Hexavalent chromium (Cr(VI)) thiab trivalent chromium (Cr(III)) tuav txoj haujlwm tseem ceeb hauv kev lag luam. Hexavalent chromium yog siv dav hauv kev kho mob hlau vim nws cov nyhuv passivation zoo heev thiab tus nqi qis. Txawm li cas los xij, kev siv hexavalent chromium tau maj mam txwv lossis txwv los ntawm ntau lub tebchaws vim nws cov tshuaj lom neeg siab thiab teeb meem ib puag ncig. Ntawm qhov tsis sib xws, trivalent chromium tau maj mam hloov mus rau hexavalent chromium vim nws qhov kev tiv thaiv ib puag ncig thiab kev noj qab haus huv thiab kev nyab xeeb zoo. Kab lus no yuav tham txog qhov zoo, qhov tsis zoo, cov xwm txheej tam sim no thiab kev txhim kho yav tom ntej ntawm hexavalent chromium thiab trivalent chromium, nrog rau kev saib xyuas tshwj xeeb rau kev hloov pauv hauv kev lag luam tsheb, thiab tshuaj xyuas lub luag haujlwm ntawm auxiliary anodes hauv qhov kev hloov no.
Cov xwm txheej tam sim no ntawm hexavalent chromium
Qhov zoo
- **Zoo passivation nyhuv**: Hexavalent chromium passivation zaj duab xis muaj siab corrosion kuj thiab nws tus kheej-kho muaj peev xwm, thiab muaj peev xwm tiv thaiv zoo hlau nto.
- ** Tus nqi qis **: Tus nqi ntawm hexavalent chromium passivation tov yog qhov tsawg, thiab cov txheej txheem yog mature, ua rau nws haum rau loj-scale ntau lawm.
- ** Diversity **: Passivation films ntawm ntau yam xim tuaj yeem tsim, xws li nyiaj-dawb, xiav-dawb, ntau xim, tub rog ntsuab thiab dub, thiab lwm yam, kom ua tau raws li qhov xav tau sib txawv.
Ua tsis tau
- **High Toxicity**: Hexavalent chromium yog tshuaj lom heev, tsim kev puas tsuaj rau tib neeg lub cev thiab ib puag ncig, thiab yuav ua rau muaj teeb meem loj xws li mob qog noj ntshav.
- **Environmental Pollution**: Hexavalent chromium ua phem rau ib puag ncig thiab nyuaj rau kev daws teeb meem. Nws siv tau raug txwv lossis txwv los ntawm ntau lub tebchaws thiab cheeb tsam.
Qhov nce ntawm trivalent chromium
qhov zoo
- ** Kev tiv thaiv ib puag ncig **: Cov tshuaj lom ntawm trivalent chromium tsuas yog 1% ntawm hexavalent chromium, uas tsis tshua muaj kev phom sij rau tib neeg lub cev thiab ib puag ncig thiab muaj ntau dua raws li kev tiv thaiv ib puag ncig.
- ** Ua kom sov zoo **: Cov yeeb yaj kiab trivalent chromium passivation muaj cov cua sov zoo thiab cov kua passivation muaj lub neej ua haujlwm ntev.
- ** Cov xim ci **: Cov yeeb yaj kiab trivalent chromium passivation muaj xim ci thiab zoo ib yam, haum rau cov ntim loj thiab cov khoom siv ua haujlwm.
ua tsis tau
- ** Tsis muaj zog corrosion kuj **: Cov kev tiv thaiv corrosion ntawm trivalent chromium passivation zaj duab xis tsis zoo li ntawm hexavalent chromium, thiab nws tsis muaj peev xwm kho tus kheej, xav tau kev kho sealing ntxiv los txhim kho nws cov corrosion kuj.
- ** Tus nqi siab dua **: Vim yog cov txheej txheem nyuaj, tus nqi ntawm trivalent chromium passivation tus neeg sawv cev yog qhov siab thiab yuav tsum tau tshawb fawb thiab tu.
Kev hloov pauv hauv kev lag luam automotive
Kev lag luam tsheb yog ib qhov chaw tseem ceeb uas siv hexavalent chromium thiab trivalent chromium. Raws li cov kev cai ib puag ncig tau nce ntxiv, tshwj xeeb tshaj yog nyob rau hauv European thiab Asmeskas kev lag luam, cov tuam txhab tsheb tau nquag nrhiav lwm txoj hauv kev rau hexavalent chromium. Nov yog qee qhov kev hloov pauv tseem ceeb:
01
Kev cai tsav
Cov kev cai ib puag ncig nyob rau hauv cov chaw xws li European Union thiab Tebchaws Meskas tau txwv nruj heev rau kev siv hexavalent chromium, ua rau cov neeg tsim tsheb tig mus rau trivalent chromium lossis lwm yam kev kho mob ib puag ncig.
