Kaʻina hana lapaʻau uka

ʻO nā kaʻina hana lapaʻau i hoʻohana mau ʻiaoxidation, electrophoresis, electroplating, Dacromet ʻehā waeʻano, ʻo kēia ka mea nui e wili i kakala kala o ka lapaau ili ana o ka helu helu.

• ʻeleʻele oxide：

Hoʻokaʻawale ʻia i loko o ka lumi wela ʻeleʻele a me ke kiʻekiʻe wela ʻeleʻele, i ka lumi wela ʻeleʻele ma ke ʻano he laʻana o ke kaʻina hana: chemical degreasing - holoi wai wela - holoi wai anuanu - wehe ʻia ka rust a me ka etching acid - hoʻomaʻemaʻe - ʻeleʻele - hoʻomaʻemaʻe -Ma luna o ka ʻaila a i ʻole pani ʻia. He papa ia o ke kiʻi oxide i hana ʻia e ka sodium hydroxide a me ka sodium nitrite ma kahi wela kiʻekiʻe ma mua o 100 degere.

ʻO ka mea nui o ke kiʻi oxide he hao tetraoxide (Fe3C4), he 0.6-1.5um wale ke kiʻi ʻoniʻoni, ʻilihune ka pale ʻana o ka corrosion, inā ʻaʻole ma luna o ka ʻaila a i ʻole ka paʻakai paʻakai paʻa i ka 1-2 mau hola a i ʻole, ma luna o ka ʻaila i 3-4 mau hola. ʻAʻole hoʻohana nā mea hana liʻiliʻi i kēia kaʻina hana no ka manawa. Hoʻokaʻawale ʻia mai ke ʻano o ke kala, ʻeleʻele oxide a me ka zinc ʻeleʻele a me ka electrophoretic ʻeleʻele kokoke, akā ʻaʻole like me ka ʻeleʻele zinc a me ke kala ʻeleʻele electrophoretic.

• Galvanize：

ʻElua ʻano o ka zinc ʻeleʻele a me ka nickel ʻeleʻele, ʻo ke kumu o ke kaʻina hana, ʻo ka hoʻokumu ʻana o ka hopena electroplating a me ka hoʻoponopono ʻana me nā lattice a i ʻole ka hopena passivation. Zinc mea chemically hana, oluolu e oxidise a pouli i loko o ka lewa, a hope hua 'keʻokeʻo rust' corrosion, zinc plating ma hope o chromate lapaʻau i mea e uhi i ka papa o ka zinc ma ka hoʻololi kemikala kiʻiʻoniʻoni, no laila, i ka hana metala i loko o ka passive mokuʻāina,ʻo ia ka passivation o zinc papa. Hiki ke hoʻokaʻawale ʻia ke kiʻi Passivation mai ka helehelena i ke keʻokeʻo passivation (keʻokeʻo zinc), māmā uliuli (blue zinc), ʻeleʻele passivation (black zinc), pūʻali koa ʻōmaʻomaʻo passivation (green zinc) a pēlā aku.

• Electrophoresis ʻeleʻele：

Ke hoʻohana nei i ke ʻano electrochemical e waiho ai i nā ʻāpana colloidal o ka resin organik ma nā ʻāpana e hana i ka papa uhi organik o nā waihoʻoluʻu like ʻole, hoʻohana hou ʻia ka electrophoresis ʻeleʻele i ka ʻoihana, e lawe i ka hana ʻeleʻele ma ke ʻano he laʻana: degreasing-cleaning-phosphating-electrophoresis paint-drying. Hiki ke hoʻokaʻawale ʻia i anodic electrophoresis (resin ionization i nā ion maikaʻi ʻole) a me ka cathodic electrophoresis (resin electrophoresis i loko o nā ion maikaʻi), a ʻo ke kaʻina pena i hoʻohālikelike ʻia i ka hana kūkulu ʻana he maikaʻi, pollution a me ka pōʻino i ke kaiapuni e hōʻemi i kona kūʻē ʻana i ka hana ʻana i ka paʻakai paʻakai i loko o 300 mau hola a ʻoi aku ka like.

• Zinc keʻokeʻo：

ʻO ke kaʻina hana electroplating: degreasing - hoʻomaʻemaʻe - hoʻonāwaliwali waika - electroplating zinc - hoʻomaʻemaʻe - lauoho passivation keʻokeʻo - hoʻomaʻemaʻe - hoʻomaloʻo, a ʻaʻohe ʻokoʻa zinc ʻeleʻele Ma luna o ka lat rack a me nā ʻokoʻa hoʻonā passivation, ʻo ka passivation keʻokeʻo he kiʻi ʻoniʻoni zinc oxide ʻeleʻele, ʻaneʻane ʻaʻohe chromium, no laila ke kūpaʻa ʻana o ka corrosion e pili ana i ka zinc ʻeleʻele, zinc-1, ʻoi aku ka maikaʻi o ka ʻoihana zinc-1 ma laila. ka hoʻomaikaʻi ʻana i ka pololei o ka ratio o ka hopena passivation hiki ke hana i ke kūʻē ʻana i ka paʻakai paʻakai kūʻokoʻa no kahi o 20 mau hola.

Ma muli o ke keʻokeʻo zinc plating type surface treatment screws e hana kuʻuna paʻakai paʻakai ho'āʻo 'ike mua ma luna o ka ili o ka plating corrosion keʻokeʻo, ulaula rust mea i loko o 40 hola, no laila keokeo zinc corrosion kū'ē i oi ma mua o keʻokeʻo nickel. ʻO ka hiʻohiʻona a me ka nickel keʻokeʻo i hoʻohālikelike ʻia me ka ʻeleʻele, ka zinc keʻokeʻo no ke kala kumu o ka zinc greenish-white, a me ka nickel keʻokeʻo i hoʻohālikelike ʻia i ka ʻokoʻa nui.

