ʻO nā wili i hoʻohana pinepine ʻia i nā kaʻina hana lapaʻau ʻiliʻokikene, electrophoresis, electroplating, Dacromet ʻehā mau māhele, ʻo kēia ka mea nui e hoʻowali i kakala o ka mālama ʻana i ka ʻili o ka hōʻuluʻulu manaʻo hoʻokaʻawale.
- ʻeleʻele ʻokikene：
Ua māhele ʻia i ka ʻeleʻele ʻana i ka mahana o ka lumi a me ka ʻeleʻele ʻana i ka mahana kiʻekiʻe, i ka ʻeleʻele ʻana i ka mahana o ka lumi ma ke ʻano he laʻana o ke kaʻina hana: ka hoʻohemo kemika - ka holoi ʻana i ka wai wela - ka holoi ʻana i ka wai anuanu - ka wehe ʻana i ka popo a me ka ʻoki ʻakika - ka hoʻomaʻemaʻe ʻana - ka hoʻomaʻemaʻe ʻana - ka hoʻomaʻemaʻe ʻana - ma luna o ka ʻaila a i ʻole ma luna o ka pani ʻia. He papa ia o ka ʻili oxide i hana ʻia e ka sodium hydroxide a me ka sodium nitrite ma kahi mahana kiʻekiʻe ma mua o 100 degere.
ʻO ka ʻāpana nui o ka ʻili oxide ka hao tetraoxide (Fe3C4), ʻo ke ʻano like o ka ʻili he 0.6-1.5um wale nō, ʻaʻole maikaʻi ke kūpaʻa ʻana i ka pala, i ka hihia ʻaʻole ma luna o ka ʻaila a i ʻole ka pani paʻakai kūlike ʻole no 1-2 mau hola wale nō, ma luna o ka ʻaila i loko o 3-4 mau hola a i ʻole. ʻAʻole hoʻohana nā mīkini liʻiliʻi i kēia kaʻina hana no nā wili. ʻOkoʻa mai ke ʻano o ke kala, ʻeleʻele oxide a me ka zinc ʻeleʻele a me ka pani ʻeleʻele electrophoretic, akā ʻaʻole i ʻālohilohi e like me ka zinc ʻeleʻele a me ke kala ʻeleʻele electrophoretic.
- Hoʻoheheʻe ʻia：
ʻElua ʻano zinc ʻeleʻele a me ka nickel ʻeleʻele o ka electroplating ʻeleʻele, ʻo ke kumu o ke kaʻina hana like like, ʻo ka hoʻokumu ʻana o ka hopena electroplating a me ka post-treatment me nā lattice like ʻole a i ʻole ka passivation solution. He hana kemika ka Zinc, maʻalahi ke oxidise a me ka pouli i ka lewa, a ma hope e hana i ka corrosion 'white rust', zinc plating ma hope o ka mālama ʻana i ka chromate i mea e uhi ai i kahi papa o ka zinc ma luna o ka ʻili hoʻololi kemika, i mea e noho ai ka metala hana i kahi kūlana passive, ʻo ia ka passivation o ka papa zinc. Mai ke ʻano, hiki ke hoʻokaʻawale ʻia ka ʻili passivation i ka passivation keʻokeʻo (zinc keʻokeʻo), uliuli māmā (zinc polū), passivation ʻeleʻele (zinc ʻeleʻele), passivation ʻōmaʻomaʻo koa (zinc ʻōmaʻomaʻo) a pēlā aku.
- ʻEleʻele Electrophoresis：
Ke hoʻohana nei i ke ʻano electrochemical e waiho i nā ʻāpana colloidal o ka resin organik ma nā ʻāpana e hana i kahi papa uhi organik o nā kala like ʻole, hoʻohana nui ʻia ka electrophoresis ʻeleʻele i ka ʻoihana, e lawe i ke kaʻina hana ʻeleʻele ma ke ʻano he laʻana: degreasing-cleaning-phosphating-electrophoresis pena-maloʻo. Hiki ke hoʻokaʻawale ʻia i ka electrophoresis anodic (resin ionization i nā ions maikaʻi ʻole) a me ka electrophoresis cathodic (resin electrophoresis i nā ions maikaʻi), a ʻo ke kaʻina hana pena i hoʻohālikelike ʻia me ka hana kūkulu ʻana he maikaʻi, haumia a me ka hōʻino i ke kaiapuni e hōʻemi i kona kūʻē ʻana i ka hana pīpī paʻakai neutral i loko o 300 mau hola a ʻoi aku paha, ʻo ke kumukūʻai a me ke kūʻē ʻana i ka corrosion a me ke kaʻina hana Dacromet ua like.