02
Technology Innovation
Kev lag luam tsheb cov khoom lag luam tau nqis peev hauv kev tsim kho tshiab trivalent chromium thev naus laus zis kom ua tau raws li kev tiv thaiv corrosion siab thiab kev xav zoo nkauj ntawm cov khoom siv tsheb. Piv txwv li, kev txhim kho hauv cov txheej txheem electroplating tau txhim kho qhov corrosion kuj ntawm trivalent chromium.
03
Kev txiav txim siab nqi
Txawm hais tias tus nqi pib ntawm trivalent chromium kuj yog siab heev, nws cov nqi yuav tsum maj mam txo qis thaum cov thev naus laus zis loj tuaj thiab raug tsim los ntawm qhov loj. Tib lub sijhawm, kev siv trivalent chromium tuaj yeem txo cov nqi kho ib puag ncig, yog li txo tus nqi tag nrho.
04
Kev sib tw ua lag luam
Vim muaj kev tiv thaiv ib puag ncig thiab kev paub txog cov neeg siv khoom, cov tuam txhab tsheb siv trivalent chromium thev naus laus zis muaj qee yam zoo hauv kev sib tw ua lag luam.
Lub luag haujlwm ntawm auxiliary anodes hauv kev hloov pauv
Nrog rau cov kev cai ib puag ncig nruj zuj zus ntxiv thiab kev txhim kho txuas ntxiv ntawm trivalent chromium thev naus laus zis, titanium anode rods li auxiliary anodes rau hexavalent chromium plating yuav maj mam thim tawm ntawm kev ua lag luam. Qhov no feem ntau yog los ntawm cov laj thawj hauv qab no:
- ** Theem-tawm qauv ntawm hexavalent chromium **: Kev siv hexavalent chromium maj mam txwv thiab phased tawm thoob ntiaj teb. Raws li cov txheej txheem hexavalent chromium plating txo qis, qhov kev thov rau titanium anode rods kuj yuav txo qis raws li.
- ** Kev nce qib hauv Trivalent Chromium Technology**: Trivalent chromium electroplating technology tuaj yeem hloov hexavalent chromium hauv ntau daim ntawv thov thiab feem ntau tsis tas yuav siv cov titanium anode rods.
- ** Ntau qhov kev tiv thaiv ib puag ncig **: Kev siv hexavalent chromium thiab cov khoom siv cuam tshuam ntsib kev saib xyuas nruj dua thiab cov nqi tiv thaiv ib puag ncig ntau dua.
- ** Txhim kho cov thev naus laus zis kho tshiab saum npoo **: Qee cov thev naus laus zis uas tsis muaj chromium-dawb nyob rau hauv kev tshawb fawb thiab tuaj yeem txo qhov xav tau ntawm cov khoom siv hexavalent chromium plating.
Xaus thiab Outlook
Txawm hais tias trivalent chromium yog maj mam hloov hexavalent chromium nyob rau hauv ntau daim ntawv thov, nws tseem yog ib qho nyuaj rau tag nrho cov hexavalent chromium los ntawm trivalent chromium nyob rau hauv tej qhov chaw uas yuav tsum tau heev corrosion kuj thiab cov xim tshwj xeeb. Raws li thev naus laus zis txuas ntxiv mus, kev ua tau zoo ntawm trivalent chromium thiab lwm yam kev xaiv tsis muaj chromium yog kev txhim kho, maj mam txo qhov sib txawv nrog hexavalent chromium. Nyob rau hauv lub neej yav tom ntej, feem ntau ntawm daim ntawv thov tej zaum yuav kawg theem ntawm hexavalent chromium tag nrho, tab sis nyob rau hauv tej qhov chaw tshwj xeeb, cov txheej txheem yuav qeeb dua. Tshwj xeeb tshaj yog nyob rau hauv kev lag luam automotive, daim ntawv thov ntawm trivalent chromium yuav maj mam nce, thiab lub luag hauj lwm ntawm auxiliary anodes yuav raug kho kom haum raws li cov kev xav tau tshiab.
Vam tias cov lus qhia ua kom zoo tshaj plaws thiab cov ntsiab lus tsim nyog yuav pab koj txhim kho koj cov ntaub ntawv. Yog tias muaj lwm yam kev xav tau lossis kev hloov kho thov koj xav qhia rau kuv paub.
hais txog cov khoom hauv ehisen
