Aluminum alloy member superior in corrosion resistance and...

Details Aluminum alloy member superior in corrosion resistance and... Aluminum alloy member superior in corrosion resistance and...

2006-02-28

2006-02-28

Xu, Ling (Department: 1775)

Stock material or miscellaneous articles

Composite

Of metal

C428S701000, C428S702000, C428S699000, C428S469000, C428S446000, C428S650000, C428S640000, C428S304400

Reexamination Certificate

active

07005194

ABSTRACT:
An aluminum or aluminum alloy member superior in liquid and gaseous corrosion resistance and plasma resistance, which has an anodized film formed thereon which is composed of a porous layer and a non-porous barrier layer whose structure is at least partly boehmite or pseudo-boehmite. Said anodized film is characterized by that the film dissolving rate measured by the test for immersion in a mixture of phosphoric acid and chromic acid (conforming to JIS H8683-2) is less than 120 mg/dm2/15 min, the ratio of area in which corrosion occurs after standing for 2 hours in an atmosphere of argon containing 5% chlorine (at 300° C.) is less than 15%, and the hardness (Hv) of the film is no lower than 420.

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Translation of JP-2000-064092.

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