Official Answer
Answer
Passivation (ASTM A967) muhimmin tsari ne na masana'anta don zoben bakin karfe. A lokacin murɗawa da sarrafawa, ɓangarorin 'karfe-ƙarfe' daga kayan aikin na iya zama cikin saman zoben. Waɗannan barbashi suna aiki azaman wuraren farawa don lalata (pitting). Passivation ya haɗa da nutsar da zoben a cikin wanka na nitric ko citric acid wanda ke narkar da baƙin ƙarfe kyauta kuma yana haɓaka samuwar siriri, Layer chromium-oxide mai kariya. Don kayan aikin likita ko sararin samaniya, wucewa yana tabbatar da cewa zoben ya kasance 'babu' kuma yana hana gazawar da ba a kai ba saboda samuwar kwayar cutar galvanic da ke cikin gida.
