Corrosion protection for non-amalgamated zinc

Details Corrosion protection for non-amalgamated zinc Corrosion protection for non-amalgamated zinc

1982-06-14

1983-09-13

Gluck, Irwin

Compositions

Compositions containing a single chemical reactant or plural...

429219, 429229, H01M 426, H01M 438, H01M 442, H01M 454

Patent

active

044041179

ABSTRACT:
A pseudo-passive anode zinc is obtained by doping ultra-pure Zn powder with 0.1 to 0.6% by weight Ag from a silver thiosulfate solution, and then exposing it at elevated temperature to a zincate-containing hydroxide. This exhibits a lower corrosion rate than ultra-pure zinc by itself. The anodic load capacity of the doped zinc approaches that of active zinc, and the tendency towards reactivation after anodic current loading is significantly reduced.

REFERENCES:
patent: 3926672 (1975-12-01), Curelop et al.
patent: 4125689 (1978-11-01), Jumel
patent: 4167609 (1979-09-01), Scarr
patent: 4307164 (1981-12-01), Church et al.
patent: 4358390 (1982-11-01), Coulombeau

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