Pehea ka ʻino o ka papa kila kila 904L?

Papa kila kila 904Lhe ʻano kila kila austenitic me ka haʻahaʻa loa o ke kalapona a me ke kiʻekiʻe o ka hoʻohuihui i hoʻolālā ʻia no nā wahi me nā kūlana ʻino. ʻOi aku ka maikaʻi o ke kūpaʻa ʻana i ka ʻino ma mua o316La me317L, me ka noʻonoʻo ʻana i ke kumukūʻai, ka hana, a me ke kumukūʻai kūpono. kiʻekiʻe. Ma muli o ka hoʻohui ʻana o 1.5% keleawe, loaʻa iā ia ke kūpaʻa maikaʻi loa i ka hōʻemi ʻana i nā waikawa e like me ka sulfuric acid a me ka phosphoric acid. Loaʻa iā ia ke kūpaʻa maikaʻi loa i ka corrosion stress pitting a me ka crevice corrosion i hoʻokumu ʻia e nā ions chloride, a he kūpaʻa maikaʻi i ka intergranular corrosion. I loko o ka sulfuric acid maʻemaʻe i ka pae concentration o 0-98%, hiki i ka mahana lawelawe o ka papa kila 904L ke kiʻekiʻe i 40 degere Celsius. I loko o ka phosphoric acid maʻemaʻe i ka pae concentration o 0-85%, maikaʻi loa kona kūpaʻa corrosion. I loko o ka phosphoric acid ʻoihana i hana ʻia e nā kaʻina hana pulu, he hopena ikaika ka haumia i ke kūpaʻa corrosion. Ma waena o nā ʻano phosphoric acid āpau, ʻoi aku ka maikaʻi o ke kūpaʻa corrosion o ke kila kila super austenitic 904L ma mua o ke kila kila maʻamau. I loko o nā waikawa oxidizing ikaika, ʻoi aku ka haʻahaʻa o ke kūpaʻa corrosion o ke kila kila 904L ma mua o nā ʻano kila alloyed like ʻole. i loko o kēia pae concentration. ʻOi aku ka maikaʻi o ke kūpaʻa corrosion o ke kila 904L ma mua o ke kila kila maʻamau. He kiʻekiʻe ke kūpaʻa o ke kila kila 904L i ka palaho lua. ʻO kona kūpaʻa i ka palaho crevice i loko o nā hopena chloride. Maikaʻi loa hoʻi ka ikaika. ʻO ke kiʻekiʻe o ka nickel oPapa kila 904Lhoʻemi i ka nui o ka pala i loko o nā lua a me nā ʻūmiʻi. Ma muli o kona nui o ka nickel, loaʻa iā 904L ke kūpaʻa kiʻekiʻe i ka haki ʻana o ka pala i loko o nā hopena nitride, nā hopena hydroxide i hoʻopaʻa ʻia a me nā wahi waiwai i ka hydrogen sulfide.