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GB/T 17721-1999Metallic coatings. Porosity tests. Ferroxyl test (English PDF)

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Issued by

State Quality and Technical Supervision

Level / Type

National · Recommended

Issue date

April 8, 1999

Implementation date

September 1, 1999

Scope

GB/T 17721-1999 (Metallic coatings. Porosity tests. Ferroxyl test) is available as an English-translated PDF.

GB/T 17721-1999 — Metallic coatings. Porosity tests. Ferroxyl test

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Document preview — GB/T 17721-1999

National Standard of the People's Republic of China

ICS: 25.220.40
Classification: A 29

Issued by: State Quality and Technical Supervision

What this standard covers1
Document data2
Standards quoted by this document3

What this standard covers

This standard specifies a test of metal covering layer porosity or discontinuous test methods. The covering layer is not obvious effect test of iron cyanide and chloride in the testing process, and takes the shape of the steel substrate of the cathode. This standard is particularly applicable to projects covering layer of chromium.

Document data

International classification (ICS): 25.220.40.

Chinese classification (CCS): A29.

Estimated length of the Chinese original: 6,683 words.

Adopted international standard: ISO 10309-1994, MOD.

Standards quoted by this document

ISO 3696-1987

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.

Referenced standards

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