GB/T 38020.2-2019 Active National standards

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

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

Publish Date: 2019-08-30 Implement Date: 2020-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 38020.2-2019

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Clocks and watches

ICS Name: \nWatch

Publish Date: 2019-08-30

Implement Date: 2020-03-01

Pages: 15 pages

Scope

This part of GB/T 38020 specifies the testing methods for the purity, thickness, corrosion resistance, and adhesion of gold alloy coatings on watch cases and their accessories, including watchbands that cannot be removed from the watch case.
The tests in this part are only applicable to effective surfaces.
This part applies to all gold alloy coatings specified in GB/T 38020.1.

Development Information

Word Count: 28 Thousand words Pages: 15 pages

Same series standard

GB/T 38020.1-2019 Watch-cases and accessories—Gold alloy coverings—Part 1:General requirements

Referenced Standards

ISO 3868 ISO 4538 ISO 27874 GB/T 4955-1997 Metallic coatings—Measurement of coating thickness—Coulometric method by anodic dissolution GB/T 4955-2005 Metallic coatings—Measurement of coating thickness—Coulometric method by anodic dissolution GB/T 6462-1986 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method GB/T 6462-2005 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method GB/T 9288-1998 Analyse method of gold content in jewellery GB/T 9288-2006 Gold jewellery alloys—Determination of gold—Cupellation method (fire assay) GB/T 9288-2019 Gold jewellery alloys—Determination of gold—Cupellation method(fire assay) GB/T 10125-1997 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2012 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2021 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 16921-1997 Measurement of metallic coating thickness X—ray spectrometric methods GB/T 16921-2005 Metallic coatings—Measurement of coating thickness—X-ray spectrometric methods GB/T 18043-2000 Precious metal jewellery content non-damaged test method—X-ray fluorescence spectrometry GB/T 18043-2008 Jewellery—Determination of precious metal content—Method using X-Ray fluorescence spectrometry GB/T 18043-2013 Jewellery—Determination of precious metal content—Method using X-Ray fluorescence spectrometry GB/T 18179-2000 Metallic coatings—Porosity tests—Humid sulfur(flowers of sulfur) test GB/T 19351-2003 Metallic coatings-Determination of porosity in gold coatings on metal substrates-Nitric acid vapour test GB/T 20018-2005 Metallic and non-metallic coatings—Measurement of thickness—Beta backscatter methods GB/T 31563-2015 Metallic coatings—Measurement of coating thickness—Scanning electron microscope method GB/T 38020.1-2019 Watch-cases and accessories—Gold alloy coverings—Part 1:General requirements GB/T 6462-2025 Metallic and oxide coatings—Measurement of coating thinckness—Microscopical method

Adopt standards

ISO 3160-2:2015

Related Standards

GB/T 6877-1986 Replaced

GB/T 6877-1986 Classification, terminology and numbering for parts and assemblies of the mechanical time measuring instruments Classification, terminology and numbering for parts and assemblies of wrist watches and lever escapement alarm olocks

Publish Date: 1986-09-13

GB/T 18828-2002 Replaced

GB/T 18828-2002 Diver's watches

Publish Date: 2002-09-05

GB/T 6044-2005 Replaced

GB/T 6044-2005 Analogue quartz watches

Publish Date: 2005-09-26

GB/T 20215-2006 Active

GB/T 20215-2006 Timekeeping instrument—Wristwatch-cases—Fixing dimensions of non-spring-bar types

Publish Date: 2006-03-10

GB/T 4048-2008 Active

GB/T 4048-2008 Timekeeping instruments—Wristwatches—Dimensions of bracelet-to-case fastening elements

Publish Date: 2008-07-31

GB/T 6877-2008 Active

GB/T 6877-2008 Classification,terminology and numbering for parts and assemblies of the time measuring instruments—Classification,terminology and numbering for parts and assemblies of mechanical wrist watch movements

Publish Date: 2008-07-31