Patent ID: 8372313

Claim:
An electrical-discharge surface-treatment electrode in an electrical-discharge surface-treatment device, comprising: (A) zinc-based powders including at least one of (i) a pure-metal zinc powder and (ii) a surface-oxidized metal zinc powder generated by the surface of the pure-metal zinc powder being oxidized; and (B) zinc-oxide powders whose concentration ranges from 5 to 90 volume percent given that the total composition of the zinc-based powders (A) and the zinc-oxide powders (B) is 100 volume percent, wherein the zinc-oxide powders (B) have a melting point higher than that of the zinc-based powders (A); the zinc-based powders (A) and the zinc-oxide powders (B) being compression-molded to obtain a porosity ranging from 10 to 55 volume percent.