Hoʻokumu ʻana i ka Metal Passivation a me ka mānoanoa o ka Passivation Film

Ua wehewehe ʻia ka passivation e like me ke kūkulu ʻana i kahi ʻāpana pale lahilahi loa ma ka ʻili o kahi mea metala ma lalo o nā kūlana oxidizing, i loaʻa i ka polarization anodic ikaika, e kāohi i ka corrosion.Hoʻokumu kekahi mau metala a i ʻole nā ​​​​mea hoʻoheheʻe i kahi papa keʻakeʻa maʻalahi i ka hiki ke hoʻāla a i ʻole ma lalo o ka polarization anodic nāwaliwali, a laila e hōʻemi ana i ka nui o ka corrosion.Wahi a ka wehewehe ʻana o ka passivation, ʻaʻole hāʻule kēia kūlana ma lalo o ka passivation.

He lahilahi loa ke ʻano o ka kiʻiʻoniʻoni passivation, me ke ana mānoanoa mai 1 a 10 nanometers.ʻO ka ʻike ʻana o ka hydrogen i loko o ke kiʻi ʻoniʻoni ʻoniʻoni e hōʻike ana he hydroxide a i ʻole hydrate paha ke kiʻi passivation.He paʻakikī ka hao (Fe) e hana i kahi kiʻiʻoniʻoni passivation ma lalo o nā kūlana corrosion maʻamau;hiki wale ia ma nā kaiapuni oxidizing nui a ma lalo o ka polarization anodic i nā mea hiki ke kiʻekiʻe.ʻO ka ʻokoʻa, hiki i ka chromium (Cr) ke hana i kahi kiʻiʻoniʻoni passivation paʻa, paʻa, a pale hoʻi i loko o nā kaiapuni oxidizing haʻahaʻa.I loko o nā mea hao i loaʻa i ka chromium, ke ʻoi aku ka nui o ka chromium ma mua o 12%, ua kapa ʻia ʻo ia he kila kila.Hiki i ke kila kila ke mālama i kahi kūlana passivated i loko o ka hapa nui o ka wai i loaʻa ka nui o ka ea.ʻO Nickel (Ni), i hoʻohālikelike ʻia me ka hao, ʻaʻole wale ka maikaʻi o nā waiwai mechanical (me ka ikaika o ka wela kiʻekiʻe) akā hōʻike pū kekahi i ke kūpaʻa corrosion maikaʻi loa i ka non-oxidizing.

Hoʻokumu ʻana i ka Metal Passivation a me ka mānoanoa o ka Passivation Film

Ua wehewehe ʻia ka passivation e like me ke kūkulu ʻana i kahi ʻāpana pale lahilahi loa ma ka ʻili o kahi mea metala ma lalo o nā kūlana oxidizing, i loaʻa i ka polarization anodic ikaika, e kāohi i ka corrosion.Hoʻokumu kekahi mau metala a i ʻole nā ​​​​mea hoʻoheheʻe i kahi papa keʻakeʻa maʻalahi i ka hiki ke hoʻāla a i ʻole ma lalo o ka polarization anodic nāwaliwali, a laila e hōʻemi ana i ka nui o ka corrosion.Wahi a ka wehewehe ʻana o ka passivation, ʻaʻole hāʻule kēia kūlana ma lalo o ka passivation.

He lahilahi loa ke ʻano o ka kiʻiʻoniʻoni passivation, me ke ana mānoanoa mai 1 a 10 nanometers.ʻO ka ʻike ʻana o ka hydrogen i loko o ke kiʻi ʻoniʻoni ʻoniʻoni e hōʻike ana he hydroxide a i ʻole hydrate paha ke kiʻi passivation.He paʻakikī ka hao (Fe) e hana i kahi kiʻiʻoniʻoni passivation ma lalo o nā kūlana corrosion maʻamau;hiki wale ia ma nā kaiapuni oxidizing nui a ma lalo o ka polarization anodic i nā mea hiki ke kiʻekiʻe.ʻO ka ʻokoʻa, hiki i ka chromium (Cr) ke hana i kahi kiʻiʻoniʻoni passivation paʻa, paʻa, a pale hoʻi i loko o nā kaiapuni oxidizing haʻahaʻa.I loko o nā mea hao i loaʻa i ka chromium, ke ʻoi aku ka nui o ka chromium ma mua o 12%, ua kapa ʻia ʻo ia he kila kila.Hiki i ke kila kila ke mālama i kahi kūlana passivated i loko o ka hapa nui o ka wai i loaʻa ka nui o ka ea.ʻO Nickel (Ni), i hoʻohālikelike ʻia me ka hao, ʻaʻole wale ka ʻoi aku ka maikaʻi o nā waiwai mechanical (me ka ikaika wela kiʻekiʻe) akā hōʻike pū kekahi i ke kūpaʻa corrosion maikaʻi loa i nā kaiapuni non-oxidizing a me ka oxidizing.Ke oi aku ka nickel ma loko o ka hao ma mua o 8%, hoʻokūpaʻa ia i ke ʻano cubic o ka austenite, e hoʻonui hou i ka hiki passivation a hoʻomaikaʻi i ka pale corrosion.No laila, ʻo ka chromium a me ka nickel nā mea hoʻohui koʻikoʻi i ka steel.and oxidizing environment.Ke oi aku ka nickel ma loko o ka hao ma mua o 8%, hoʻokūpaʻa ia i ke ʻano cubic o ka austenite, e hoʻonui i ka hiki passivation a hoʻomaikaʻi i ka pale corrosion.No laila, ʻo ka chromium a me ka nickel nā mea hoʻohui koʻikoʻi i ke kila.