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BS ISO 3160-2:2015 Watch-cases and accessories. Gold alloy coverings - Determination of fineness, thickness, corrosion resistance and adhesion >
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BS ISO 3160-2:2015 Watch-cases and accessories. Gold alloy coverings - Determination of fineness, thickness, corrosion resistance and adhesion, 2015
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 General
- 5 Determination of gold fineness
- 5.1 General
- 5.2 Methods of gold fineness determination
- 6 Determination of thickness
- 7 Determination of the corrosion resistance
- 7.1 Forms of corrosion
- 7.2 Sampling and preparation
- 7.2.1 General
- 7.2.2 Test of finished items (ready-for-use condition)
- 7.2.3 Test of coating process (without passivation treatment)
- 7.2.4 Non-significant surfaces
- 7.3 Continuity of the covering (porosity test)
- 7.3.1 General
- 7.3.2 Test for a copper-containing base metal with or without nickel, and die-cast zinc-based alloys
- 7.3.3 Test a ferrous base metal
- 7.3.4 Non-determination of base metal
- 7.3.5 Testing with nitric acid vapour
- 7.4 Synthetic perspiration test
- 7.4.1 Test vessel
- 7.4.2 Test solution
- 7.4.3 Position of the sample
- 7.4.4 Temperature during the test
- 7.4.5 Duration of the test
- 7.5 Neutral saline mist test
- 7.5.1 General
- 7.5.2 Criteria
- 7.6 Test of the effects of agents containing sulfur
- 7.6.1 Thioacetamide test
- 7.6.2 Flowers of sulfur test in a moist atmosphere
- 8 Adhesion test
- Annex A (normative) Method of obtaining a sample of gold alloy covering
- Annex B (normative) Implementation of the reference methods for the determination of gold alloy coating fineness
- Annex C (normative) Description of the main tests for determination of the thickness of gold alloy coverings
- Bibliography [Go to Page]