Hiki ke hoʻokaʻawale ʻia nā ʻano corrosion o nā metala i ʻelua ʻāpana: ʻo ka corrosion piha a me ka corrosion kūloko.A hiki ke hoʻokaʻawale ʻia ka corrosion localized i: pitting corrosion, crevice corrosion, galvanic coupling corrosion, intergranular corrosion, selective corrosion, stress corrosion, corrosion fatigue a me ka corrosion.
Hōʻike ʻia ka corrosion e ka corrosion i hoʻokaʻawale like ʻia ma ka ʻili o ka metala, i ʻoi aku ka lahilahi o ka metala.Loaʻa ka ʻinoʻino ma lalo o ke ʻano e hiki ai i ke ʻano corrosive ke hiki i nā ʻāpana a pau o ka ʻili metala me ke ʻano like ʻole, a ʻano like ke ʻano a me ka hoʻonohonoho ʻana o ka metala.
ʻO ka pōʻino lua, ʻike ʻia hoʻi ʻo ka corrosion puka liʻiliʻi, ʻo ia ke ʻano o ka corrosion i hoʻopaʻa ʻia i loko o kahi liʻiliʻi liʻiliʻi o ka ʻili metala a hohonu i loko o ka metala i loko o ka pore-like corrosion.
Kūlike nā kūlana corrosion pitting i nā ʻano mea, waena a me nā kūlana electrochemical:
1, puka maʻamau ka pitting i ka passivation maʻalahi o ka ʻili metala (e like me ke kila kila, aluminika) a i ʻole ka ʻili o ka metala me ka cathodic plating.
2, puka ka lua ma ke alo o nā ion kūikawā, e like me nā ion halogen i ka waena.
3, loaʻa ka pōʻino lua ma kahi koʻikoʻi koʻikoʻi ma luna, i kapa ʻia ʻo ka pitting potential a i ʻole rupture potential.
ʻO ka corrosion intergranular kahi mea metala i loko o kahi ʻano corrosive kikoʻī ma ka palena o ka palaoa a i ʻole nā palena palaoa kokoke i ka ʻino, i hiki ai i ka nalowale o ka paʻa ʻana ma waena o nā ʻōpala o kahi mea ʻino.
ʻO ka corrosion koho e pili ana i nā mea ʻoi aku ka ikaika i loko o nā huila he nui i hoʻoheheʻe ʻia, ʻo kēia kaʻina hana ma muli o nā ʻokoʻa electrochemical i nā ʻāpana alloy.
ʻO Crevice corrosion ka loaʻa ʻana o ka electrolyte ma waena o ka metala a me ka metala a me ka metala a ʻaʻole metala he ʻāpana liʻiliʻi, ua ālai ʻia ka neʻe ʻana o ka mea waena i ka wā o kahi kūlana corrosion localized.
ʻO ka hoʻokumu ʻana o ka corrosion crevice:
1, ka pilina ma waena o nā ʻāpana hana like ʻole.
2, ma ka ʻili metala o nā waihona, nā mea hoʻopili, ka uhi a me nā huahana corrosion ʻē aʻe.
Ka manawa hoʻouna: Mar-15-2024