1. ʻO ka ʻino o ka lewa: ʻo ka ʻino o ka lewa o nā mea metala e hilinaʻi nui ʻia i ka mahu wai i ka lewa a me ke kiʻi wai ma ka ʻili o ka mea. Ua kapa ʻia ka haʻahaʻa pili o ka lewa ʻo ka haʻahaʻa koʻikoʻi ke hoʻomaka ka piʻi ʻana o ka ʻino o ka lewa metala. ʻO ka haʻahaʻa koʻikoʻi okeleaweʻO ka huila a me nā metala ʻē aʻe he 50% a me 70%. He hopena hoʻonui koʻikoʻi ka hoʻohaumia ʻana o ka lewa i ka corrosion o ke keleawe keleawe. ʻO ka palaho o nā mea kanu a me nā kinoea hoʻopau hale hana, ka amonia a me ke kinoea hydrogen sulfide i ka lewa, ʻoi aku ka nui o ka ammonia i ka hoʻoheheʻe ʻana o ke keleawe a me ke keleawe, ʻoi aku ka ʻino o ke kaumaha. ʻO C02, SO2, NO2 a me nā mea haumia acidic ʻē aʻe i ka lewa ʻoihana kūlanakauhale e hoʻoheheʻe ʻia i loko o ka wai kiʻiʻoniʻoni a hydrolyze, e hana ai i ka wai kiʻi acidified a me ke kiʻi pale paʻa ʻole.
2. ʻO ka ʻinoʻino o ka ʻāina paʻi: ʻo ke ʻano ʻino o ka hui keleawe ma ka ʻāpana paʻi o ka wai kai kokoke loa i kēlā i ka lewa moana. ʻO kēlā me kēia hui keleawe me ke kūpaʻa ʻino maikaʻi i nā lewa moana koʻikoʻi e loaʻa nō hoʻi ke kūpaʻa corrosion maikaʻi ma ka ʻāpana splash. Hāʻawi ka spatter zone i ka oxygen lawa e hoʻolalelale i ka ʻino o ke kila, akā e maʻalahi ka paʻa ʻana o ke keleawe a me ke keleawe. ʻAʻole i ʻoi aku ka nui o ka corrosion o nā ʻāpana keleawe i ʻike ʻia i ka splash zone ma mua o 5μm/a.
3. Stress corrosion: ke kau māwae o ke keleawe he typical 'elele o stress corrosion o ke keleawe. ʻO nā māwae kau, i ʻike ʻia i ka hoʻomaka ʻana o ke kenekulia 20, he mau māwae ma ka ʻaoʻao o luna o kahi pahu pūpū e kulu ʻia ana i ke poʻo kaua. Loaʻa pinepine ʻia kēia ʻano ʻano ma nā wahi ʻuala, ʻoi aku hoʻi i ka wā ua, no laila ka inoa ʻo seasonal cleft. No ka mea pili i ka ammonia a i ʻole nā mea hoʻoheheʻe ammonia, ua kapa ʻia ʻo ia ka māwae ammonia. ʻO ka ʻoiaʻiʻo, ʻo ka hele ʻana o ka oxygen a me nā mea ʻokiʻoki ʻē aʻe, a me ka hele ʻana o ka wai he mau kūlana koʻikoʻi no ka corrosion stress o ke keleawe.
4. Decomposition corrosion: keleawe dezinc mea kekahi o ka loa typical copper alloy decomposition corrosion, hiki ke hele pū me ka stress corrosion kaʻina i ka ia manawa, hiki ke hana wale. ʻElua ʻano o ka dezincification: ʻo ka lamellar shedding type dezincification, e hōʻike ana i ke ʻano corrosion ʻaʻahu, liʻiliʻi ka pōʻino i ka hoʻohana ʻana i nā mea. ʻO ka mea ʻē aʻe ʻo ke ʻano hoʻomohala hohonu e like me ka dezincization, ma ke ʻano o ka corrosion lua, i emi nui ai ka ikaika waiwai, nui ka pōʻino.
5. ʻO ka pōʻino o ka moana: ʻo ke keleawe keleawe i loko o ke kaiapuni moana ma waho aʻe o ka lewa moana, aia nā wahi e paʻi ʻia ai ka wai kai, ke kai a me ka wahi immersion piha.
Ka manawa hoʻouna: Iune-27-2022