Mapangidwe ndi anti- dzimbiri makina a Dacromet zokutira

Adalemba pa 2018-12-22The Dacromet treatment solution ndi dispersible amadzimadzi yankho lopangidwa ndi zinc flakes, aluminium flakes, anhydrous chromic acid, ethylene glycol, zinc oxide, etc., yokhala ndi mainchesi anayi kapena asanu ndi makulidwe a ma micrometer anayi kapena asanu.Pambuyo pomizidwa kapena kupopera mankhwala mumadzi opangira mankhwala, pamwamba pa workpiece imamatira pang'onopang'ono ndi madzi okutira, kenako imatenthedwa mpaka pafupifupi 300 ° C mu ng'anjo yochizira kuti apange chromium ya hexavalent mu nsanjika yokutira. monga ethylene glycol amachepetsedwa kuti apange madzi osasungunuka, amorphous nCrO3 ndi mCr2O3.Pansi pakuchita kwake, pepala la zinki ndi pepala la aluminiyamu zimalumikizidwa palimodzi, ndipo zigawo zambiri zimayikidwa pamwamba pa chogwirira ntchito.Chophimbacho, pamodzi ndi anhydrous chromic acid mu zokutira Dacromet, oxidize pamwamba pa workpiece kumapangitsanso kumamatira kwa zokutira pamwamba pa workpiece.
Njira yopewera dzimbiri ya zokutira za Dacromet nthawi zambiri imadziwika kuti ndi iyi:
1. Kutetezedwa kodzitetezera kwa ufa wa zinki;
2. Chromic asidi imapanga wandiweyani okusayidi filimu pamwamba pa workpiece kuti mosavuta dzimbiri pa processing;
3. Chophimba chokhala ndi zigawo khumi za zinc ndi aluminiyamu mapepala amapanga ntchito yotetezera, yomwe imawonjezera kufika kwa wolowa pamwamba pa workpiece.
Njira yomwe yapita.Electro-galvanizing imakutidwa mwachindunji ndi wosanjikiza wa zinc pamwamba pa chitsulo.Kuwonongeka kwamakono ndikosavuta kuyenda pakati pa zigawo.Makamaka m'malo opopera mchere, mphamvu zoteteza zimachepetsedwa kwambiri kuti zinc ikhale yosavuta kudya.White dzimbiri amapangidwa kumayambiriro siteji processing.Kapena dzimbiri lofiira.Chithandizo cha Dacromet chimakhala ndi pepala la zinki lophimbidwa ndi mankhwala a chromic acid, ndipo madutsidwe ake ndi ochepa, chifukwa chake amakhala ndi kukana kwa dzimbiri.Mapepala a zinc omwe amakutidwa ndi zigawozo amapangidwa pamwamba kuti apange chishango, ndipo mphepo yamkuntho ya zinc imayendetsedwa ngakhale poyesa mchere.Komanso, popeza chromic acid pawiri mu filimu yowuma ya Dacromet ilibe madzi a kristalo, kukana kwake kutentha kwapamwamba komanso kukana kwa dzimbiri pambuyo pa kutentha kulinso kwabwino.