Pitting resistant aluminum alloys

Details Pitting resistant aluminum alloys Pitting resistant aluminum alloys

1983-06-06

1985-02-12

Dean, R.

Alloys or metallic compositions

Aluminum base

Zinc containing

420550, 420551, 420553, 420554, 148437, C22C 2100

Patent

active

044990510

ABSTRACT:
This invention relates to aluminum alloy compositions that have superior pitting corrosion resistance. These compositions include small amounts of manganese, lead, and bismuth, with the major constituent being aluminum. Elements such as titanium, zinc, cobalt, zirconium, and/or boron can also be added. The manganese content ranges from 0.20 to 2 weight percent, the lead content ranges from 0.02 to 0.4 weight percent and the bismuth content ranges from 0.02 to 0.2 weight percent. When included, the zinc content can range from 0.03 to 0.5 weight percent and the titanium content can range from 0.05 to 0.5 weight percent, the cobalt content can range from 0.03 to 0.2 weight percent, the zirconium content can range from 0.03 to 0.5 weight percent, and the boron content can range from 0.03 to 0.1 weight percent.

REFERENCES:
patent: 4069369 (1978-01-01), Fedor et al.

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