METHOD FOR NONDESTRUCTIVE TESTING OF COATING ADHESION

Disclosed is a method for applying a consistantly perpendicular minimum tension force to a dolly for testing to see if the adhesive bond strength between a coating and a substrate meets a minimum specification for such bond. The tester comprises a ram passing through an axially centered opening in a...

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Bibliographische Detailangaben
Hauptverfasser:	THOMASON, WILLIAM H, IVIE, RANDALL G
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	Disclosed is a method for applying a consistantly perpendicular minimum tension force to a dolly for testing to see if the adhesive bond strength between a coating and a substrate meets a minimum specification for such bond. The tester comprises a ram passing through an axially centered opening in a dolly bonded to the coating. Piston and cylinder means are associated with the ram and the dolly so that pressure within the piston chamber formed thereby causes the development of a tension force within the dolly which is perpendicular to the coating being tested because of its coaxially centered orientation with respect to the ram. The pressure is increased only to a point wherein the tension force is equal to a minimum specification for bonding adhesion. If the coating has not separated from the substrate, the bond therebetween meets the specification. The testing apparatus may when be removed by causing the bonding means attacking the dolly to the coating to fail as by heating.