Kuwongolera kutentha kwa dacromet

Adalemba pa 2018-03-21Kugwiritsa ntchito ❖ kuyanika kwa dacromet, makampani ambiri opangira ma mesh lamba ng'anjo yamoto amawongolera kutentha kwa preheat zone 80 ~ 120 ℃.Cholinga chachikulu cha kutentha uku ndikusungunula chinyontho mu zokutira popanda kuwira, nthawi yomweyo, ndikutsatiridwa. ndi njira yamankhwala yochepetsera hexavalent chromium ndi mowa.

Njira yotsimikizira izi ndi kusakaniza kwa Dacromet B (amadzimadzi chromic anhydride) ndi polyethylene glycol reductant molingana.Chophimbacho chinaphikidwa pa galasi la galasi ndikutenthetsa pa 120 ° C kwa mphindi 15.Madziwo adasanduka nthunzi ndipo chotsaliracho chinali filimu yonyowa yobiriwira yobiriwira.

Ngati chidutswa choyesera chikutenthedwa mpaka mphindi 120, mtundu wa zokutira umakhala wobiriwira wobiriwira, ndipo chophimbacho chimakhala cholimba, koma chikhoza kutsukidwa ndi madzi.Mwachiwonekere, sizingatheke kugwiritsa ntchito kutentha kwa nthawi yaitali pa 120 ° C kuti mugwiritse ntchito chophimba cha Dacromet.