Iposwe kwi 2018-12-22Isisombululo sonyango lwe-Dacromet sisisombululo esinamanzi esichithwayo esinezinki ze-zinc, i-aluminium flakes, i-anhydrous chromic acid, i-ethylene glycol, i-zinc oxide, njl., enobubanzi be-micrometers ezine ukuya ezintlanu kunye nobukhulu bee-micrometers ezine ukuya ezintlanu.Emva kokuba i-workpiece ephathwayo intywiliselwe okanye itshizwe kulwelo lonyango, umphezulu we-workpiece unyathelwe kancinci ngolwelo lokugquma, emva koko ufudunyezwe ukuya kuthi ga kwi-300 ° C kwiziko lokunyanga ukwenza i-chromium enehexavalent kumaleko wokugquma. njenge-ethylene glycol iyancitshiswa ukuba yenze i-water-insoluble, i-amorphous nCrO3 kunye ne-mCr2O3.Ngaphantsi kwesenzo salo, ishidi le-zinc kunye nephepha le-aluminium lidityaniswe kunye, kwaye ininzi yemigangatho ifakwe kumphezulu we-workpiece.I-coating, kunye ne-anhydrous chromic acid kwi-coating ye-Dacromet, i-oxidizes umphezulu we-workpiece ukunyusa ukunamathela kwengubo kumphezulu we-workpiece.
Indlela yokuthintela umhlwa yokugquma kweDacromet ithathwa ngokuba yile ilandelayo:
1. Ukulawulwa kokuzincama ukhuseleko lwe-zinc powder;
2. I-asidi ye-chromic yenza ifilimu edibeneyo ye-oxide ebusweni bomsebenzi ongekho lula ukutshatyalaliswa ngexesha lokucubungula;
3. Ukugquma okubandakanya amashumi eengqimba ze-zinc kunye ne-aluminium sheets zenza umsebenzi wokukhusela, okwandisa ukufika kwe-intruder phezu kwendawo yokusebenza.
Indlela egqithileyo.I-Electro-galvanizing ifakwe ngokuthe ngqo ngoluhlu lwezinc phezu kwentsimbi.I-Corrosion current ilula ukuhamba phakathi kweeleya.Ngokukodwa kwindawo yokutshiza ityuwa, umsinga wokukhusela uncitshiswe kakhulu ukwenza i-zinc ibe lula ukuyisebenzisa.Umhlwa omhlophe uveliswa kwinqanaba lokuqala lokulungiswa.Okanye umhlwa obomvu.Unyango lwe-Dacromet luqukethe isiqwenga se-zinc sheet ehlanganiswe ne-chromic acid compounds, kwaye i-conductivity iphakathi, ngoko inokumelana nokugqwala okukhulu.Amaphepha e-zinc agqunywe ngamaleko abekwe phezulu ukuze enze ikhuselo, kwaye isantya semvula ye-zinc silawulwa nakwi-test spray yetyuwa.Ngaphezu koko, ekubeni i-chromic acid compound kwifilimu eyomileyo ye-Dacromet ayinayo amanzi e-crystal, ukumelana nokushisa kwayo okuphezulu kunye nokumelana nokubola emva kokufudumeza kukwalungile.
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Ixesha lokuposa: Jan-13-2022