Answer
SAE 1070 carbon karfe shine mafi kyawun zaɓi don riƙe zoben amma ba shi da juriya na lalata. A cikin aikace-aikacen motoci masu ɗorewa (misali, ƙaƙƙarfan hood ko abubuwan dakatarwa), zai yi oxidize da sauri, yana samar da baƙin ƙarfe oxide ($ Fe_2O_3 $), wanda ke haifar da raguwa a cikin ingantaccen ɓangaren giciye da gazawar da bai kai ba. Hanyoyin kariya na gama gari sun haɗa da rufin zinc phosphate ('Oil da Phosphate') ko murfin flake na zinc (misali, Magni ko Geomet). Koyaya, waɗannan suturar na iya ƙara kauri, mai yuwuwar tsoma baki tare da dacewa da tsagi. Idan aikace-aikacen ya ƙunshi feshin gishiri, canzawa zuwa 302 bakin karfe ko 17-7PH yawanci ya zama dole don tabbatar da rayuwar sabis na shekaru 10-15 da OEMs na zamani ke buƙata.
