He aha nā mea maikaʻi o nā huahana alloy-kūpono
ʻAʻole hiki ke hoʻohana ʻia nā ʻāpana corrosion-resistant i loko o nā wahi corrosive me ka hoʻohaʻahaʻa ikaika a i ʻole ka hana sealing kiʻekiʻe (anoxic environment), a ke hoʻomau mau nei ka hana o nā huahana, a hoʻohana nui ʻia lākou, a he nui nā mea hana o nā huahana, pehea e hana ai. koho ʻO ka mea hana i kūpono iā ʻoe he ʻepekema.Ma kekahi ʻaoʻao, pono e noʻonoʻo ʻia ka ʻike e pili ana i ke kumukūʻai, a pono e noʻonoʻo ʻia nā ʻano ʻē aʻe, e like me ka hoʻoponopono ʻana o ka mea hana a inā paha e hōʻoia ʻia ka lawelawe ma hope o ke kūʻai aku.
ʻAi ʻAi Paʻa Paʻa
He aha nā ʻano o nā mea hoʻoheheʻe kū i ka corrosion?
1. ʻAiʻino o ke kila kuhiliʻole
ʻO ka mea nui e pili ana i ka 300 series stainless steel 304, 316L, 317L, a me nā mea ʻē aʻe i kū i ka ʻino o ka lewa a i ʻole ka wai kai;austenitic stainless steel 904L, 254SMO me ka ikaika o ka corrosion resistance;kila duplex 2205, 2507, etc.;nā mea hoʻoheheʻe kūʻē i ka corrosion i loaʻa ka CU 20 alloy, etc.
2. Base corrosion-kū pale i ka huila
ʻO ka hapa nui o Hastelloy alloy a me NI-CU alloy, a me nā mea ʻē aʻe. No ka mea ʻo ka metala NI ponoʻī he ʻano cubic alo, ʻo kona kūpaʻa crystallographic e hiki ai iā ia ke hoʻokomo i nā mea alloying hou aʻe ma mua o FE, e like me CR, MO, etc., i mea e hoʻokō ai. kū'ē Ka hiki o nā kaiapuni like ʻole;i ka manawa like, hiki i ka nickel ke pale aku i ka corrosion, ʻoi aku ka hiki ke pale aku i ka corrosion stress i hana ʻia e nā ion chloride.I loko o nā pōʻino hoʻohaʻahaʻa ikaika, nā kaiapuni ʻakika huikau paʻakikī, a me nā ʻoluʻolu i loaʻa nā ion halogen, nā mea hoʻoheheʻe kūpaʻa i ka nickel i hōʻike ʻia e Hastelloy he mau mea maikaʻi loa ma mua o nā kila kila kila.
3.Hatelloy no ka nickel-molybdenum-chromium-iron-tungsten nickel-based alloy.ʻO ia kekahi o nā mea metala o kēia wā me ka pale ʻana i ka corrosion.ʻO ka mea nui ke kū'ē i ka chlorine pulu, nā chlorides oxidizing like ʻole, nā paʻakai paʻakai chloride, ka waikawa sulfuric a me nā paʻakai oxidizing, a maikaʻi ke kūpaʻa corrosion i ka haʻahaʻa haʻahaʻa a me ka mahana wela hydrochloric acid.No laila, i loko o nā makahiki he ʻekolu i hala iho nei, ua hoʻohana nui ʻia ia i nā kaiapuni corrosive koʻikoʻi, e like me ka ʻoihana kemika, ʻoihana petrochemical, flue gas desulfurization, pulp a me ka pepa, ka mālama ʻana i ke kaiapuni a me nā ʻoihana ʻoihana ʻē aʻe.He ʻano maʻamau ka ʻikepili corrosion o Hastelloy alloys, akā ʻaʻole hiki ke hoʻohana ʻia e like me nā kikoʻī, ʻoi aku hoʻi i nā wahi ʻike ʻole, a pono e koho ʻia nā mea ma hope o ka hoʻāʻo ʻana.ʻAʻole lawa ka Cr ma Hastelloy e pale aku i ka ʻinoʻino i loko o nā kaiapuni oxidizing ikaika, e like me ka waika nitric concentrated wela.ʻO ka hana ʻana o kēia alloy ka mea nui no ke kaʻina kaʻina hana kemika, ʻoi aku ka nui o ke alo o ka waikawa i hui ʻia, e like me ka paipu hoʻokuʻu o ka ʻōnaehana desulfurization flue gas.
Ka manawa hoʻouna: Mei-15-2023
