Passivation – He Kaʻina Hana Ili

Passivation – He Kaʻina Hana Ili

Hōʻike hope loa 08/29, manawa e heluhelu ai:5mins

Nā ʻāpana ma hope o ke kaʻina hana passivating

ʻO kekahi o nā pilikia koʻikoʻi no ka poʻe metallurgists, ʻo ia ka pale ʻana i nā mea mai ka corrosion a me nā mea haumia ʻē aʻe o nā kaʻina hana e like me ka machining, fabricating, a me ka welding e hana ana i nā ʻōpala, inclusions, metal oxides, a me nā kemika, ka momona a me ka aila.Me kēia mau mea, i ka wā e ʻike ʻia ai i ka ea a me ka wai, nui nā metala i pilikia i ka corrosion.ʻO kēia ka mea e hoʻonāwaliwali ai ka ʻāpana metala a loaʻa paha kahi hopena pōʻino i ka wā hana a i ʻole ka hoʻohana hope ʻana o ka huahana.No laila, pono e pale i ka ʻāpana metala mai kēia mau ʻino a me ka corrosion.ʻO kekahi o ia kaʻina hanametala passivation, he kaʻina hana o ka hāʻawi ʻana i kahi ʻāpana oxide lahilahi a kūlikee hoʻohui i ka pale ʻana i ka corrosion, e hoʻolōʻihi i ka hapa ola, e hoʻoneʻe i ka ʻili o ka ʻili, e hōʻemi i ka pilikia o ka ʻāpana a hoʻonui i nā manawa mālama ʻōnaehana.

Pehea e hana ai?

No ka pale ʻana i nā ʻāpana metala ʻē aʻe mai ka corrosion, hoʻohana nui ʻia kahi hana hoʻopau kemika ʻoihana e like me ke kaʻina hana post-fabrication i kapa ʻia ʻo Passivation.Ma kēia kaʻina hana, hoʻohana mau ʻia nā mea ʻokiʻoki māmā e like me ka nitric a me ka waikawa citric.Hiki ke lawe ʻia aku ka hao exogenetic manuahi, sulphides a me nā mea ʻē aʻe mai ka ʻili mai e kēia mau waikawa a hana i kahi papa oxide a i ʻole kiʻiʻoniʻoni e lilo i pale pale.Hoʻemi kēia i ka hiki ke loaʻa ka hopena kemika ma waena o ka mea metala a me ka ea, e hāʻawi i ka pale o ka ʻili mai ka ʻino me ka hoʻololi ʻole i kona helehelena.ʻO ka ʻāpana koʻikoʻi o kēia kaʻina hana ʻo ia ʻaʻole e pili ka waika i ka metala ponoʻī.

Nā ʻanuʻu o ke kaʻina hana Passivating

ʻEkolu mau ʻanuʻu i loko o ke kaʻina hana passivating, kahi e hana ai i kahi ʻāpana ʻokikene lahilahi a ʻano like ʻole ma ka ʻili metala.

KaʻAnuʻu Hana 1: Mea hoʻomaʻemaʻe

ʻO ka hoʻomaʻemaʻe ʻana i ka ʻāpana metala, ʻo ia hoʻi, ka wehe ʻana i nā aila ʻili, nā kemika a i ʻole nā ​​ʻōpala i koe mai ka mīkini ʻana ʻo ia ka hoʻomaka o ke kaʻina hana passivation.He kuleana koʻikoʻi ka hoʻomaʻemaʻe ʻāpana i kēia kaʻina hana, me ka ʻole o kēia kaʻina, ʻo nā mea ʻē aʻe ma ka ʻili o ka metala e kaupalena i ka pono o ka passivation.

