metallic and other inorganic coatings-Electrodeposited gold and gold alloy coatings for electrical,electronic and engineering purposes-Specification and test methods
2017-10-14 -
GB/T 24916-2010 in English
Surface treatment solution—Determination of metal element contents—Inductively coupled plasma atomic emission spectrometric method
2010-08-09 -
GB/T 6465-2008 in English
Metallic and other non-organic coatings - Corrodkote corrosion test (CORR test)
2008-06-19
