QC/T 29031-1991Technical specifications for electroplated coatings of automotive engine bearing shells (English PDF)
汽车发动机轴瓦电镀层技术条件
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
October 7, 1991
Implementation date
November 15, 1991
Scope
QC/T 29031-1991 is the English-translated version of 汽车发动机轴瓦电镀层技术条件.
QC/T 29031-1991 is a recommended Chinese automotive industry standard on the electroplated coatings of engine bearing shells.
It specifies the requirements for the plated layer on the friction surface, for the barrier layer beneath it and for the nickel layer, together with the method used to detect corrosion of that surface and the rules for inspection.
The provisions are written for the bearing shells of motor vehicle engines with a cylinder bore of less than 200 mm. The standard falls in class T12 of the Chinese classification, which gathers the engine components of the industry.
It quotes ZB T12 002, HB 5049 and GB 2828. Issued on 7 October 1991, it has applied since 15 November 1991.
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Document preview — QC/T 29031-1991
National Standard of the People's Republic of China
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword
- Scope
- Normative references
- About this standard
- Classification and status
1 Foreword
QC/T 29031-1991 was issued by MIIT on 7 October 1991 and has been in force since 15 November 1991.
2 Scope
This standard is a recommended Chinese automotive industry standard on the electroplated coatings of engine bearing shells. It specifies the requirements for the plated layer on the friction surface, for the barrier layer beneath it and for the nickel layer, together with the method used to detect corrosion of that surface and the rules for inspection. The provisions are written for the bearing shells of motor vehicle engines with a cylinder bore of less than 200 mm. The standard falls in class T12 of the Chinese classification, which gathers the engine components of the industry. It quotes ZB T12 002, HB 5049 and GB 2828.
3 Normative references
QC/T 29031-1991 cites the following standards, which apply in full or in part through the references made to them in its clauses.
HB 5049
GB 2828
4 About this standard
Issued by: MIIT
English translation: about 15 pages
5 Classification and status
Prefix QC/T: recommended standard.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
HB 5049 · GB 2828
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