PPGI bụ efere nchara mkpuchi (galvanized, aluminized zinc, nickel-plated, wdg) ọgwụgwọ kemịkalụ elu (degreasing, phosphating, chromic acid passivation), wee kpuchie ya na agba, wee sie ngwaahịa.

Uru: o nwere ma n'ibu ike nke ígwè efere na mfe ịkpụzi arụmọrụ, na organic ihe onwunwe nwere ezi ji achọ na corrosion resistance.The mkpuchi nwere ike adhesion na ike na-novel agba ruo ogologo oge.

Ngwa: ọtụtụ ebe na-ewu ụlọ, ngwa ụlọarịa ụlọ, ụlọ ọrụ ọha na njem na ubi ndị ọzọ.