ʻO ka Anodizing kahi hana i hoʻohana ʻia e hana i kahi kiʻiʻoniʻoni alumini oxide ma ka ʻili o nā huahana alumini a alumini paha.Hoʻokomo ia i ka hoʻokomo ʻana i ka huahana alumini a alumini paha ma ke ʻano he anode i loko o kahi hopena electrolyte a me ka hoʻopili ʻana i ka uila e hana i ke kiʻi ʻoniʻoni alumini oxide.Hoʻomaikaʻi ʻo Anodizing i ka pale ʻana i ka corrosion, ke kūpaʻa ʻaʻahu, a me nā mea hoʻonaninani o nā profile alumini.I ka wā o ke kaʻina hana anodizing o nā profile alumini, hiki ke loaʻa kekahi mau hiʻohiʻona maʻamau.E hoʻomaopopo mua kākou i nā kumu o nā hemahema kikoʻī.ʻO ka ʻinoʻino, ka ʻauʻau ʻauʻau, ka ua o nā ʻāpana lua, a i ʻole nā hopena galvanic hiki ke alakaʻi i nā hemahema.Ua wehewehe ʻia lākou penei:
1.Acid a alkali etching
Ma mua o ka anodizing, hiki ke ʻino ʻia ka mea alumini e ka waikawa a i ʻole ka wai alkaline, a i ʻole e hoʻopili ʻia e ka ʻakika a i ʻole ka uahi alkaline, e hopena i nā kiko keʻokeʻo kūloko ma ka ʻili.Inā paʻakikī ka ʻinoʻino, hiki ke puka mai nā wahi lua nui.He mea paʻakikī ke hoʻoholo me ka maka ʻike ʻole inā he waika a alkali paha ke kumu o ka corrosion, akā hiki ke ʻike maʻalahi ʻia ma ka nānā ʻana i ka ʻāpana keʻa o ka wahi i ʻino ʻia ma lalo o kahi microscope.Inā poepoe ka lalo o ka lua a me ka ʻole o ka corrosion intergranular, ma muli o ka etching alkali.Inā ʻaʻole maʻamau ka lalo a hele pū me ka corrosion intergranular, me nā lua hohonu, ma muli o ka etching acid.ʻO ka mālama pono ʻole a me ka mālama ʻana i ka hale hana hiki ke alakaʻi i kēia ʻano ʻino.ʻO ka uahi ʻakika mai nā mea hoʻoliʻiliʻi kemika a i ʻole nā huhū ʻakika ʻē aʻe, a me nā mea hoʻomaʻemaʻe organik chlorinated, nā kumu o ka etching acid.Hoʻopili ʻia ka etching alkali maʻamau ma muli o ka hoʻopuehu ʻana a me ka paʻi ʻana o ka mortar, lehu sima, a me ka wai holoi alkaline.Ke hoʻoholo ʻia ke kumu, hiki i ka hoʻoikaika ʻana i ka hoʻokele o nā kaʻina hana like ʻole i ka hale hana ke hoʻoponopono i ka pilikia.
2.Atmospheric corrosion
Hiki i nā kiʻi alumini i ʻike ʻia i ka ea haʻahaʻa ke hoʻomohala i nā kiko keʻokeʻo, e hoʻolike pinepine i ka longitudinally ma nā laina poni.ʻAʻole ʻoi aku ka paʻakikī o ka corrosion atmospheric e like me ka acid a alkali etching a hiki ke hoʻoneʻe ʻia e nā ʻano mechanical a i ʻole ka holoi alkaline.ʻAʻole i ʻike ʻia ka ʻino o ka lewa a hiki ke hana ma kekahi mau ʻili, e like me nā wahi haʻahaʻa haʻahaʻa kahi e hoʻopaʻa maʻalahi ai ka mahu wai a i ʻole ma luna.Ke ʻoi aku ka koʻikoʻi o ka ʻinoʻino o ka lewa, ʻike ʻia ka ʻāpana keʻa o nā lua e like me nā halo hoʻohuli.I kēia hihia, ʻaʻole hiki i ka holoi alkaline ke hoʻopau i nā wahi lua a hiki ke hoʻonui iā lākou.Inā hoʻoholo ʻia ka corrosion atmospheric, pono e nānā ʻia nā kūlana mālama i ka hale hana.ʻAʻole pono e mālama ʻia nā mea alumini ma nā wahi me ka haʻahaʻa haʻahaʻa loa e pale ai i ka condensation o ka wai.Pono e maloʻo ka wahi e waiho ai, a ʻo ka mahana e like me ka hiki.
