ʻO ke ʻano hoʻomohala o ka pena dacromet manuahi chrome

Kau ʻia ma 2016-12-22Ua ʻike ʻia ʻo Dacromet kahi hopena wai dispersible me ka zinc flake, alumini flake a me nā mea hoʻohui.ʻO nā mea hana ma hope o ke kuʻi ʻana a me ka pipi ʻana, mālama ʻia 20min ma 80 ℃ i ka umu hoʻomehana mua, 30min ma 300 ℃ i ka umu hoʻōla.Hana ʻia ka chromium hexavalent he waiʻona adipic a ʻaʻole hoʻoheheʻe ʻia ka hoʻohaʻahaʻa organik i loko o ka wai o ka uhi dacromet i ka wai.
Pono e hoʻomaopopo ʻia ʻo ka hoʻemi ʻana o ka hexavalent chromium i loko o ka trivalent chromium a me ka trivalent chromium oxidation i ka hexavalent chromium he hana hoʻohuli.No laila, i loko o ka workpiece sintered, trivalent chromium e hoʻomau i ka oxidized i hexavalent chromium, a hexavalent chromium mea he carcinogen, no laila pili e lawe mai i ka pōʻino i ke olakino.No laila, ʻaʻole loaʻa loa ka hoʻokuʻu ʻana o ka chromium-containing coating solution, ʻoiai ka lōʻihi o ka noho ʻana o ka hexavalent chromium, e loaʻa kahi hopena i ke kaiapuni a me nā kānaka, no laila, pono ka kaulana o chrome free Dacromet.
Ke hoʻomau nei ka hoʻoikaika ʻana o ka hoʻoikaika ʻana i ke kaiapuni, ʻoi aku ka nui o nā mea hana ʻāpana kaʻa e koi i nā ʻāpana chrome free dacromet coated.A hiki i ka hoʻomohala ʻana i nā kūlana ʻenehana chrome free dacromet coating.E like me Volkswagen GMW3359, GM7111M etc.
Ke ʻimi nei ʻo Chrome free Dacromet i nā mea ʻē aʻe ma kahi o ka chromic acid passivation a me ka hoʻopaʻa ʻana.Hoʻohana nui ʻia ʻo Chrome free Dacromet coating i ke kinona silika, inorganic silicon, molybdate, tungstate, phosphate as binder, ka hoʻohana like ʻana i ka scaly zinc / alumini flake e like me ka mea hoʻopihapiha nui, a ma o ke ʻano o ka sila Post-treatment, e hoʻokō i ka maikaʻi like. pale ʻino me ka chromium-i loko o ka Dacromet uhi.
Chrome noa Dacromet enehana mea ole wale i ka pono o ka chromium-dacromet enehana, akā, no hoi mai pena hoʻomākaukau, ka uhi, film, ka uhi iho ua loa noa o hexavalent chromium, i ka 'oiaʻiʻo manaʻo o ka hoʻokō 'ana i ka uliuli non-mea ino harmless.Mai ke kaiapuni manaʻo, i loko o ke ao holoʻokoʻa o chrome noa Dacromet ma kahi o chrome dacromet kuhikuhipuʻuone e ole e loli, e lawe mai i ka hou puni o anti-corrosion 'enehana kahua o ke kaiapuni kipi.