Tshaj tawm rau 2018-12-22Cov tshuaj Dacromet kho yog cov tshuaj dispersible aqueous uas muaj zinc flakes, aluminium flakes, anhydrous chromic acid, ethylene glycol, zinc oxide, thiab lwm yam., muaj ib txoj kab uas hla ntawm plaub mus rau tsib micrometers thiab thickness ntawm plaub mus rau tsib micrometers.Tom qab cov khoom kho tau muab tso rau hauv dej los yog txau rau hauv cov kua kho mob, qhov chaw ntawm lub workpiece yog thinly adhered nrog cov kua txheej, thiab ces rhuab mus txog 300 ° C nyob rau hauv lub curing rauv kom lub hexavalent chromium nyob rau hauv lub txheej txheej cov organic teeb meem. xws li ethylene glycol raug txo kom tsim dej-insoluble, amorphous nCrO3 thiab mCr2O3.Raws li nws qhov kev nqis tes ua, cov ntawv zinc thiab cov ntawv txhuas yog sib txuas ua ke, thiab ntau txheej txheej tau muab tso rau ntawm qhov chaw ua haujlwm.Cov txheej, ua ke nrog cov anhydrous chromic acid nyob rau hauv Dacromet txheej, oxidizes nto ntawm lub workpiece los txhim kho cov adhesion ntawm txheej rau saum npoo ntawm lub workpiece.
Cov txheej txheem tiv thaiv xeb ntawm Dacromet txheej feem ntau suav tias yog cov hauv qab no:
1. Tswj kev tiv thaiv tus kheej ntawm zinc hmoov;
2. Cov chromic acid tsim cov yeeb yaj kiab oxide ntom ntom ntawm cov khoom ua haujlwm uas tsis yooj yim corroded thaum ua;
3. Cov txheej txheej uas muaj kaum tawm txheej ntawm zinc thiab txhuas ntawv ua ib qho kev tiv thaiv kev ua haujlwm, uas ua rau cov neeg tuaj yeem tuaj txog ntawm qhov chaw ua haujlwm.
Txoj kev uas tau dhau mus lawm.Electro-galvanizing yog ncaj qha coated nrog ib txheej ntawm zinc rau saum npoo ntawm hlau.Corrosion tam sim no yooj yim ntws nruab nrab ntawm cov khaubncaws sab nraud povtseg.Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig ntsev tsuag, qhov kev tiv thaiv tam sim no tau txo qis kom zinc yooj yim rau noj.Dawb xeb yog tsim nyob rau hauv thaum ntxov theem ntawm kev ua.Los yog xeb liab.Kev kho Dacromet muaj ib daim ntawv zinc npog nrog chromic acid tebchaw, thiab cov conductivity yog nruab nrab, yog li nws muaj zoo heev corrosion kuj.Cov nplooj ntawv zinc npog los ntawm cov khaubncaws sab nraud povtseg yog superimposed los ua ib daim ntaub thaiv npog, thiab cov nag lossis daus ntawm zinc yog tswj tau txawm tias nyob rau hauv cov tshuaj tsuag ntsev.Ntxiv mus, txij li cov chromic acid compound nyob rau hauv Dacromet qhuav zaj duab xis tsis muaj cov dej siv lead ua, nws kub tsis kam thiab corrosion kuj tom qab cua sov kuj zoo.
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Post lub sij hawm: Jan-13-2022