Answer
A cikin masana'antar harhada magunguna, dole ne maɓuɓɓugan ruwan raƙuman ruwa su kasance ba su da duk wani gurɓataccen ƙwayar cuta kuma su kasance da ƙaƙƙarfan Layer oxide mai ƙarfi don hana leaching na ion ƙarfe. Rage tururi ta amfani da chlorinated ko fluorinated kaushi yana cire ragowar mai daga tsarin murɗawa. Wannan yana biye da wucewa bisa ga ASTM A967, yawanci ta yin amfani da wanka na nitric ko citric acid. Passivation yana narkar da baƙin ƙarfe kyauta daga saman kuma yana haɓaka rabon chromium-to-iron a cikin fim ɗin farfajiyar, yana inganta haɓaka juriya. Don 316 bakin karfe, citric acid sau da yawa ana fifita shi don dalilai na muhalli da kuma ikonsa na iya lalata ƙarfe da kyau ba tare da kai hari ga guntun tushe ba, yana tabbatar da bazara ya cika buƙatun FDA don tsabta.
