Kāhea ʻia ka ʻawaʻawa lua liʻiliʻi, ka lua a i ʻole ka lua.
He ʻano ia o ka pōʻino ʻino i ka hapa nui o ka ʻili o kahana metalaʻaʻole ʻino a ʻānai liʻiliʻi, akā ʻike ʻia nā puka ʻino ma nā wahi kūloko a ulu hohonu.Aia kekahi mau lua ma kahi kaʻawale, a ʻo nā lua ʻē aʻe i hoʻopaʻa paʻa ʻia a like me ka ʻili ʻili.Nui a liʻiliʻi paha nā lua etch, akā ʻoi aku ka liʻiliʻi, e like me ka mea i hōʻike ʻia ma ke kiʻi ma lalo nei, ma ke ʻano o ka nui, ua like ka hohonu o ka lua etch a ʻoi aku paha ma mua o ke anawaena o ka lua etch.ʻO ka pitting kekahi o nā ʻano ʻino ʻino loa o ke kila kila kila duplex.ʻO nā lua lua ke kahua hoʻomaka o nā māwae koʻikoʻi a me nā māwae luhi.
Kila kohu ʻoleili passivation kiʻiʻoniʻoni ma muli o ke alo o na defects i kuhiliʻole kila, inclusions a me solutes, e like me inhomogeneity, no laila, i ka passivation kiʻiʻoniʻoni i oi fragile ma keia mau wahi, i loko o kekahi corrosive hopena ua maʻalahi luku, ka luku o ka hapa o ka anode lilo. Ho'ā, lilo ka wahi a puni i wahi cathode, liʻiliʻi loa ka ratio o nā mea ʻelua, ʻoi aku ka nui o ka anodic current density, wikiwiki ka hana o ka solvation, a laila lilo i mau lua e like me ka nila.
Ke kila kila, a me nā metala ʻē aʻe e hilinaʻi neihoʻopaʻapaʻano ka pale ʻana i ka ʻinoʻino, i loko o kahi hopena i loaʻa kahi anion kikoʻī (chloride, bromide, hypochlorite, a i ʻole thiosulfate ion).ʻOiai ka lōʻihi o ka pōʻino (a i ʻole ka mea hiki ke hoʻohana ʻia i ka wā o ka polarization anodic) ma mua o ka hiki ʻana o ka lua Eb, hiki ke hana i ka lua.ʻO ke ʻano o ka hoʻopaʻa ʻana i ka corrosion o ka duplex stainless steel ua like ia me nā kila kila ʻē aʻe.
Hana ʻia metalame ka media oxidizing, kona helu ʻino ʻana ma mua o ka mea i mālama ʻole ʻia ma mua o ka emi nui ʻana o ka hanana i kapa ʻia ʻo ka passivation metala.Hiki ke hoʻohana nui ʻia ka mīkini passivation e wehewehe i ke kumumanaʻo kiʻiʻoniʻoni lahilahi, ʻo ia hoʻi,hoʻopaʻapaʻama muli o ke kuleana o ka metala a me ka oxidizing media, ke kuleana o ka ʻili metala e hoʻohua i kahi hana ʻoi aku ka lahilahi, paʻa, maikaʻi ka uhi ʻana, hiki ke hoʻopili paʻa ʻia i ke kiʻiʻoniʻoni passivation metala.Loaʻa kēia kiʻiʻoniʻoni i kahi ʻāpana ʻokoʻa, maʻamau ka oxygen a me nā pūhui metala.Hoʻokani ia i ka hana o ka metala a me ka corrosion media i hoʻokaʻawale loa ʻia mai ke kuleana o ka pale ʻana i ka metala a me ka corrosion media i ka hoʻopili pololei ʻana, no laila e hoʻōki ka metala i ka hoʻoheheʻe ʻana e hana i kahi kūlana passivated e pale i ka hopena o ka corrosion.
Ka manawa hoʻouna: Dec-27-2023