1. ikuku corrosion: ikuku corrosion nke metal ihe tumadi dabere na mmiri vepo na ikuku na mmiri film n'elu nke ihe. A na-akpọ iru mmiri dị n'ime ikuku dị oke egwu mgbe ọnụ ọgụgụ corrosion nke ikuku igwe malitere ịbawanye nke ọma. Oke iru mmiri nkeọla kọpaalloy na ọtụtụ ọla ndị ọzọ dị n'etiti 50% na 70%. Mmetọ ikuku na-enwe mmetụta nkwalite dị ukwuu na nrụrụ nke alloy ọla kọpa. Osisi ire ere na gas iyuzucha gas, amonia na hydrogen sulfide gas na ikuku, amonia na-eme ka corrosion nke ọla kọpa na ọla kọpa dị ngwa ngwa, ọkachasị corrosion nrụgide. C02, SO2, NO2 na ihe ndị ọzọ na-emetọ acidic na ikuku ụlọ ọrụ mepere emepe na-agbaze na fim mmiri na hydrolyze, na-eme ka ihe nkiri mmiri ahụ dị acidified na ihe nkiri nchebe na-ejighị n'aka.
2. Splash zone corrosion: omume corrosion nke ọla kọpa alloy na splash mpaghara nke mmiri oké osimiri dị nnọọ nso na nke oké osimiri ikuku. Alloy ọla kọpa ọ bụla nwere ezigbo nguzogide corrosion na ikuku mmiri siri ike ga-enwekwa ezigbo nguzogide corrosion na mpaghara splash. Mpaghara spatter na-enye oxygen zuru oke iji mee ka nrụrụ nchara dị ngwa ngwa, mana ọ na-eme ka ọla kọpa na ọla kọpa na-eme ka ọ dị mfe ka ọ na-apụ n'anya. Ọnụego corrosion nke alloys ọla kọpa ekpughere na mpaghara splash anaghị agafe 5μm/a.
3. Nchegbu corrosion: oge mgbape nke ọla bụ ihe nnọchianya nke nrụgide corrosion nke ọla kọpa alloy. Mgbawa ndị a na-enwe n'oge, bụ́ ndị a chọpụtara na mmalite narị afọ nke 20, bụ mgbawa n'akụkụ elu nke mkpuchi shei nke na-adaru n'isi agha. Ihe a na-emekarị n'ebe okpomọkụ, karịsịa n'oge oge mmiri ozuzo, n'ihi ya, a na-akpọ aha oge mgbawa. N'ihi na ọ metụtara amonia ma ọ bụ ihe amonia, a na-akpọkwa ya amonia crack. N'ezie, ọnụnọ oxygen na ndị ọzọ oxidants, na ọnụnọ nke mmiri bụkwa ọnọdụ dị mkpa maka nrụgide corrosion nke brass.
4. Decomposition corrosion: brass dezinc bụ otu n'ime ihe ndị kasị ahụkarị ọla kọpa alloy decomposition corrosion, nwere ike na-esonyere nrụgide corrosion usoro n'otu oge ahụ, nwekwara ike ime naanị. E nwere ụdị abụọ nke dezincification: otu bụ lamellar shedding ụdị dezincification, na-egosi edo corrosion ụdị, dịtụ obere nsogbu na ojiji nke ihe. Nke ọzọ bụ ihe omimi bolt-dị ka mmepe ụdị dezincization, n'ụdị olulu corrosion, nke mere na ihe ike ebelata budata, nnukwu nsogbu.
5. Mmiri gburugburu ebe obibi corrosion: ọla kọpa alloy corrosion na gburugburu mmiri na mgbakwunye na ikuku mmiri, e nwere oké osimiri splashing ebe, tidal nso na zuru immersion ebe.
Oge nzipu: Jun-27-2022