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GB/T 19351-2003Metallic coatings -- Determination of porosity in gold coatings on metal substrates -- Nitric acid vapour test (English PDF)

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China

Level / Type

National · Recommended

Issue date

October 29, 2003

Implementation date

May 1, 2004

Scope

GB/T 19351-2003 (Metallic coatings -- Determination of porosity in gold coatings on metal substrates -- Nitric acid vapour test) is available as an English-translated PDF.

GB/T 19351-2003 — This standard specifies the use of nitric acid vapor determination of gold cover, in particular, the electrical contacts on the electrodeposited layer and gold layer porosity of equipment and methods.

This method is intended for explaining the porosity is less than or greater than the experience presented by the user and the application object for a specific number of acceptable values.

This standard applies to gold content �� 75% of the gold layer or a layer of gold, gold content �� 95% of the electrodeposited gold layer or ordinarily used in electrical contacts copper, nickel and its alloys undercoats.

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Document preview — GB/T 19351-2003

National Standard of the People's Republic of China

ICS: 25.220.20
Classification: A 29

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China

What this standard covers1
Document data2

What this standard covers

This standard specifies the use of nitric acid vapor determination of gold cover, in particular, the electrical contacts on the electrodeposited layer and gold layer porosity of equipment and methods. This method is intended for explaining the porosity is less than or greater than the experience presented by the user and the application object for a specific number of acceptable values. This standard applies to gold content � 75% of the gold layer or a layer of gold, gold content � 95% of the electrodeposited gold layer or ordinarily used in electrical contacts copper, nickel and its alloys undercoats. Nitric acid vapor test is too strict and not for thickness

Document data

International classification (ICS): 25.220.20.

Chinese classification (CCS): A29.

Estimated length of the Chinese original: 9,948 words.

Adopted international standard: ISO 14647-2000, IDT.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 38020.2-2019Watchcases and accessories -- Gold alloy coverings -- Part 2: Determination of fineness, thickness, corrosion resistance and adhesion

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