KaʻAnuʻu 2: ʻAkaʻauʻau wai immersion

No ka wehe ʻana i nā ʻāpana hao manuahi mai ka ʻili, ʻo ka hoʻokomo ʻia ʻana o ka mea i loko o ka ʻauʻau waika ma hope o ka hoʻomaʻemaʻe ʻana.ʻEkolu mau ala maʻamau i hoʻohana ʻia i kēia kaʻina hana

KaʻAnuʻu 3:ʻauʻau Nitric Acid

ʻO ke ala kuʻuna i ka passivation ʻo ka Nitric acid, ka mea e hāʻawi hou i ke ʻano molekala o ka ʻili o ka metala.Eia nō naʻe, ma muli o kona hoʻokaʻawale ʻia ʻana ma ke ʻano he mea pōʻino, loaʻa i ka waikawa nitric kekahi mau drawbacks.Hoʻokuʻu ia i nā kinoea ʻawaʻawa e pōʻino i ke kaiapuni a makemake paha i kahi manawa hana lōʻihi me ka lawelawe kūikawā.

KaʻAnuʻu 4:Nitric Acid me Sodium Dichromate Bath

ʻO ka hoʻohui ʻia ʻana o ka sodium dichromate i loko o ka waikawa nitric e hoʻoikaika i ke kaʻina hana passivation me kekahi mau alloys kikoʻī.He koho maʻamau kēia ala, ʻoiai ka sodium dichromate e hoʻonui ai i nā pōʻino o ka ʻauʻau wai nitric.

ʻauʻau ʻAka Citric

ʻO ka ʻauʻau waika citric ka ʻoi aku ka palekana ma mua o ka waikawa nitric no ke kaʻina hana passivating.ʻAʻole ia e hoʻokuʻu i nā kinoea ʻawaʻawa, ʻaʻole koi i ka lawelawe kūikawā a he ʻano hoʻokipa eco.ʻO nā pūhui o ka passivation acid citric, hoʻopilikia i ka ulu ʻana o nā mea kanu a me nā ʻōpala, kahi i paʻakikī ai e loaʻa ka ʻae.I nā makahiki i hala iho nei, ua hoʻopau nā mea hou i kēia mau pilikia, e lilo ia i kumu kūʻai.

No ka hoʻihoʻi hou ʻana i ke kūpaʻa ʻino o ka metala i kona kūlana maka, me ka nānā ʻole i ke ʻano i hoʻopili ʻia, hana kēia kaʻina ʻauʻau i kahi hopena kemika ma ka ʻili o ka mea.E hoʻohui kēia i kahi ʻāpana lahilahi a ʻano like ʻole o kahi kiʻiʻoniʻoni oxide me ka liʻiliʻi-a-ʻaʻohe mole hao.

Nā Kūlana Passivation

1.  Ka Immersion Tank:E hoʻokomo ʻia ka ʻāpana i loko o kahi pahu i loaʻa ka hopena kemika a he mea maikaʻi ia no ka mālama ʻana i nā papa hana a pau i ka manawa like no ka like ʻana o ka pau ʻana a me ke kūpaʻa maikaʻi loa.

2. Kaapuni:Manaʻo pololei ʻia no ka paipu e lawe i nā wai corrosive, kahi e kahe ai ka hopena kemika ma o kahi ʻōnaehana pipework.

3. Hoʻopā ʻia:Hoʻopili ʻia ka hopena kemika ma ka ʻili o ka mea.ʻO ka hoʻolei ʻana i ka waikawa kūpono a me nā kaʻina hana palekana he mea nui ia no kēia ʻano ʻano hana a he pono ia no ka mālama ʻana ma ka pūnaewele.

4. Hoʻohana Gel:Ma ke kāhili ʻana i nā pastes a i ʻole nā ​​gels i ka ʻili o ka mea, hiki ke hoʻokō ʻia ka mālama lima.He mea maikaʻi ia no ka mālama ʻana i nā welds a me nā wahi paʻakikī ʻē aʻe e pono ai nā kikoʻī manual.

He aha nā mea hiki ke Passivated?

·       Anodizingo Aluminum a me Titanium.

·       ʻO nā mea ferrous e like me ke kila.

·       ʻO ke kila kila, hiki ke loaʻa i kahi chrome oxide.

·       Nikela, loaʻa i kekahi mau noi i ka nickel fluoride.

