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GB/T 19351-2003 English PDF

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GB/T 19351-2003: Metallic coatings -- Determination of porosity in gold coatings on metal substrates -- Nitric acid vapour test
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 19351-2003English234 Add to Cart 3 days [Need to translate] Metallic coatings -- Determination of porosity in gold coatings on metal substrates -- Nitric acid vapour test Valid GB/T 19351-2003

PDF similar to GB/T 19351-2003


Standard similar to GB/T 19351-2003

GB/T 19355.3   GB/T 19349   GB/T 19350   GB/T 19355.2   GB/T 19355.1   

Basic data

Standard ID GB/T 19351-2003 (GB/T19351-2003)
Description (Translated English) Metallic coatings. Determination of porosity in gold coatings on metal substrates. Nitric acid vapour test
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A29
Classification of International Standard 25.220.20
Word Count Estimation 9,940
Date of Issue 2003-10-29
Date of Implementation 2004-05-01
Adopted Standard ISO 14647-2000, IDT
Regulation (derived from) China Announcement of Newly Approved National Standards No. 14 of 2003 (No. 62 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary 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 <0. 6��m gold overlay, does not apply to the lively than gold or platinum coating, for example, palladium and palladium alloy or flash gilded and its alloys. Several other porosity test methods GB/T 17720 and the literature (for example, references [ 1 ] and [ 2 ]).

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