Yakatumirwa pa 2018-12-22The Dacromet treatment solution is a dispersible aqueous solution inoumbwa ne zinc flakes, aluminium flakes, anhydrous chromic acid, ethylene glycol, zinc oxide, zvichingodaro, ine dhayamita ye4 kusvika mashanu micrometer uye ukobvu hwema micrometer mana kusvika mashanu.Mushure mekunge iyo yakabatwa workpiece yakanyudzwa kana kupfapfaidza mumvura yekurapa, pamusoro peiyo workpiece inonamirwa zvakapfava nemvura yekuputira, uye yobva yapiswa kusvika 300 ° C muchoto chekurapa kuti iite hexavalent chromium mumucheka wekuputira Iyo organic nyaya. zvakadai se ethylene glycol yakaderedzwa kuita mvura-insoluble, amorphous nCrO3 uye mCr2O3.Pasi pechiito chayo, zinc sheet uye aluminium sheet zvakabatanidzwa pamwe chete, uye gumi nemaviri akaturikidzana pamusoro peiyo workpiece.Iyo yekupfekedza, pamwe chete neiyo anhydrous chromic acid muDacromet coating, oxidize pamusoro peiyo workpiece kuti iwedzere kunamatira kwejasi pamusoro peiyo workpiece.
Iyo nzira yekudzivirira ngura yeDacromet coating inowanzoonekwa seinotevera:
1. Kudzora kuzvipira kuzvidzivirira kwe zinc powder;
2. Iyo chromic acid inoumba dense oxide firimu pamusoro pebasa rekushanda risingatani kusvibiswa panguva yekugadzirisa;
3. Kuvhara kunosanganisira makumi ezvikamu zvezinc uye aluminium mapepa anoumba basa rekudzivirira, iro rinowedzera kusvika kwevanopinda pamusoro pebasa rekushanda.
Nzira yakapfuura.Electro-galvanizing yakanyatsoputirwa nemucheka we zinc pamusoro pesimbi.Corrosion current iri nyore kuyerera pakati pezvikamu.Kunyanya munharaunda yekupfapfaidza munyu, ikozvino yekudzivirira yakaderedzwa zvakanyanya kuita kuti zinc ive nyore kushandisa.White ngura inogadzirwa padanho rekutanga rekugadzirisa.Kana tsvuku ngura.Iyo Dacromet kurapwa ine chidimbu chezinc sheet yakafukidzwa nechromic acid makomisheni, uye conductivity iri pakati nepakati, saka ine yakanakisa corrosion resistance.Mashizha ezinc akafukidzwa nemateru akaiswa pamusoro kuti aite nhovo, uye mwero wekunaya kwezinc unodzorwa kunyangwe muyedzo yekupfapfaidza munyu.Uyezve, sezvo chromic acid compound muDacromet yakaoma firimu isina mvura yekristaro, kupisa kwayo kwekushisa kwepamusoro uye kusagadzikana kwekuora mushure mekupisa zvakanaka zvakare.
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Nguva yekutumira: Jan-13-2022