- Keʻokeʻo zinc：
ʻO ke kaʻina hana electroplating: degreasing - hoʻomaʻemaʻe - hoʻoulu ʻana i ka waikawa nāwaliwali - electroplating zinc - hoʻomaʻemaʻe - passivation keʻokeʻo lauoho - hoʻomaʻemaʻe - hoʻomaloʻo, ʻaʻohe ʻokoʻa o ka zinc ʻeleʻele ma luna o ka lat rack a me ka passivation solution. ʻO ka passivation keʻokeʻo he kiʻiʻoniʻoni zinc oxide aniani ʻole kala, kokoke ʻaʻohe chromium, no laila ʻoi aku ka maikaʻi ʻole o ke kūpaʻa corrosion e pili ana i ka zinc ʻeleʻele, zinc polū, zinc kala, ʻoi aku ka maikaʻi ʻole o ke kūlana ʻoihana i 6-12 mau hola. Hiki i kēia mea hana plating ke hoʻomaikaʻi i ka pololei o ka ratio o ka passivation solution e pale aku i ka paʻakai neutral no kahi o 20 mau hola.
Ma muli o ke kaʻina hana lapaʻau ʻili o nā wili hao keʻokeʻo e hana i ka hoʻāʻo pīpī paʻakai kūlike ʻole i ʻike mua ʻia ma ka ʻili o ka plating corrosion keʻokeʻo, ʻo ka hanana ʻulaʻula ka popo ma kahi o 40 mau hola, no laila ʻoi aku ka maikaʻi o ke kūpaʻa ʻana i ka zinc keʻokeʻo ma mua o ka nickel keʻokeʻo. Hoʻohālikelike ʻia ke ʻano me ka nickel keʻokeʻo ʻeleʻele, ʻōmaʻomaʻo keʻokeʻo ke kala mua o ka zinc, a ʻoi aku ka ʻokoʻa o ka nickel keʻokeʻo i hoʻohālikelike ʻia me ka nickel keʻokeʻo.
- Nikala Keʻokeʻo：
ʻO ke kaʻina hana Plating: degresing - hoʻomaʻemaʻe - hoʻoulu ʻana o ka waikawa nāwaliwali - hoʻomaʻemaʻe - lalo keleawe - hoʻoulu - hoʻomaʻemaʻe - electroplating nickel- Hoʻomaʻemaʻe - passivation - hoʻomaʻemaʻe - maloʻo - a pani ʻia, a ʻo ke kaʻina hana nickel ʻeleʻele ke ʻano like, ʻokoʻa ke ʻano o ka hoʻonā plating, emi ka zinc sulfide a hui pū. He metala melemele kālā-keʻokeʻo ʻo Nickel, no ka helehelena maikaʻi, e hui pū me ka nickel-plated brightener. ʻAʻole nui ka ʻokoʻa o kona kūpaʻa i ka corrosion a me ka nickel ʻeleʻele 6-12 mau hola, e kau pū ʻia ke kaʻina hana o nā mea hana maʻamau ma luna o ka aila a pani ʻia paha, e like me ka noʻonoʻo ʻana i ka hopena o ka corrosion ma nā ʻāpana plastik o ka mea e hiki mai ana e hoʻohana ʻia ma ke ʻano he mea e kālele ana i ka kaohi ʻana inā ʻaʻole ma luna o ka aila.
- Kini polū, kini ʻōmaʻomaʻo：
ʻO ke kaʻina hana ua like ia me ka zinc keʻokeʻo, ʻo ka zinc polū he passivated zinc oxide film aia i loko he 0.5-0.6mg/dm2 o trivalent chromium. ʻO ka passivation ʻōmaʻomaʻo, i ʻike ʻia hoʻi he passivation ʻelima-ʻakika, hiki ke loaʻa kahi kiʻiʻoniʻoni mauʻu-ʻōmaʻomaʻo mānoanoa, aia ka hopena passivation i nā ion phosphate, ʻo ka hopena o ka kiʻiʻoniʻoni mauʻu-ʻōmaʻomaʻo ʻālohilohi he kiʻiʻoniʻoni pale paʻakikī, paʻakikī o nā chromates a me nā phosphates.