• Nikela Keʻokeʻo：

Plating kaʻina mea: degreasing - hoʻomaʻemaʻe - nāwaliwali waika ho'ā - hoʻomaʻemaʻe - keleawe lalo - ho'ā - hoʻomaʻemaʻe - electroplating nickel- Hoʻomaʻemaʻe - passivation - hoʻomaʻemaʻe - maloʻo - a i pani ʻia, a me ka ʻeleʻele nickel kaʻina hana he ʻano like ʻole, ʻokoʻa ka plating solution formula, emi ka zinc sulfide a hui pū. ʻAʻole nui ka ʻokoʻa o kona pale ʻana i ka corrosion a me ka nickel ʻeleʻele 6-12 hola, ʻo ke kaʻina hana o nā mea hana maʻamau e ʻoi aku 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 e like me ka nānā ʻana i ka mālama ʻana a i ʻole ma luna o ka aila.

• Zika polū, zinc ʻōmaʻomaʻo：

ʻO ke kaʻina hana like like me ka zinc keʻokeʻo, ʻo ka zinc polū ua passivated zinc oxide film i loaʻa ka 0.5-0.6mg/dm2 o trivalent chromium. ʻO ka passivation Green, i ʻike ʻia he passivation ʻelima-acid, hiki ke loaʻa i kahi kiʻiʻoniʻoni mauʻu-'ōmaʻomaʻo mānoanoa, ʻo ka hopena passivation i loko o nā ion phosphate, ʻo ka hopena glossy mauʻu-'ōmaʻomaʻo kiʻi he paʻakikī, structurally paʻakikī pale kiʻi o chromates a me phosphates.

No kona pale ʻana i ka corrosion, ʻoi aku ka maikaʻi o ka zinc uliuli ma mua o ka zinc keʻokeʻo, ʻoi aku ka maikaʻi o ka zinc ʻōmaʻomaʻo ma mua o ka zinc uliuli. ʻO ke kala o ka polū zinc he uliuli iki a me keʻokeʻo zinc pili kokoke i ka ʻoihana e hoʻohana hou aku, hiki ke hoʻohana ʻia ka hope e like me ka hoʻolālā huahana i ka wā o ke kaʻina hana ʻē aʻe o nā wili.

• zinc enamled (kemika)：

I loko o ka galvanizing waeʻano o ke kaʻina hana o ka kala zinc mea maikai corrosion kū'ē, kona kala passivation kaʻina mea: galvanizing - hoʻomaʻemaʻe - 2% - 3% nitric acid mai ka malamalama - hoʻomaʻemaʻe - haʻahaʻa chromium kala passivation - hoʻomaʻemaʻe -Baking elemakule. Haʻahaʻa loa ka wela o ka passivation, lohi ke kiʻiʻoniʻoni, ʻeleʻele ʻeleʻele lahilahi. ʻO ka wela kiʻekiʻe, mānoanoa a wehe ke kiʻiʻoniʻoni, ʻaʻole paʻa paʻa. ʻOi aku ka maikaʻi o ka mālama 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 kālua ʻia a ʻelemakule e hoʻomaikaʻi i ka hoʻopili ʻana a me ka pale ʻana i ka corrosion o ke kiʻiʻoniʻoni. ʻO nā wili zinc-plated kala ma ka hoʻopā ʻana i ka lalo o ke kūʻē ʻana i ka ʻūhā paʻakai kūʻokoʻa ma mua o 48 mau hola, hiki ke hana maikaʻi ʻia ma mua o 100 mau hola.

• ʻO Dacromet：

ʻO ia ka pōkole a me ka unuhi ʻana o DACROMET, ʻo ia hoʻi, ka paʻakai paʻakai chromium paʻakai paʻakikī paʻakikī, i kapa ʻia hoʻi ka uhi zinc-aluminum. ʻO ke kaʻina hana: degreasing - degreasing - uhi - preheating - sintering - cooling. ʻO ke kaʻina hana he 2-4 mau manawa mai ka uhi ʻana i ke kaʻina hoʻoluʻu, no ka mea, pono e hana hou ʻia nā wili me ka uhi ʻana e like me ka loaʻa ʻana o kekahi mānoanoa.

Aia ka hale ma luna o ka ʻili metala, uhi ʻia me kahi ʻāpana o ka solution Dacromet (ʻo ia hoʻi, aia nā unahi o ka zinc, aluminika [nā unahi maʻamau 0.1-0.2X10-15 microns] Cr03 a me nā mea kūlohelohe kūikawā o ka hoʻoheheʻe ʻia ʻana i hui pū ʻia), e 300 ° C a i ʻole ka mālama ʻana i ka wela i ka kuke ʻana i kekahi manawa, he Dacromet chromium i hoʻemi ʻia i ka wai. ka hopena i nā pūhui chromate composite amorphous (nCr03) mCr203).

ʻO ke kūpaʻa o ka corrosion he paʻakai kūpaʻa maikaʻi loa a hiki i 300 mau hola a ʻoi aku paha, ʻaʻole like ka hemahema o ka uhi ʻana, kahi kūlana lahilahi o 5-10um, kūlana mānoanoa o 40um a i ʻole, e hoʻopilikia i ka hohonu o ke anawaena wili, no laila ʻoi aku ka maikaʻi o ka mīkini paʻi ʻana i nā wili a me nā wili me kahi anawaena liʻiliʻi o nā wili.