Official Answer
Answer
Passivation (da ASTM A967) ya ƙunshi yin maganin zobe a cikin wanka na nitric ko citric acid don cire baƙin ƙarfe kyauta daga saman da haɓaka Layer na chromium-oxide mai kariya. Don 17-7PH, ana yin wannan yawanci bayan maganin zafi na CH900. Maganin zafi da kanta yana haifar da launi mai haske (ma'auni oxide), wanda dole ne a cire shi kafin wucewa don tabbatar da tsabtataccen wuri. A cikin sararin samaniya, wannan tsari yana da mahimmanci saboda ko da ƙananan gurɓataccen ƙarfe na iya fara lalata galvanic na gida, wanda zai haifar da raguwa da gazawar gajiya a cikin ma'auni mai mahimmancin injin motsa jiki.
