Method and apparatus for wear testing anodized surfaces

Details Method and apparatus for wear testing anodized surfaces Method and apparatus for wear testing anodized surfaces

1989-12-21

1990-09-25

Raevis, Robert

Measuring and testing

By abrasion, milling, rubbing, or scuffing

G01N 356

Patent

active

049585118

ABSTRACT:
An anodized aluminum part is wear tested by forcing a ball point stylus against the part and rotating the part about an axis spaced from the stylus. A turntable driven by a motor rotates the part at a desired speed. Weights are used to determine the force on the stylus. A layer of nonconductive oil on the test area helps clear wear debris from the circular wear path due to the motion of the ball through the oil. An ohm meter is connected between the stylus and the aluminum substrate to monitor electrical continuity and thus detect when the stylus wears through the anodized coating. The time required to achieve the wear through is a measure of the wear resistance of the coating.

REFERENCES:
patent: 2414439 (1947-01-01), Brandon
patent: 2962890 (1960-12-01), Borrino
patent: 3041868 (1962-07-01), Schaschl et al.
patent: 3834219 (1974-09-01), Brauer
patent: 4791807 (1988-12-01), Oechsle
patent: 4864852 (1989-09-01), Boone
Paper entitled "Measurement of Hardness, Wear Index and Abrasion Resistance of Anodic Coatings on Aluminium" by R. W. Thomas, The British Aluminium Co., Ltd., Gerrards Cross, Buckinghamshire, 1981.

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