ʻO Galvanic Corrosion he mea hana i kaʻike pono
Hiki ke hoʻopiliʻiaʻo Galvanic corrosion i ka manawa e kokoke kokoke ai nā moaʻelua i ke kohoʻana a pēlā hoʻi i hoʻokomoʻia i loko o ka wai electrolytic (e like me ka wai paʻakai).
Ke hanaʻia kēia, hana nā metala a me ka electrolyte i ka cell galvani. ʻO ka pūpū ka hopena o ka hanaʻana i kekahi mea kila ma kahi lilo o kekahi.
I ke Ala o ka Ala, ua hoʻopiliʻia ka hao ma ka lilo o ke keleawe. Hoʻokahi wale nō mau makahiki ma hope o ke kauʻana i nā pā keleawe, ua hoʻopau nuiʻia nā kui hao i hoʻohanaʻia e hoʻopaʻa i ke keleawe a hiki i kaʻaoʻao o ka moku.
Pehea e hana aiʻo Galvanic Corrosion
ʻO nā kinona a me nā mea āpau i hoʻohuiʻia nā mea likeʻole. ʻO kaʻaeʻana i kaʻikepili a he mau palena keʻano o ka mea kila e hoʻoikaika ai i kahi electrolyte i hāʻawiʻia. ʻO kaʻoi aku o kaʻoi o ka hana, aʻole ka liʻiliʻi o ke kūlana kiʻekiʻe,ʻo ka meaʻoi aku paha kaʻoi aku o ka hanaʻana i ka anode (pono ka papa koho) i kahi'ōnaehana electrolytic. ʻO ka mea liʻiliʻi, aʻoi aku kaʻoi aku o ke kila,ʻoi aku ka hanaʻana i ka catopde (keʻole i ke kohoʻiaʻana o ka electrode) i ka manawa hoʻokahi.
Hana ka mea electrolyte i ke kahe no ka neʻeʻana o ka moana, e hoʻohuli i nā kinona mau mai ka anode i ka cathode. ʻO ke kinona anode, ma muli o ka hopena, eʻoi aku ka wikiwiki aʻe o nā huapuni ma mua aʻe o ka hanaʻana,ʻoiai e hoʻopōleʻa ikiʻia ana ka kila cathode, a ma kekahi mauʻano,ʻaʻole loa e hōʻinoʻia.
I ke Ala o ka Ala , ua hana ke kila o ka hanohano nui (keleawe) ma keʻano he cathode,ʻoiai ka haoʻoi aku kaʻoi o ke anode.
Ua lilo nā kini liona ma ka lilo o ke keleawe, aʻo ka hope loa o ka piʻiʻana o nā kui.
Pehea e palekana ai i ke olakino Galvanic
Me kaʻike o kēia manawa i kaʻinoʻino o ka moku, ua hoʻolālāʻia nā moku e kālaiʻia me nā 'sacrificial anodes',ʻaʻole e pili pono i ka hanaʻana o ka moku, akā, e mālama ia i nā papa hana o ka moku. Hanaʻia nā anodes i mōhai i ka zinc a me ka magnesium , nā metala me nā mea liʻiliʻi loa o ka electrode. E like me ke kaumahaʻana o nā anodes a me ke kaumaha, pono e paniʻia.
I mea eʻike ai i keʻano o ka mea keleawe e lilo i anode a me ka hanaʻana e like me ka cathode i nā wahi electrolytic, pono kākou e hoʻomaopopo i nā kūlana o ka'ōpili a iʻole ka mana o nā pono. Hoʻohālikelikeʻia kēia i ka mea e pili ana i ke Kelekia Calomel Standard (SCE).
Hiki keʻikeʻia he papa o nā metala, i hoʻonohonohoʻia e like me ka mana o ka electrode (nobility) i ka wai kai eʻikeʻia i ka papa ma lalo nei.
Pono e kuhikuhiʻia i ka hōʻinoʻiaʻana o kaʻinoʻino maʻamau i ka wai wale nō. Hiki i nā kinipona Galvanic ke hana i loko o nā mea electrolyte, e like me ka ea a me ka lepo, a me nā wahiʻokoʻa.
ʻO Ke Galvanic Series Ma ke Kai Kai Eʻe
| Keʻena'ElepiliʻOle | Nā Pono Pono, Volts (Keʻena Calomel Half-Cell) |
| Hōʻike | +0.25 |
| Paʻapala | +0.15 |
| Zirconium | -0.04 |
| ʻAno 316 Kūkino (Kinoʻole) | -0.05 |
| ʻAno 304 Pāʻona (Kinoʻole) | -0.08 |
| Monel 400 | -0.08 |
| Hana i ka C | -0.08 |
| Titanium | -0.1 |
| ʻO ke kālā | -0.13 |
| Kelepona 410 Kūkino (Palolo) | -0.15 |
| ʻAno 316 Kūkino (Pono) | -0.18 |
| Nickel | -0.2 |
| Hana 430 Kūkino (Palolo) | -0.22 |
| ʻOihana 717 (70-30 Cupro-Nickel) | -0.25 |
| Kohu Alina 706 (90-10 Cupro-Nickel) | -0.28 |
| Kalapu Kino 443 (Admiralty Brass) | -0.29 |
| G Bronze | -0.31 |
| Kalapu Kino 687 (Aluminum Brass) | -0.32 |
| Kohe | -0.36 |
| Kalapu 464 (Naval Rolled Brass) | -0.4 |
| Kelepona 410'Okawela (Active) | -0.52 |
| ʻAnoʻano 304 Kūpanaha (Manawa) | -0.53 |
| Hana 430'Okila (Pono) | -0.57 |
| Kamalāpili | -0.61 |
| Lulu ka hao | -0.61 |
| Aluminum 3003-H | -0.79 |
| Zinc | -1.03 |
Kumu: ASM Handbook, Vol. 13, Corrosion of Titanium and Titanium Alloys, p. 675.