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 ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 19351-2003	234	Add to Cart	3 days	Metallic coatings -- Determination of porosity in gold coatings on metal substrates -- Nitric acid vapour test	Valid

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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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