Corrosion protection for non-amalgamated zinc

摘要

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.