ISO 21164-2018 Metallic and other inorganic coatings – Silver coatings by DC magnetron sputtering for engineering use – Measurement of coating adhesion

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ISO 21164-2018 Metallic and other inorganic coatings – Silver coatings by DC magnetron sputtering for engineering use – Measurement of coating adhesion

Silver coatings are often specified for their excellent conductivity in optical, electronic and electrical engineering applications. The minimum thickness of silver coatings for optical and electronic applications ranges from 0.1 μm to 1.0μm, depending on the type of application and customer requirements.

The methods for testing adhesion of Ag coatings deposited by DC magnetron sputtering given in this document are considered to have adequate accuracy when used correctly with specimens suitable for a particular method.

The method chosen shall be the one that is expected to produce the most reliable results taking into account the thickness of the coating, the shape and size of the coating material, the substrate and its roughness, etc.

Warnings This document requires the use of substances and/or procedures that may be hazardous to health if appropriate safety measures are not taken. This document does not address any health hazards, safety or environmental issues associated with its use. The user of this document is responsible for establishing appropriate health, safety and environmentally acceptable practices.

ISO 21164-2018 Metallic and other inorganic coatings – Silver coatings by DC magnetron sputtering for engineering use – Measurement of coating adhesion

1 range
This document specifies the method of testing the coating adhesion of sputtered silver coatings for electrical, electronic, optical and other engineering applications. Engineering applications are defined as applications in which the coating is essentially used for non-decorative purposes.

Although the appearance and suitability of sputtered silver coatings depend on the condition of the substrate, this document does not specify the condition, finish or surface roughness of the substrate prior to deposition. Therefore, it is the Buyer’s responsibility to specify the surface finish and roughness of the base material to meet the product requirements.

This document specifies the test methods for coatings on sheet and flat objects. However, it does not apply to coatings on threads, strips or wires in non-manufactured forms.

2 Normative references

The following files are referenced in the text in such a way that some or all of the content constitutes the requirements of this document. For dated references, citation-only versions apply. For undated references, the latest version of the reference (including any revisions) applies.

ISO 2064, Metallic and other Inorganic coatings – Definitions and practices relating to thickness measurement

ISO 2080, Metallic and other Inorganic coatings — Surface treatments, metallic and other inorganic coatings — Vocabulary

ISO 4521, Metallic and other inorganic coatings – electrolytic silver and silver alloy coatings for engineering use – Specification and test methods

3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 2064, ISO 2080 and ISO 4521 and the following provisions apply.

3.1 Sputtering

Deposition of material (metal) on a surface by spraying particles of material (metal) from a target using fast ions

3.2 Adhesion

The state in which the coating and the underlying substrate are held together by interfacial forces, which may include valence or interlocking forces or both

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