Method for measuring adherence of a coating on a substrate

Details Method for measuring adherence of a coating on a substrate Method for measuring adherence of a coating on a substrate

G - Physics

01

N

G01N 29/30 (2006.01) G01N 29/11 (2006.01)

Patent

CA 2372711

The invention concerns a method which consists in sensing ultrasonic echoes (L5, L8,...) through the substrate (2) of a test panel (1) and measuring their amplitudes, their decrease being a function of the adherence of a coating (3) deposited on the opposite surface of the substrate (2); preliminary tests on test panels provide a correlation function enabling to eliminate the need to subject the test panels (1) to costly and risky mechanical tests.

Des échos ultrasonores (L5, L8, etc.) à travers le substrat (2) d'une éprouvette (1) sont recueillis et leurs amplitudes sont mesurées, leur décroissance étant une fonction de l'adhérence d'un revêtement (3) déposé sur la face opposée du substrat (2); des essais préliminaires sur des éprouvettes d'étalonnage donnent une fonction de corrélation qui permet de ne plus soumettre les éprouvettes (1) à des essais mécaniques coûteux et incertains.

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