Official Answer
Answer
Hankali yana faruwa lokacin da bakin karfe ya fallasa ga yanayin zafi tsakanin $800^{\circ}F$ da $1500^{\circ}F$, yana haifar da chromium carbides zuwa hazo a kan iyakokin hatsi. Wannan yana lalata wuraren da ke kusa da chromium, yana lalata layin da ba ya jurewa lalata. A cikin bazarar raƙuman ruwa, wannan yana haifar da lalatawar intergranular, inda bazarar ta zama tsintsiya madaurinki ɗaya kuma ta gaza ƙarƙashin ƙaramin nauyi. Ana ganin wannan sau da yawa a cikin maɓuɓɓugar ruwa waɗanda aka yi wa zafi ba daidai ba ko kuma aka fallasa su ga ƙura. Ana gano gazawar ta hanyar bayyanar 'sukari' na saman karaya a ƙarƙashin girma. Yin amfani da ƙananan ma'aunin carbon ko daidaita maki kamar 321 na iya hana wannan.
