Njengoba izingxenye ugqinsi kwakheka phezu, izingxenye aminyene futhi eziyinkimbinkimbi esikalini, izingxenye ezinjalo pickling descaling kuqhathaniswa eziyinkimbinkimbi. Ukususwa okunjalo kwesikali se-oxide esixekethile ngokwesinyathelo sokukhetha sokususa umlotha owenziwe.

1, Isikali esixegayo:
2, Ukusebenza kokukhetha: ngemva kwesikali esixekethile, ngokuvamile esinamathiselwe ezingxenyeni zongqimba olumpunga olulengayo, umlotha olengayo ngemva kokukhipha i-oxide passivation.
3, Ukususwa kwesinyathelo sokusebenza sokulenga umlotha: Izingxenye ngemva kwenqubo yokugqwala i-pickling passivation ukumelana nokugqwala emoyeni, njengokuchayeka emoyeni, izingxenye zokugqwala komhlabathi. Ukuze kuthuthukiswe ukumelana nokugqwala kwezingxenye, izingxenye kufanele zenze indawo eminyene, ukumelana nokugqwala okuhle kwefilimu engenzi lutho, ukuze kufezwe inhloso yokumelana nokugqwala. Ifilimu ye-Passivation yinhle noma imbi izothinta ngqo ikhwalithi yempilo kanye nezingxenye zokubukeka, izici ezithinta ikhwalithi yokwakheka kwefilimu ye-passivation kanye nekhwalithi yezinto eziyinhloko zesisombululo se-passivation.