No kona kūpaʻa ʻana i ka pala, ʻoi aku ka maikaʻi o ka zinc polū ma mua o ka zinc keʻokeʻo, ʻoiai ʻoi aku ka maikaʻi o ka zinc ʻōmaʻomaʻo ma mua o ka zinc polū. He polū iki ke kala o ka zinc polū a kokoke loa ka zinc keʻokeʻo i ka ʻoihana e hoʻohana hou aku, hiki ke hoʻohana ʻia ka mea hope ma ke ʻano he hoʻolālā huahana i ka wā e hoʻohana ai i ke kaʻina hana ʻē aʻe o nā wili.
- ʻO ka zinc enamel (kemika)：
Ma ke ʻano galvanizing o ke kaʻina hana o ka zinc kala he kūpaʻa maikaʻi loa ia i ka palaho, ʻo kāna kaʻina hana passivation kala: galvanizing - hoʻomaʻemaʻe - 2% - 3% nitric acid mai ka mālamalama - hoʻomaʻemaʻe - passivation kala chromium haʻahaʻa - hoʻomaʻemaʻe - ʻelemakule Baking. Haʻahaʻa loa ka mahana passivation, lohi ka ʻili, lahilahi ka ʻili palupalu. Mahana kiʻekiʻe, mānoanoa a wehe ka ʻili, ʻaʻole paʻa pono. ʻOi aku ka maikaʻi o ka hoʻomalu ʻana ma kahi o 25 degere e hōʻoia i ka loaʻa ʻana o ke kala like i loko o kekahi manawa.
Ma hope o ka passivation, pono e hoʻomoʻa ʻia a hoʻomaʻamaʻa ʻia e hoʻomaikaʻi i ke kūpaʻa a me ke kūpaʻa ʻana i ka pala o ke kiʻiʻoniʻoni. E kala i nā wili i uhi ʻia me ka zinc ma ka hoʻopā ʻana i ka lalo o ke kūpaʻa i ka pīpī paʻakai kūlike i loko o 48 mau hola, hiki ke hana ʻia ka kaohi maikaʻi ma mua o 100 mau hola.
- ʻO Dacromet：
ʻO ia ka pōkole a me ka unuhi ʻana o DACROMET, ʻo ia hoʻi ka uhi pale paʻakai chromium zinc-based flaky, i kapa ʻia hoʻi ʻo zinc-aluminium coating. ʻO ke kaʻina hana maʻamau: degreasing - degreasing - coating - preheating - sintering - cooling. ʻO ka maʻamau, he 2-4 mau manawa ka hana mai ka uhi ʻana a i ke kaʻina hoʻoluʻu, no ka mea, pono e hana hou ʻia nā wili me ka uhi dip e like me ka hoʻokō ʻana i kahi mānoanoa.
Aia ke ʻano ma luna o ka ʻili metala, i uhi ʻia me kahi papa o ka hopena Dacromet (ʻo ia hoʻi, aia nā unahi o ka zinc, alumini [ʻo ka nui o nā unahi he 0.1-0.2X10-15 microns] Cr03 a me nā mea organik kūikawā o ka hopena wai i hui pū ʻia), ma 300 ° C a i ʻole ka mālama ʻana i ka wela e hoʻomoʻa ana no kekahi manawa, ua hoʻemi ʻia ka wai Dacromet i loko o ka chromium hexavalent i chromium trivalent, e hopena ana i nā hui chromate composite amorphous (nCr03) mCr203).
He maikaʻi loa ke kūpaʻa ʻana i ka palaho me ka paʻakai kūlike a hiki i 300 mau hola a ʻoi aku paha, ʻaʻole like ka hemahema o ka uhi ʻana, kūlana lahilahi o 5-10um, kūlana mānoanoa o 40um a pēlā paha, e hoʻopilikia ia i ka hohonu o ke anawaena o ka wili, no laila he maikaʻi loa ka hoʻohana ʻana i ke kaʻina hana Dacromet no ka ʻoki ʻana i nā wili a me nā wili me ke anawaena liʻiliʻi.
Ka manawa hoʻouna: Sep-18-2024
