ʻAi ʻAi Paʻa PaʻaMonel 400Paipu huila nikela poepoe

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ʻO Monel 400 (UNS N04400 / 2.4360) he nickel-copper alloy me ka ikaika kiʻekiʻe a me ke kū'ē maikaʻi loa i ka laulā o ka media me ka wai kai, dilute hydrofluoric a me ka sulfuric acids, a me nā alkalies.
ʻO Monel 400 e loaʻa ana ma kahi o 30-33% keleawe i loko o ka nickel matrix he nui nā ʻano like o ka nickel maʻemaʻe kālepa, ʻoiai e hoʻomaikaʻi ana ma luna o nā mea ʻē aʻe. ʻO ka hoʻohui ʻana i kekahi hao e hoʻomaikaʻi nui i ke kūʻē ʻana i ka cavitation a me ka erosion i nā noi condenser tube. ʻO ka hoʻohana nui ʻana o Monel 400 aia ma lalo o nā kūlana o ke kahe kahe kiʻekiʻe a me ka erosion e like me nā propeller shafts, propellers, pump-impeller blades, casings, condenser tubes, a me nā paipu hoʻololi wela. ʻOi aku ka liʻiliʻi ma mua o 0.025 mm / makahiki ka nui o ka corrosion ma ka neʻe ʻana o ka wai kai. Hiki i ke kinikini ke komo i loko o ka wai kai pa'a, akā na'e, 'oi aku ka li'ili'i o ka ho'ouka kaua ma mua o ka huila ma'ema'e kālepa 200. Ma muli o kona ki'eki'e nickel ma'i'o (ma kahi o 65%), 'a'ole ma'amau ka huila i ka chloride stress corrosion pohā. ʻOi aku ka maikaʻi o ka pale ʻana o ka corrosion maʻamau o Monel 400 i nā ʻakika mineral nonoxidizing i ka nickel. Eia nō naʻe, loaʻa iā ia ka nāwaliwali like ʻole o ka hōʻike ʻana i ke kūpaʻa ʻino loa i ka media oxidizing e like me ka ferric chloride, cupric chloride, wet chlorine, chromic acid, sulfur dioxide, a i ʻole ammonia. I loko o ka waiʻona hydrochloric a me ka sulfuric acid dilute ʻaʻole i hoʻoheheʻe ʻia, he kūpaʻa maikaʻi ka huila a hiki i ka 15% ma ka lumi wela a hiki i ka 2% ma kahi kiʻekiʻe kiʻekiʻe, ʻaʻole ma mua o 50°C. Ma muli o kēia ʻano kikoʻī, hoʻohana ʻia ʻo Monel 400 i hana ʻia e NiWire i nā kaʻina hana i hiki ai i nā mea hoʻoheheʻe chlorinated ke hana i ka waika hydrochloric ma muli o ka hydrolysis, ka mea e hoʻopōʻino ai i ke kila kila kila.
Loaʻa iā Monel 400 ke kūpaʻa corrosion maikaʻi ma nā mahana ambient i ka ʻike HF āpau i ka ʻole o ka ea. ʻO nā hāʻina Aerated a me ka wela kiʻekiʻe e hoʻonui i ka nui o ka corrosion. Hiki ke hoʻopaʻa ʻia i ke koʻikoʻi i ka haki ʻana o ka corrosion i loko o ka wai mākū aerated hydrofluoric a i ʻole hydrofluorosilic acid vapor. Hiki ke hōʻemi ʻia kēia ma o ka hoʻohaʻahaʻa ʻana i nā kaiapuni a i ʻole ka hoʻoluhi ʻana i ka anneal o ka mea i nīnau ʻia.
ʻO nā noi maʻamau nā ʻāpana valve a me nā ʻāpana, nā propeller shafts, nā mea pono moana a me nā mea hoʻopaʻa, nā ʻāpana uila, nā mea hana kemika, nā ʻaila a me nā pahu wai hou, nā mea hana ʻaila, nā mea hoʻomehana wai paila a me nā mea hoʻololi wela.
Hoʻohui Kimia

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