Manaʻo ka hapa nui o ke kila kila he mea metala ʻaʻole ia e ʻōpala a ʻaʻole kū i ka waika a me ka alkali. Akā i ka nohona o kēlā me kēia lā, ʻike ka poʻe i nā ipu hao kila a me nā ipu uila i hoʻohana ʻia no ka kuke ʻana, loaʻa pinepine nā wahi ʻōpala a i ʻole nā wahi ʻōpala. He aha ka mea e hana nei?
E hoʻomaopopo mua kākou, he aha ke kila kila?
Wahi a ka National Standard GB/T20878-2007 "Stainless Steel and Heat-Resistant Steel Grades and Chemical Compositions", ʻo ka wehewehe ʻana o ke kila kila: ʻo ke kila kila a me ke kūpaʻa corrosion e like me nā hiʻohiʻona nui, me ka chromium maʻiʻo o ka liʻiliʻi 10.5% a me kahi maʻi kalapona ʻaʻole ʻoi aku ma mua o 1.2%. kila. ʻO nā ʻano ʻano kūʻē i ka media corrosion kemika (acid, alkali, paʻakai, a me nā mea ʻē aʻe) ua kapa ʻia ʻo ke kila kūpaʻa waikawa.
No laila, no ke aha e pale ai ke kila kuhiliʻole i ka corrosion?
No ka mea, ma hope o ka hoʻokumu ʻia ʻana, e loaʻa i ka pickling piha a me ka passivation e wehe i nā ʻano ʻaila a pau, ka ʻōpala a me nā lepo ʻē aʻe ma ka ʻili. E lilo ka ʻili i ke kālā like ʻole, e hana ana i kahi kiʻiʻoniʻoni passivation ʻaʻahu, no laila e hōʻemi i ke kūʻē ʻana o ke kila kila i ka media oxidizing. ʻOi aku ka nui o ka corrosion a hoʻomaikaʻi i ka pale ʻana i ka corrosion.
No laila me kahi kiʻiʻoniʻoni passivation ma ke kila kila, ʻaʻole anei ia e pala?
ʻO ka ʻoiaʻiʻo, i ko mākou ola i kēlā me kēia lā, ʻo nā ion chloride i loko o ka paʻakai he hopena hoʻopōʻino i ke kiʻiʻoniʻoni passive o ke kila kila, hiki ke kumu i ka ua o nā mea metala.
I kēia manawa, ma ka manaʻo, ʻelua ʻano o ka pōʻino i ke kiʻi passivation i hana ʻia e nā ion chlorine:
1. Ka manaʻo kiʻiʻoniʻoni Phase: Loaʻa i nā ion Chloride kahi radius liʻiliʻi a me ka hiki ke komo ikaika. Hiki iā lākou ke komo maʻalahi i nā āpau liʻiliʻi loa i loko o ke kiʻiʻoniʻoni oxide, hiki i ka ʻili metala, a hui pū me ka metala e hana i nā pūhui hoʻoheheʻe, e hoʻololi i ke ʻano o ke kiʻi oxide.
2. Adsorption theory: He mana ikaika ko Chloride iions e hoʻopili ʻia e nā metala. Hiki ke hoʻopili ʻia e nā metala a hoʻokuʻu aku i ka oxygen mai ka ʻili metala. E hoʻokūkū nā ion chloride a me nā oxygen no nā helu adsorption ma ka ʻili metala a hana i ka chloride me ka metala; ʻAʻole paʻa ka adsorption o ka chloride a me ka metala, e hana ana i nā mea hiki ke hoʻoheheʻe ʻia, e alakaʻi ana i ka corrosion wikiwiki.
No ka nānā ʻana i ke kila kila:
Hoʻokaʻawale ʻia ka nānā ʻana i ke kila kila i ʻeono mau hoʻokolohua hana a me ʻelua mau papahana loiloi
Ka ho'āʻo hana:
Nā waiwai kino, nā waiwai kemika, nā waiwai mechanical, ka hiki ke kaʻina hana, ka nānā ʻana i ka metallographic a me ka nānā ʻole luku ʻole.
Pāhana Kālā:
ʻO ka nānāʻana i ka haʻihaʻi, kaʻinoʻino, a pēlā aku;
Ma waho aʻe o nā kūlana i hoʻohana ʻia e hoʻokaʻawale i ka GB / T20878-2007 "Stainless Steel and Heat-Resistant Steel Grades and Chemical Compositions", aia kekahi:
GB/T 13305
GB/T 13671
GB/T 19228.1, GB/T 19228.2, GB/T 19228.3
GB/T 20878 Ke kila kila a me ka wela-pale kila mākau a me nā haku mele
ʻO ke kūlana aupuni no ka nānā ʻana i ke kila kila kila ʻai ʻo GB9684-2011 (nā huahana kila ʻole). Hoʻokaʻawale ʻia ka nānā ʻana o ke kila kila kila i ʻelua mau ʻāpana: nā mea nui a me nā mea pono ʻole.
Pehea e hana ai:
1. Mākaʻikaʻi: Pono ka hoʻāʻo ʻana i ke kila kila e kaha i nā wēlau o nā mea hoʻāʻo me ka pena o nā kala like ʻole.
2. Paʻi: ʻO keʻano o ka hoʻouluʻana i ka pena ma nā'āpana (nā hopena, nā maka hope) i'ōleloʻia i ka nānāʻana, e hōʻike ana i ka papa, ke kūlana, nā kiko'ī, a me nā mea'ē aʻe o ka mea.
3. Tag: Ma hope o ka pau ʻana o ka nānā ʻana, e hoʻokomo ʻia nā mea i loko o nā pūʻolo, pahu, a me nā kumu e hōʻike ai i kona pae, nui, kaumaha, helu maʻamau, mea hoʻolako, etc.
Ka manawa hoʻouna: Dec-27-2023