Official Answer
Answer
Passivation (ASTM A967) adeemsa murteessaa booda omishaa ringii sibiilaa hin goggogneef. Yeroo coiling fi handling, particles 'tramp iron' tooling irraa dhufu fuula ring keessatti ukkaamfamuu danda'a. Partikiloonni kun akka iddoo jalqabbii korroojiinii (pitting) ta’anii hojjetu. Passivation jechuun rings bath naitric ykn citric acid keessatti cuuphuu kan sibiilli bilisaa bulbulamuu fi uumamuu layer kiroomiyeemii-oksaayidii haphii fi eegumsaa guddisa. Qaamolee yaalaa ykn aerospace tiif, passivation ring 'stainless' akka ta'u mirkaneessaa fi sababa uumamuu seelii galvanic corrosion localized ta'een yeroo malee akka hin kufne taasisa.
