1. Nmikpu
Ihe ndị mejupụtara ntụ ntụ na-esi ísì ụtọ.Impregnation, nke a makwaara dị ka ntinye, gụnyere imeju ọtụtụ pores na ihe ndị a: plastik, resins, ọla kọpa, mmanụ, ihe ọzọ.Ịtụnye ihe ndị ahụ porous n'okpuru nrụgide nwere ike ime ka mmiri na-agbapụta, ma ọ bụrụ na ị mikpuo akụkụ ahụ, ọ ga-aghọ ihe na-adịghị ike.Ihe ndị a na-eji eme ihe na-adabere na ihe ndị dị ka ọnụ ahịa na ngwa.Dịka ọmụmaatụ, ọla kọpa nwere ike ịza mgbe a na-eme ihe, si otú a na-emebi nkwụsi ike n'ogo.Imikpu n'ime mmanụ nwere ike mmanye akụkụ ahụ ozugbo.Ihe niile dabere na ihe ị chọrọ imewe.
2. Electrolating
Electroplating bụ ihe ọzọ na igwe anaghị agba nchara maka aesthetic ma ọ bụ arụ ọrụ mkpa - na-eme ka akụkụ anya mara mma, na-eme ka corrosion eguzogide, wdg Plating na-enye gị àgwà ndị a mgbe ikwe ka ị "Sanwichi" dị ọnụ ala ihe n'ime mbụ akụkụ.
3. Mgbọ peening
Ịgba egbe bụ usoro njupụta mpaghara, nke nwere ike imeziwanye akụkụ nke akụkụ ahụ site na iwepụ burrs na itinye nrụgide nrụgide elu na akụkụ ahụ.Nke a nwere ike ịba uru na ngwa ike ọgwụgwụ ụfọdụ.Mgbawa aja na-emepụtakwa obere olulu mmiri na-ejide mmanụ n'elu akụkụ ahụ.A na-ebutekarị mgbawa ike ọgwụgwụ site na ntụpọ elu.Mgbọ peening nwere ike igbochi nguzobe nke mgbawa elu ma nwee ike igbu oge mmepe nke mgbawa n'ozuzu ya.
4. ọgwụgwọ Steam
Mgbe etinyere ya na ihe ndị nwere ígwè, ọgwụgwọ uzuoku ga-etolite oyi akwa oxide dị gịrịgịrị ma sie ike.Okpokoro oxide anaghị agba nchara;Ọ bụ ihe na-arapara ígwè.Igwe oyi akwa a nwere ike melite nguzogide corrosion, nguzogide nrụgide na isi ike