ʻAi keleawe

He kūpaʻa maikaʻi loa nā ʻāpana keleawe i ka ʻino o ka lewa a me ka wai kai, e like me ke keleawe silika,alumini keleawea laila.I loko o ka pāpaho maʻamau, ua hoʻomalu ʻia e ka corrosion like.He ikaika koʻikoʻi corrosion susceptibility i loko o ka hoʻonā i ke alo o ka amonia, a ma laila nō hoʻi kūloko corrosion palapala e like me galvanic corrosion, pitting corrosion, a abrasion corrosion.ʻO ka dezincification o ke keleawe, ka hoʻokaʻawale ʻana o ke keleawe aluminika, a me ka denitrification o ka cupronickel nā ʻano ʻokoʻa o ka corrosion i nā alloys keleawe.
I ka wā o ka launa pū ʻana o nā ʻāpana keleawe me nā kaiapuni lewa a me ka moana, hiki ke hana ʻia nā kiʻi pale pale passive a semi-passive paha ma ka ʻili o nā ʻāpana keleawe, kahi e pale ai i nā ʻano corrossion.No laila, ʻo ka hapa nui o nā ʻāpana keleawe e hōʻike i ke kūpaʻa corrosion maikaʻi loa i nā kaiapuni lewa.
ʻO ka pōʻino o ka lewa o nā hui keleawe ʻO ka ʻino 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.ʻO ka haʻahaʻa haʻahaʻa o ka lewa i ka wā e hoʻomaka ai ka piʻi ʻana o ka pōʻino o ka ea metala e piʻi nui i kapa ʻia ʻo ka haʻahaʻa koʻikoʻi.ʻO ka haʻahaʻa koʻikoʻi o nā ʻāpana keleawe a me nā metala ʻē aʻe ma waena o 50% a me 70%.He hopena koʻikoʻi ka pollution i ka lewa i ka ʻino o nā ʻāpana keleawe.Hoʻoheheʻe ʻia nā mea haumia acidic e like me C02, SO2, NO2 i ka lewa ʻoihana kūlanakauhale i loko o ke kiʻi wai a hydrolyzed, kahi e hoʻokahe ai ka kiʻi wai a paʻa ʻole ke kiʻi pale.ʻO ka palaho o nā mea kanu a me ke kinoea hoʻopau i hoʻokuʻu ʻia e nā hale hana e noho ai ka amonia a me ke kinoea hydrogen sulfide i ka lewa.Hoʻoikaika nui ʻo Ammonia i ka ʻino ʻana o ke keleawe a me ke keleawe, ʻoi aku ka nui o ka corrosion stress.
ʻOkoʻa loa ka hiki ʻana o ka corrosion o ke keleawe a me ke keleawe i loko o nā kaiapuni corrosion o ka lewa.Ua hōʻike ʻia ka ʻikepili corrosion i loko o ka moana nui, ʻoihana a me nā kaiapuni o ka lewa no 16 a 20 mau makahiki.ʻO ka hapa nui o nā ʻāpana keleawe i hoʻokaʻawale ʻia, a ʻo ka nui o ka corrosion he 0.1 a 2.5 μm/a.ʻO ka nui o ka corrosion o ka copper alloy i loko o ka lewa ʻoihana paʻakikī a me ka lewa moana ʻoihana he ʻoi aku ka kiʻekiʻe ma mua o ka lewa moana māmā a me ka lewa kuaʻāina.Hiki ke hoʻonui nui ʻia ka lewa haumia i ke koʻikoʻi o ka corrosion susceptibility o ke keleawe.Ke hoʻomaka nei ka hana e wānana a hoʻokaʻawale i ka nui o ka corrosion o nā hui keleawe e nā lewa like ʻole e pili ana i nā kumu kaiapuni.