Kau ʻia ma 2018-03-21ʻO ka hoʻohana ʻana i ka dacromet coating, ʻo ka hapa nui o nā ʻoihana ʻoihana maʻamau mesh belt furnace heaters e mālama i ka preheat zone temperature 80 ~ 120 ℃. ma ke kaʻina hana kemika o ka hōʻemi ʻana i ka chromium hexavalent e ka waiʻona.
ʻO ke ala no kēia hoʻoholo ʻana he hui ʻia o Dacromet B maʻemaʻe (aqueous chromic anhydride) a me ka polyethylene glycol reductant i ka like.Hoʻomoʻa ʻia ka uhi ʻana ma kahi kīʻaha aniani a hoʻomehana ʻia ma 120 ° C no 15 mau minuke.Ua hoʻoheheʻe ʻia ka wai a ʻo ke koena mea he kiʻi ʻoniʻoni ʻōmaʻomaʻo ʻeleʻele.
Inā wela ka ʻāpana hoʻāʻo i 120 mau minuke, lilo ke kala o ka uhi i ʻōmaʻomaʻo ʻōmaʻomaʻo, a paʻakikī ka uhi, akā hiki ke holoi ʻia me ka wai.ʻIke loa, ʻaʻole hiki ke hoʻohana i kahi wela lōʻihi ma 120 ° C e hana i kahi uhi o Dacromet.
Ka manawa hoʻouna: Jan-13-2022