Method for nondestructive testing of coating adhesion

Patent 4606225 Issued on August 19, 1986. Estimated Expiration Date:

November 7, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2711775

3527093

3577775

3628378

3821892

Composition for removing cyanoacrylate adhesives from surfaces
Patent #: 4381248
Issued on: 04/26/1983
Inventor: Lazar

Coating adhesion testing
Patent #: 4413510
Issued on: 11/08/1983
Inventor: McCusker , et al.

Method and apparatus for removing protective coating from pipe section Patent #: 4487643
Issued on: 12/11/1984
Inventor: Ellett

Inventors

Application

No. 06/669127 filed on 11/07/1984

US Classes:

73/150A, Bond strength73/827Bond test

Examiners

Primary: Frankfort, Charles E.
Assistant: Worth, W. Morris

Attorney, Agent or Firm

Littlefield; Stephen A.

International Classes

G01N 19/04 (20060101)
G01N 19/00 (20060101)

Abstract

A method of coating testing comprises 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. A piston and cylinder 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 the coaxially centered orientation of the dolly 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 then be removed by causing the bonding agent attaching the dolly to the coating to fail as by heating.