Official Answer
Answer
Passivation (kuri ASTM A967) ikubiyemo kuvura impeta mu bwogero bwa acide nitric cyangwa citricike kugirango ikureho ibyuma byubusa hejuru kandi byongere chromium-oxyde ikingira. Kuri 17-7PH, mubisanzwe bikorwa nyuma yo kuvura ubushyuhe bwa CH900. Kuvura ubushyuhe ubwabyo bitera ibara ryoroheje (igipimo cya oxyde), kigomba kuvaho mbere ya passivasi kugirango habeho isuku. Mu kirere, iki gikorwa kirakomeye kuko na microscopique fer yanduza irashobora gutangiza ruswa ya galvanic yaho, biganisha ku gutobora no kunanirwa kunanirwa mumashanyarazi akomeye ya hydraulic.
