Official Answer
Answer
Passivation (da ASTM A967) magani ne na sinadarai ta amfani da nitric ko citric acid don cire 'ƙarfe kyauta' daga saman magudanar ruwa. Don 302 ko 316 bakin karfe, wannan tsari yana haɓaka Layer na chromium-oxide mai karewa. Duk da yake passivation ba ta zahiri canza girma inji Properties, shi ya hana samuwar ramin lalata wuraren. A cikin aikace-aikacen keke-da-keke, ramuka suna aiki azaman masu tattara damuwa ($ K_t$) waɗanda ke haɓaka ƙaddamarwar gajiya sosai. Ta hanyar kawar da waɗannan rukunin yanar gizon, wucewa yana tabbatar da cewa rayuwar gajiyar da aka ƙididdige ta amfani da $S_{alt} = \frac{S_{max} - S_{min}}{2}$ ya kasance mai inganci a cikin mahalli masu lalata, yana hana gazawar da wuri saboda hulɗar lalata-gajiya.
