ʻO ka ʻenehana pale Cathodic kahi ʻano o ka ʻenehana pale electrochemical, kahi e hoʻopili ai i kahi ʻano o waho i ka ʻili o ka hale metala i hoʻopili ʻia. Lilo ka hale i pale ʻia i ka cathode, no laila ke kāohi nei i ka neʻe ʻana o ka electron i ka wā o ka corrosion metala a pale a hōʻemi paha i ka hiki ʻana o ka corrosion.

Hiki ke hoʻokaʻawale ʻia ka ʻenehana pale cathodic i ka pale cathodic anode a me ka pale cathodic i kēia manawa. ʻO kēia ʻenehana ke kumu oʻo a hoʻohana nui ʻia no ka hoʻomalu ʻana i ka corrosion o nā hale metala e like me nā paipu kila, nā paila wai, nā kaula, nā awa, nā moku, nā pahu pahu, nā mea hoʻoluʻu, etc.

ʻO ka palekana cathodic sacrificial anode ke kaʻina hana o ka hoʻohui ʻana i ʻelua metala me nā hana like ʻole a kau iā lākou i ka electrolyte like. ʻO ka metala ʻoi aku ka ikaika e nalowale i nā electron a ua ʻino ʻia, ʻoiai ʻo ka metala liʻiliʻi e loaʻa i ka pale electron. Ma muli o ka corrosion o nā metala ikaika loa i kēia kaʻina hana, ua kapa ʻia ʻo ia ka pale cathodic anode sacrificial.

Loaʻa ka pale cathodic o waho i kēia manawa ma o ka hoʻololi ʻana i ka hiki o ke kaiapuni a puni ma o kahi kumu mana o waho, no laila e noho haʻahaʻa ka hiki o nā mea hana e pale ʻia ma mua o ke kaiapuni a puni, a laila lilo i cathode o ke kaiapuni holoʻokoʻa. Ma kēia ala, ʻaʻole e ʻino nā mea hana e pale ʻia ma muli o ka nalowale o nā electrons.

Kuʻuna hana

E hoʻohana i ke keleawe a me ka alumini e like me nā anodes a me ka ʻōnaehana mea pale e like me nā cathodes. ʻO nā ion keleawe i loaʻa mai ka electrolyzing copper anodes he mea ʻawaʻawa a hana i kahi ʻona i ka wā i hui ʻia me ka wai kai. Hoʻokumu ka anode alumini electrolytic i ka Al3+, ka mea i hoʻokumu iā Al (OH) 3 me ka OH - i hana ʻia e ka cathode. Hoʻopili kēia ʻano l (OH) 3 i nā ion keleawe i hoʻokuʻu ʻia a kahe i loko o ka ʻōnaehana pale me ka wai kai. Loaʻa iā ia ka mana adsorption kiʻekiʻe a hiki ke pālahalaha aku i nā wahi me ke kahe ʻana o ka wai kai kahi e noho ai nā mea ola kai, e pale ana i ko lākou ulu ʻana. Ke hoʻoheheʻe ʻia ka ʻōnaehana anode keleawe keleawe i ka wai kai, ua hoʻokumu ʻia kahi papa nui o ka calcium a me ka magnesium ma ka ʻaoʻao o loko o ka pipeline kila e like me ka cathode, a ʻo ka alumini hydroxide colloid i hana ʻia e ka electrolysis kahe me ka wai kai, e hana ana i kahi kiʻi pale ma ka paia o loko o ka pipeline. ʻO ka calcium magnesium coating a me ka alumini hydroxide colloidal film e hoʻopaʻa i ka diffusion o ka oxygen, hoʻonui i ka polarization, a lohi i ka helu corrosion, hiki ke hoʻokō i ke kumu o ka anti fouling a me ka anti-corrosion.