1.1 This test method describes a procedure for evaluating dry abrasion resistance of a thin hydrophobic or omniphobic coating, or both. The coating is typically less than 100 nm thick and is applied to a planar, glass substrate by application methods including, but not limited to, PVD, dip or spray.
Keywordsabrasion resistance; steel wool; hydrophobic; omniphobic; monolayer film / coating; water contact angle; fingerprint resistance; fingerprint mitigation
With the growth in applications for aesthetically pleasing functional substrates, the use of hydrophobic and omniphobic coatings on a multitude of substrates, and in particular glass, has been growing more ubiquitous. These coatings are used to promote fingerprint resistance, water removal, stain resistance, and easy-clean properties on the surface and enhance that surfaces value. Thus, evaluation of these coatings has become important in several industries. One of the primary ways of comparing these coatings is by determining the coatings ability to remain effective after exposure to environmental abrasion. Evaluating said coatings is carried out via a comparison of the water contact angle (WCA) and the depreciation of that WCA due to exposure to mechanical abrasion. This test standardizes the method by which this is done so that more effective and faster comparisons of these coatings and their components and application methods can be made.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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