·       Silicone, Silicone Dioxide i hoʻohana ʻia i ka ʻoihana semiconductor.

Noi o ka Passivating Process

No ka hoʻonui ʻana i ka lōʻihi a me ka lōʻihi, hoʻonui ka nui o nā ʻoihana i nā ʻāpana i hoʻopau ai nā mea hana i ka hana me ke kaʻina passivation.

Lapaʻau:I ka ʻoihana mālama olakino, e hoʻemi i ka hoʻopōʻino ʻino i nā mea lapaʻau, hoʻohana ka poʻe loea i ke kaʻina passivation.ʻO ka ʻāpana oxide ma nā ʻaoʻao passive e pale aku i nā mea haumia microscopic, e alakaʻi ana i kahi maʻemaʻe a maʻemaʻe a maʻalahi hoʻi ka sterilize.

Meaʻai a mea inu:ʻO nā pono hoʻomaʻemaʻe he kumu nui ia no nā ʻoihana he nui. No ka hōʻemi ʻana i ka pilikia o ka corrosion a me ka ʻōpala e hoʻololi i nā mea hana a i ʻole nā ​​​​huahana hope loa, ʻo ka passivation o nā ʻāpana ka mea nui.

ʻOihana Aerospace:ʻO nā ʻāpana e koi ai i ka passivation ʻo nā ʻāpana Stainless Steel, Actuators, Hydraulic Actuators, Landing gear parts, Control rods, Exhaust parts in jet engines a me Cockpit fasteners.

Mea Kaumaha:Na Poepoe a me na mea paa

Koa:ʻO nā pū a me nā lako kaua

ʻĀpana ikehu:Māhele mana a me ka lawe ʻana

ʻO nā pono a me nā pōʻino o ke kaʻina hana Passivating

Pono

·       Ka wehe ʻana i nā mea ʻino i koe ma hope o ka mīkini ʻana

·       Hoʻonui i ka pale ʻana i ka corrosion

·       Hoʻemi i ka pilikia o ka haumia i ka wā o ka hana ʻana

·       Hoʻonui i ka hana ʻāpana

·       Hoʻopau like ʻole a maʻalahi

·       ʻili ʻālohilohi

·       Maʻalahi e hoʻomaʻemaʻe i ka ʻili

Cons

·       ʻAʻole maikaʻi ka passivation i ka wehe ʻana i nā mea haumia mai nā ʻāpana welded.

·       E like me ka mea i hoʻopaʻa ʻia, pono e mālama ʻia ka mahana a me ke ʻano o ka ʻauʻau kemika.E hoʻonui kēia i ke kumukūʻai a me ka paʻakikī o ke kaʻina hana.

·       Hiki i ka wai ʻauʻau ke hoʻopōʻino i kekahi mau mea metala, he haʻahaʻa ka chromium a me ka nickel maʻiʻo.No laila, ʻaʻole hiki ke hoʻololi ʻia lākou.

Nā nīnau nīnau e pili ana i ka Passivation

1.  Ua like anei ka passivation me ka pickling?

ʻAʻole, hoʻoneʻe ke kaʻina Pickling i nā ʻōpala a pau, flux a me nā mea haumia ʻē aʻe mai ka ʻili o nā ʻāpana welded a hoʻomākaukau iā lākou no ka passivation.ʻAʻole hiki i ka pickling ke pale i ke kila mai ka corrosion, hoʻomaʻemaʻe wale ia i ka ʻili no ka passivation.

2.  Hana ʻia ka passivation me ke kila kuhiliʻole?

ʻAʻole, ʻaʻohe mea e like me 100% corrosion-proof.Eia nō naʻe, he lōʻihi ke ola o nā ʻāpana kila kila ma muli o ke kaʻina hana passivation.

3.  He koho anei ka passivation o ke kila kila?

ʻAʻole, he hana koʻikoʻi ka passivation no nā ʻāpana kila kila.Hiki ke hoʻouka ʻia ka ʻāpana mai ka corrosion i kahi manawa pōkole loa me ke kaʻina hana passivating.