1.Mgbe ájá gbawara ma ọ bụ ntuziaka n'ibu derusting na-eji, na metal ọnụ ọgụgụ n'elu nkennukwu dayameta ígwè ọkpọkọ na-ekpughere ya ozugbo na ikuku n'ihi peeling nke ọnụ ọgụgụ oxide site na nnukwu ọkpọkọ ígwè.Ọ bụrụ na a naghị ese primer n'oge, elu nke ọkpọkọ ígwè nke nnukwu dayameta ga-abụ nchara ọzọ, nke na-emetụta nchikota nke ihe nkiri agba.Ebe ọ bụ na agba bụ ihe na-enwe mmetụta oge, ihe ndekọ ndekọ aha na-adịkarị mfe kubie ume wee bụrụ ihe na-adịghị mma.Ya mere, a na-enyochagharị ihe ndị bụ isi nke agba ahụ tupu ejiri ya, na nsonaazụ ya na-agbaso ụkpụrụ.

2.Derusting: Nke a bụ usoro dị mkpa tupu mkpuchi nke nnukwu ọkpọkọ ígwè na ihe ndị dị na ya, ọ bụkwa isi ihe na-eme ka ọkpụkpụ ígwè dị ukwuu.Mwepụ nchara nwere ike ime ka adhesion nke agba mgbochi nchara, si otú ahụ na-agbatị ndụ ọrụ nke nnukwu ọkpọ ígwè ígwè.

3.The elu nke nnukwu-dayameta ígwè ọkpọkọ esichara site sandblasting, ogbugba ogbunigwe ma ọ bụ pickling usoro bụ dịtụ ọcha, na oxide ọnụ ọgụgụ na nchara bụ dịtụ ọcha, nke mma mkpuchi adhesion.Mgbe a na-edozi saịtị nrụnye n'enweghị ihe ọ bụla site na nchara na-agbawa agbawa, enwere ike iji igwe akwụkwọ ntuziaka maka iwepụ nchara, mana erutela ọkwa nchara.