3.Pepa ʻino (nā kiko wai)
Ke waiho ʻia ka pepa a i ʻole ka pahu pahu ma waena o nā mea alumini a hoʻohana ʻia no ka hoʻopili ʻana, pale ia i ka abrasion.Eia naʻe, inā pulu ka pepa, ʻike ʻia nā kiko ʻino ma ka ʻili o ka alumini.Ke hoʻohana ʻia ka pahu corrugated, ʻike ʻia nā laina maʻamau o nā wahi corrosion ma nā wahi e pili ana me ka papa corrugated.ʻOiai ʻike ʻia nā hemahema i kekahi manawa ma ka ʻili alumini, ʻoi aku ka nui o ka ʻōlelo ʻana ma hope o ka holoi ʻana a me ka anodizing alkaline.He hohonu kēia mau kiko a paʻakikī ke wehe ʻia e ka mīkini holoi a i ʻole ka holoi alkaline.Hoʻokumu ʻia ka ʻino o ka pepa (papa) e nā ion acid, ka nui o SO42- a me Cl-, aia i loko o ka pepa.No laila, ʻo ka hoʻohana ʻana i ka pepa (papa) me ka ʻole o ka chlorides a me ka sulfates a me ka pale ʻana i ke komo ʻana o ka wai, he mau ala kūpono ia e pale ai i ka ʻino pepa (papa).
4. Hoʻomaʻemaʻe wai ʻino (ʻike pū ʻia ʻo snowflake corrosion)
Ma hope o ka holoi ʻana i ka alkaline, ka poni kemika, a i ʻole ka sulfuric acid pickling, inā loaʻa i ka wai holoi ʻana i nā haumia, hiki ke hopena i nā kiko hoku a i ʻole ʻālohilohi ma ka ʻili.He pāpaʻu ka hohonu o ka ʻino.Hana ʻia kēia ʻano ʻino i ka wā i haumia nui ai ka wai hoʻomaʻemaʻe a i ʻole ka haʻahaʻa o ke kahe o ka holoi ʻana.Ua like ia me nā ʻano kristal hau i ka nānā aku, no laila ka inoa ʻo "snowflake corrosion."ʻO ke kumu ka hopena ma waena o nā haumia o ka zinc i loko o ka alumini a me ka SO42- a me Cl- i ka wai hoʻomaʻemaʻe.Inā maikaʻi ʻole ka insulation o ka pahu, hiki i nā hopena galvanic ke hoʻonui i kēia hemahema.Wahi a nā kumu haole, inā ʻoi aku ka nui o ka Zn i loko o ke alumini alumini ma mua o 0.015%, ʻoi aku ka nui o ka Cl- i ka wai hoʻomaʻemaʻe ma mua o 15 ppm, hiki ke hana ʻia kēia ʻano corrosion.ʻO ka hoʻohana ʻana i ka waikawa nitric no ka pickling a i ʻole ka hoʻohui ʻana i ka 0.1% HNO3 i ka wai hoʻomaʻemaʻe hiki ke hoʻopau iā ia.
5.Chloride corrosion
ʻO ka loaʻa ʻana o kahi chloride liʻiliʻi i loko o ka ʻauʻau anodizing sulfuric acid hiki ke alakaʻi i ka corrosion pitting.ʻO ka hiʻohiʻona hiʻohiʻona he mau lua hoku ʻeleʻele hohonu, ʻoi aku ka nui o ka paʻa ma nā kihi a me nā kihi o ka mea hana a i ʻole ma nā wahi ʻē aʻe me nā kiʻekiʻe o kēia manawa.ʻAʻohe kiʻi anodized nā wahi lua, a ʻoi aku ka liʻiliʻi o ka mānoanoa o ke kiʻi ma nā wahi "maʻamau" i koe ma mua o ka waiwai i manaʻo ʻia.ʻO ke kiʻekiʻe o ka paʻakai i loko o ka wai paipu ke kumu nui o Cl- pollution i loko o ka ʻauʻau.
6.Galvanic corrosion
I loko o kahi pahu i hoʻoikaika ʻia (anodizing a i ʻole kala electrolytic), hiki i nā hopena galvanic ma waena o ka mea hana a me ka pahu (pahu kila), a i ʻole nā hopena o ke au ʻauheʻe i loko o kahi pahu wai ikaika ʻole (holoi a hoʻopaʻa ʻia paha), hiki ke hōʻeha a hoʻonui i ka ʻinoʻino.
Hoʻoponopono ʻia e May Jiang mai MAT Aluminum
Ka manawa hoʻouna: Dec-15-2023
