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4. Scratch test results on different materials
Although traditionally used to characterize hard coatings, scratch testing is now commonly employed to characterize a much wider spectrum of materials, ranging from hard materials to soft polymers and even elastomers. Some typical examples from each material category are given here.
4.1 Hard ceramic coverings
In common industrial quality control situations, scratch testing can be used for quick and easy grading of different coatings, to differentiate between small changes in composition that could affect coating integrity and adhesion.
The example in figure 13 shows a comparison...
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Scratch test results on different materials
Conclusions and outlook
Bibliography
Websites
Anton Paar Scratch Testers
http://www.anton-paar.com/corp-en/products/group/scratch-tester/
Standards and norms
- Standard test method for evaluating adhesion by knife, ASTM International - ASTM D6677 -
- Standard test methods for rating adhesion by tape test, ASTM International - ASTM D3359 -
- Standard test method for film hardness by pencil test, ASTM International - ASTM D3363 -
- Standard test method for pull-off strength of coatings using portable adhesion testers, ASTM International - ASTM D4541 - ...
Patents
European Patent EP2065695 Method for analyzing a scratch test (2009)
European Patent EP1092142 Test apparatus and method of measuring mar resistance of film or coaking
European Patent EP16178524.1 Methods for surface evaluation
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