I-PPGI iyipuleti lensimbi elimboziwe (i-galvanized, i-aluminiumized zinc, i-nickel-plated, njll.) ukwelashwa kwamakhemikhali okungaphezulu (ukususa amafutha, i-phosphating, i-chromic acid passivation), bese limbozwa ngopende, bese kuba imikhiqizo ebhakiwe.

Izinzuzo: inamandla okusebenza njengepuleti lensimbi futhi kulula ukuyibumba, kanti izinto eziphilayo zinokumelana okuhle kokuhlobisa nokugqwala. Isembozo sinokunamathela okuqinile futhi singagcina umbala omusha isikhathi eside.

Isicelo: esetshenziswa kabanzi ekwakheni, izinto zasekhayaifenisha, izikhungo zomphakathi kanye nezokuthutha kanye neminye imikhakha.