Pehea ka corrosive 904L pā kila kuhiliʻole?

904L pā kila kilaHe ʻano ʻano kila kuhili ʻole austenitic me ka haʻahaʻa haʻahaʻa haʻahaʻa a me ka alloying kiʻekiʻe i hoʻolālā ʻia no nā kaiapuni me nā kūlana corrosive paʻakikī. He ʻoi aku ka maikaʻi o ka corrosion ma mua o316La317L, ʻoiai e noʻonoʻo ana i ke kumukūʻai, ka hana, a me ka maikaʻi. kiʻekiʻe. Ma muli o ka hoʻohui ʻana o 1.5% copper, loaʻa iā ia ka pale corrosion maikaʻi loa i ka hoʻohaʻahaʻa ʻana i nā waikawa e like me ka sulfuric acid a me ka phosphoric acid. Loaʻa iā ia ke kūpaʻa ʻino maikaʻi loa e kūʻē i ke koʻikoʻi corrosion pitting a me ka crevice corrosion i hoʻokumu ʻia e nā ions chloride, a he kūpaʻa maikaʻi i ka corrosion intergranular. I loko o ka sulfuric acid maʻemaʻe i ka pae hoʻopaʻa ʻana o 0-98%, hiki ke kiʻekiʻe ka mahana lawelawe o 904L pā kila kila e like me 40 degere Celsius. I loko o ka phosphoric acid maʻemaʻe i loko o ka pae hoʻopaʻa ʻana o 0-85%, maikaʻi loa kona kūpaʻa corrosion. I loko o ka ʻenehana phosphoric acid i hana ʻia e nā kaʻina wai, he hopena koʻikoʻi nā haumia i ka pale ʻana i ka corrosion. Ma waena o nā ʻano phosphoric acid, 904L super austenitic stainless steel i ʻoi aku ka maikaʻi o ka corrosion ma mua o ke kila kila maʻamau. I loko o nā ʻakika oxidizing ikaika, ʻo 904L ke kila kila he haʻahaʻa haʻahaʻa haʻahaʻa ka pale ʻana i ka corrosion ma mua o nā ʻano kila i hoʻohui ʻia. i loko o kēia pae koʻikoʻi. ʻOi aku ka maikaʻi o ka pale ʻana o ke kila 904L ma mua o ke kila kila maʻamau. 904L kila kuhiliʻole kiʻekiʻe kū'ē i ka pitting corrosion. ʻO kona kūpaʻa ʻana i ka crevice corrosion i loko o nā hāʻina chloride. Maikaʻi nō hoʻi ka ikaika. ʻO ka maʻiʻo nickel kiʻekiʻe o904L pā kilae hoemi ana i ka poino ma na lua a me na humuhumu. Ma muli o kona kiʻekiʻe nickel maʻiʻo, 904L he kiʻekiʻe ke kū'ē i ke koʻikoʻi o ka corrosion cracking in nitride solutions, concentrated hydroxide solutions and hydrogen sulfide-rich environments.