Abstract
Evaluation was made on the corrosion resistance of lead and lead alloys (containing each of Bi, Zn, Sn, Sb, Te, Ni, Ag, and Cu) in 50°Bé sulfuric acid by immersion test during a considerably long period. The period required was more than 10 weeks at minimum, especially 25 weeks at optimum.
The change of weight by corrosion with time shown in curves, was classified into the following 3 types.
(1) The resistance was lower than that of pure lead; Alloys containing each of Bi and Zn.
(2) The resistance was almost the same as that of pure lead; Alloys containing each of Sn and Sb (in the limit of solid solution).
(3) The resistance was higher than that of pure lead; Alloys containing each of Te, Sb (over the limit of solid solution), Ni, Ag, and Cu.
