GB/T 11379-2008Metallic coatings -- Electroplated coatings of chromium for engineering purposes (English PDF)

Foreword

This standard is identical to ISO 6158.2004 Metallic coatings - Electrodeposited

coatings of chromium for engineering purposes (English version).

This standard was drafted based on the translation of ISO 6158.2004.

For ease of use, this standard has made the following editorial changes.

-- The foreword of the international standard is deleted and the foreword of the

Chinese standard is added;

-- The term "this International Standard" is replaced by "this Standard";

-- The Chinese national standards corresponding to international standards are cited.

This standard replaces GB/T 11379-1989 Metallic coatings - Electroplated coatings of

chromium for engineering purposes. The main changes compared with GB/T 11379-

1989 are as follows.

-- The "Introduction" and "Designation" are added;

-- The requirements for chromium electroplating coatings are modified;

-- The characteristics, application examples and related instructions of chromium

electroplated coatings for engineering purposes are deleted;

-- The typical thicknesses of chromium electroplated coatings for engineering use

are added;

-- The measuring method of shot peening intensity is deleted.

Appendix C of this standard is a normative appendix, and Appendix A and Appendix B

are both informative appendices.

This standard was proposed by China Machinery Industry Federation.

This standard is under the jurisdiction of the National Technical Committee on Metallic

and Non-metallic Coatings of Standardization Administration of China (SAC/TC57).

Drafting organization of this standard. Wuhan Research Institute of Materials

Protection, Guangdong Dazhi Chemical Technology Co., Ltd., Nanjing Jingjing

Surface Technology Co., Ltd., Hangzhou Paradise Umbrella Group Co., Ltd.

Main drafters of this standard. Zhang Dezhong, Mao Zuguo, Cai Zhihua, Jia Jianxin,

Zhang Shengda, Wang Qiwei, He Jie.

Metallic coatings - Electroplated coatings of chromium for

engineering purposes

1 Scope

This Standard specifies requirements for electroplated coatings of chromium, with or

without undercoats, on ferrous and non-ferrous metals for engineering purposes. The

coating designation provides a means of specifying the thickness of chromium

appropriate for typical engineering applications.

2 Normative references

The provisions in the following documents become the provisions of this standard

through reference in this standard. For the dated references, the subsequent amendments

(excluding corrections) or revisions do not apply to this standard, however, parties who

reach an agreement based on this standard are encouraged to study if the latest versions

of these documents are applicable. For undated references, the latest editions of the

referenced documents apply to this standard.

GB/T 3138 Terminology for metallic coating, chemical treatment and related

process (GB/T 3138-1995, neq ISO 2079.1981)

GB/T4955 Metallic coatings - 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 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 6462 Metallic and oxide coatings - Measurement of coating thickness -

Microscopical method (GB/T 6462-2005, ISO 1463.2003, IDT)

GB/T 6463 Metallic and other inorganic coatings - Review of methods of

measurement of thickness (GB/T 6463-2005, ISO 3882.2003, IDT)

GB/T 9790 Metallic and related coatings - Vickers and Knoop microhardness tests

(GB/T 9790-1988, neq ISO 4516.1980)

1400 MPa).

6462 and ISO 15724.