Lokacin da aka yi zafi da ƙirƙira, lokacin zama yana da tsayi sosai a yanayin zafi mai yawa, iskar oxygen a cikin tanderun da iskar oxygen a cikin tururin ruwa suna haɗuwa tare da atom na ƙarfe na ƙirƙira kuma ana kiran sabon abu na oxidation.Fusible da aka samu ta hanyar mannewar baƙin ƙarfe oxide a saman fatar ƙarfe mai ƙarfi oxide, kamar ƙirƙira kafin a cire ƙazanta, za a matse shi a cikin farfajiyar ƙirƙira, tsaftacewa ko bayan tsintsiyar, saƙar peeling sag da aka samu.ƙirƙira surfacepitting, mai tsanani lokacin ƙirƙira girman geometry, izinin injin, ko sakamakon rashin isasshe da sanya sassan da baƙar fata a kan tarkace, zai yi tasiri akan daidaitonmutu forgings.

Hanyoyin hana oxidation sune:
(1) rage lokacin zama a babban zafin jiki lokacin da ƙirƙira ya yi zafi, aiwatar da dumama cikin sauri, da ƙoƙarin amfani da hanyar aiki na ƙarancin lodi da yawan lodawa.
(2) kiyaye micro oxidation yanayi a cikin tanderun, rage ruwa tururi abun ciki a cikin tanderun, gudanar da kasa da hadawan abu da iskar shaka dumama ko don kare shafi jiyya,
(3) ajiye ɗan ƙaramin matsi mai kyau a cikin tanderun don hana iska mai sanyi shiga cikin tanderun.
(4) bayan an yi zafi mai ƙirƙira, buroshi, ruwa mai ƙarfi (matsa lamba aƙalla 10Mpa) ko kuma a shafa nakasar (idan dai akwai 0.05% na ƙarfe na tsarin? 0.2% na matakin nakasar) don cire sikelin oxide.