Ka hoʻohui a me ka hana anti-rust o ka uhi Dacromet

Kau ʻia ma 2018-12-22ʻO ka hopena lapaʻau ʻo Dacromet he wai wai dispersible i haku ʻia me ka zinc flakes, aluminum flakes, anhydrous chromic acid, ethylene glycol, zinc oxide, etc., nona ke anawaena o ʻehā a ʻelima micrometers a me ka mānoanoa o ʻehā a ʻelima micrometers.Ma hope o ka hoʻoheheʻe ʻia ʻana o ka mea hana i mālama ʻia i loko o ka wai lapaʻau, ua hoʻopili ʻia ka ʻili o ka mea hana me kahi wai uhi, a laila wela a hiki i 300 ° C i loko o ka umu hoʻōla e hana i ka chromium hexavalent i loko o ka papa uhi. e like me ka ethylene glycol ua ho'ēmiʻia e hana i ka wai-ʻole, amorphous nCrO3 a me mCr2O3.Ma lalo o kāna hana, ua hoʻopaʻa ʻia ka ʻāpana zinc a me ka pepa alumini, a ua hoʻopaʻa ʻia nā papa he nui ma ka ʻili o ka mea hana.ʻO ka uhi, me ka anhydrous chromic acid i loko o ka uhi ʻana o Dacromet, e hoʻoneʻe i ka ʻili o ka mea hana e hoʻonui ai i ka pili ʻana o ka uhi i ka ʻili o ka mea hana.
ʻO ka ʻōnaehana pale ʻana o ka uhi ʻana o Dacromet i manaʻo pinepine ʻia e like me kēia:
1. Mālama ʻia ka hoʻolaʻa ʻana iā ia iho i ka pauka zinc;
2. Hoʻokumu ka chromic acid i kahi kiʻiʻoniʻoni oxide ma luna o ka ʻili o ka mea hana i hiki ʻole ke ʻino i ka wā e hana ai;
3. ʻO ka uhi ʻana he ʻumi mau ʻāpana o ka zinc a me nā ʻāpana alumini e hana i kahi hana pale, e hoʻonui ai i ka hōʻea ʻana o ka mea komo ma ka ʻili o ka mea hana.
ʻO ke ala i hala.Hoʻopili pololei ʻia ka electro-galvanizing me kahi papa zinc ma ka ʻili o ke kila.He maʻalahi ke kahe ʻana o ka ʻino ma waena o nā papa.ʻOi aku ka nui o ka paʻakai paʻakai, hoʻemi nui ʻia ke ʻano pale i mea e maʻalahi ai ka ʻai ʻana i ka zinc.Hana ʻia ka ʻōpala keʻokeʻo i ka wā mua o ka hana.A i ʻole ʻula ʻula.ʻO ka lāʻau Dacromet kahi ʻāpana zinc i uhi ʻia me nā pūhui chromic acid, a maʻalahi ka conductivity, no laila he kūpaʻa maikaʻi loa.Hoʻopili ʻia nā ʻāpana zinc i uhi ʻia e nā papa e hana i pale, a mālama ʻia ka nui o ka ua o ka zinc ma ka hoʻāʻo ʻana i ka paʻakai.Eia kekahi, no ka mea, ʻaʻole i loaʻa i ka wai aniani ka chromic acid i loko o ke kiʻi maloʻo Dacromet, ʻoi aku ka maikaʻi o kona kūpaʻa wela kiʻekiʻe a me ke kūpaʻa corrosion ma hope o ka hoʻomehana ʻana.