ISO 3160-2:2015 PDF

Name: ISO 3160-2:2015 — Watch-cases and accessories — Gold alloy coverings — Part 2: Determination of fineness, thickness, corrosion resistance and adhesion
SKU: ISO 3160-2:2015
Price: 25 EUR
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Watch-cases and accessories — Gold alloy coverings — Part 2: Determination of fineness, thickness, corrosion resistance and adhesion

Название (английский):

ISO 3160-2:2015

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

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 10 декабря 2015 г.
Издание:: ISO IS 3160 edition 4 version 1
ICS:: 39.040.10

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Описание (английский):

ISO 3160-2:2015 specifies methods to determine fineness, thickness, corrosion resistance and adhesion for gold alloy coverings on watch-cases and accessories, including bracelets when they are permanently attached to the case. The tests apply only to significant surfaces. ISO 3160-2:2015 applies to all gold alloy coverings specified in ISO 3160‑1.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3160-2:2015 - "Watch-cases and accessories - Gold alloy coverings - Part 2" specifies standardized test methods to determine fineness, thickness, corrosion resistance and adhesion of gold-alloy coverings applied to watch-cases and accessories (including bracelets permanently attached to the case). Tests apply to significant surfaces (surfaces essential to appearance/serviceability) and to all gold alloy coverings defined in ISO 3160‑1. The document defines reference methods for arbitration and sets accuracy expectations for laboratory and production testing.

Key topics and requirements

Scope and applicability

Covers gold-alloy coatings on watch components and attached bracelets; tests are destructive and apply to significant surfaces only.

Fineness (gold content)

Multiple acceptable analytical methods: chemical reduction, cupellation (fire assay), SEM/EDS, atomic absorption, spectrophotometry, X‑ray (ISO 3497), ICP, touchstone (approximate) and others.
Reference methods for arbitration: cupellation and SEM/EDS.
Required analytical accuracy: indication within ±50 parts per thousand.

Thickness measurement

Accepted techniques include microsection (ISO 1463), coulometric anodic dissolution (ISO 2177), beta backscatter (ISO 3543), X‑ray fluorescence (ISO 3497), SEM (ISO 9220), Fizeau interferometry (ISO 3868) and others.
Measurement accuracy targeted at ±10%. Microsection is the arbitration method for local thickness.

Corrosion resistance and porosity

Identifies three corrosion forms: base metal attack at coating gaps, saline/mildly acidic attack (e.g., perspiration), and sulfur-containing agent attack (tarnishing).
Standardized tests include porosity/continuity checks, synthetic perspiration, neutral salt-spray, thioacetamide and flowers-of-sulfur tests, and nitric acid vapour where applicable.

Adhesion

Procedures and criteria for adhesion testing to verify coating durability on substrates.

Sampling and preparation

Annexes detail sample separation and implementation of reference methods.

Practical applications and users

Watch and jewellery manufacturers - quality control and compliance with ISO 3160‑1 requirements.

Plating shops and coatings suppliers - process qualification, batch acceptance and supplier-customer agreements.

Independent testing and metrology laboratories - routine and arbitration testing (cupellation, SEM/EDS, microsection).

Product designers and material engineers - selection of coatings and corrosion-resistant finishes.

Regulatory bodies and buyers - specification verification for gold alloy content and durability.

Related standards

Keywords: ISO 3160-2:2015, gold alloy coverings, watch-cases, fineness determination, coating thickness, corrosion resistance tests, adhesion testing, watch industry quality control.

ISO 3160-2:2015 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications and users

Related standards

Технические детали

ISO 3160-1:1998/Amd 1:2000

Watch-cases and accessories — Gold alloy coverings — Part 1: General requirements — Amendment 1

SIST EN ISO 3497:2002

Metallic coatings - Measurement of coating thickness - X-ray spectrometric methods (ISO 3497:2000)

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SIST EN ISO 3543:2002/AC:2006

Metallic and non-metallic coatings - Measurement of thickness - Beta backscatter method (ISO 3543:2000/Cor.1:…

SIST EN ISO 9220:2022

Metallic coatings - Measurement of coating thickness - Scanning electron microscope method (ISO 9220:2022)

SIST EN ISO 3868:1999

Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interfero…