Answer
Passivation magani ne na sinadarai (yawanci a cikin nitric ko citric acid) wanda ke cire 'ƙarfe kyauta' daga saman zoben bakin karfe kuma yana haɓaka Layer na chromium-oxide mai kariya. Don aikace-aikacen likita, wannan yana da mahimmanci don hana tabo 'tsatsa' da tabbatar da daidaituwar halittu. Tsarin yana bin ka'idodin ASTM A967. A cikin zobe na karkace, wanda ke da yadudduka da yawa a kusanci, dole ne a yi wucewa a hankali don tabbatar da acid ya kai saman saman tsakanin jujjuyawar. Idan ƙarfe kyauta ya kasance a tarko tsakanin juyi, zai iya haifar da lalata galvanic. Bayan wucewar zoben, ana wanke zoben a cikin ruwan da aka cire don tabbatar da cewa babu sauran ragowar sinadarai, wanda zai iya haifar da munanan halayen a wurin asibiti.
