Aluminum or aluminum alloy article and process

Details Aluminum or aluminum alloy article and process Aluminum or aluminum alloy article and process

1978-07-12

1979-12-04

Rutledge, L. Dewayne

Coating processes

Nonuniform coating

Metal, glass, or ceramic base

148 61, 148 315, 148 115A, 8 25A, 101470, 428469, 427380, 427372R, 427388R, 204 58, 204 38A, 204 35N, B32B 1520, C23F 504

Patent

active

041772997

ABSTRACT:
An object is made out of aluminum or aluminum alloy in a form such as foil, sheet, containers and the like and has a 5 to 25 .mu.m thick oxide layer produced by anodic oxidation. This oxide layer exhibits a crack-free elongation of at least 0.65 parts per thousand in the non-sealed condition and the ratio of the crack-free elongation of the oxide in the non-sealed condition to that in the colored, non-sealed condition lies between 1:1.2 and 1:5.5. Such an object can then be colored by heat-transfer printing without producing hair-line cracks in the oxide layer, which would give the image so produced an unattractive appearance.

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Wernick, S., et al., The Surface Treatment and Finishing of Aluminum and Its Alloys; 3rd Edition; Robert Draper, Ltd., Teddington, pp. 337-342 (1964).

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