1.Vim li cas nws thiaj suav tias yog "ib puag ncig tus phooj ywg"?
Tshem tawm cov tshuaj lom lom ntau ntawm qhov chaw:
Traditional Chromate Passivation: Siv cov kev daws teeb meem uas muaj hexavalent chromium (Cr6+). Hexavalent chromium yog thoob ntiaj teb lees paub tias yog lub zog carcinogen, mutagen, thiab muaj zog oxidant, ua rau muaj kev hem thawj rau ib puag ncig thiab tib neeg kev noj qab haus huv.
Chromium-Free Passivation: Tsis muaj hexavalent thiab trivalent chromium (qee cov txheej txheem uas muaj trivalent chromium kuj hu ua "chromium-dawb," tab sis cov lus tseeb dua yog "hexavalent chromium-dawb"). Qhov no tshem tawm qhov kev pheej hmoo ntawm chromium pollution ntawm qhov chaw.
Txheej txheem ntau lawm Safer:
Cov neeg ua haujlwm tsis tas yuav tsum raug rau cov pa phem chromic acid thiab chromium - muaj cov kev daws teeb meem, ua rau muaj kev nyab xeeb ntawm kev ua haujlwm.
Cov dej khib nyiab thiab cov khib nyiab pov tseg tsis muaj hexavalent chromium, txo cov kev kho mob nyuaj thiab kev pheej hmoo ntawm ib puag ncig tom qab.
Kev nyab xeeb rau cov khoom thiab cov neeg siv kawg:
Passivated txias-rolled coils (piv txwv li, siv hauv cov kaus poom zaub mov, cov khoom siv hauv tsev, thiab cov khoom siv tsheb) tsis ua rau muaj kev pheej hmoo ntawm hexavalent chromium tsiv teb tsaws, ua raws li kev nruj nruj thoob ntiaj teb cov cai xws li RoHS, REACH, thiab ELV, nrog rau cov khoom noj khoom haus sib cuag cov qauv.
2.Yuav ua li cas peb yuav tsum ua tib zoo xav txog "kev tiv thaiv ib puag ncig"?
Environmental friendliness ntawm chemical Cheebtsam:
Mainstream chromium-cov thev naus laus zis:
Organic systems: xws li silanes, phosphate esters, acrylic resins, thiab lwm yam. Lawv cov monomers los yog additives tej zaum yuav muaj cov organic teeb meem, yuav tsum tau xyuam xim rau lawv biodegradability thiab toxicity.
Inorganic systems: xws li zirconium/titanium ntsev, molybdates, tsawg lub ntiaj teb ntsev, phosphates, thiab lwm yam. Cov hlau ntsev no inherently deb tsawg toxic tshaj hexavalent chromium, tab sis lawv emission concentrations thiab ntev - lub sij hawm ecological cuam tshuam tseem yuav tsum tau saib xyuas (xws li, ib co hlau tseem ecotoxic thaum nyob rau hauv ntau).
Cov ntsiab lus tseem ceeb: Nws tsis tuaj yeem hais tias tag nrho cov chromium - cov tshuaj dawb yog "tsis muaj- tshuaj lom," tab sis lawv qhov kev pheej hmoo ib puag ncig thiab kev phom sij yog ntau qhov kev txiav txim siab qis dua hexavalent chromium.
Lub zog thiab kev siv peev txheej ntawm cov txheej txheem:
Qee cov chromium- cov txheej txheem pub dawb yuav xav tau kev kho kom zoo dua qub (zoo cuam tshuam nrog kev sib tham yav dhau los tu), qhov kub thiab txias thiab pH tswj, lossis lub sijhawm ua haujlwm ntev dua, uas tuaj yeem ua rau tsis muaj dej, hluav taws xob, thiab kev siv cua sov.
Cov yeeb yaj kiab- ua kom muaj txiaj ntsig ntawm qee cov txheej txheem yuav qis dua li cov chromates, yuav tsum tau ua kom zoo kom txo tau cov tshuaj lom neeg.
3.Dab tsi yog cov khoom tseem ceeb thiab qhov zoo ntawm organosilanes/alkoxy pawg?
Cov khoom tseem ceeb: Silane coupling tus neeg sawv cev
Ib puag ncig zoo: Tsis muaj hlau hnyav, cov ntsiab lus tsis tshua muaj organic, tswj tau VOCs
Tej zaum ib puag ncig xav txog: Lub biodegradability ntawm organosiloxanes xav tau kev saib xyuas; ib co formulations muaj cawv solvents
4.Dab tsi yog cov khoom tseem ceeb thiab qhov zoo ntawm zirconium/titanium-raws li cov ntaub ntawv?
Cov khoom tseem ceeb: Fluorozyric acid, fluorotitanic acid
Ib puag ncig zoo: Tsis muaj cov organic teeb meem, tsim ib zaj duab xis nyias, thiab yuav tsum tau siv me me
Muaj peev xwm xav txog ib puag ncig: Cov dej khib nyiab muaj fluoride ions (F⁻), yuav tsum tau kho defluorination; muaj zirconium / titanium hlau ions
5.Yuav ua li cas rau yav tom ntej ntawm chromium-pab passivation technology?
Qhov tseem ceeb ntawm ib puag ncig tus phooj ywg: Chromium-dawb passivation yog lub hauv paus kev taw qhia rau kev hloov pauv ntawm txias- dov coil nto kho rau kev tsim ntsuab. Nws pab daws cov haujlwm kev noj qab haus huv, kev nyab xeeb ntawm cov khoom lag luam, thiab kev pheej hmoo ib puag ncig cuam tshuam nrog hexavalent chromium, ua raws li cov qauv kev txhim kho thoob ntiaj teb.
Kev tiv thaiv ib puag ncig yog ib txoj haujlwm engineering: nws txoj kev phooj ywg ib puag ncig tsis yog nyob ntawm cov tshuaj lawv tus kheej nkaus xwb tab sis kuj nyob rau ntawm cov saw hlau ua tiav ntawm "kev kho kom zoo tshaj plaws (ntxuav) → kev tswj cov txheej txheem meej → ua tau zoo kawg - ntawm - yeeb nkab kev kho dej khib nyiab." Ib qho kev tswj tsis tau zoo chromium- cov kab ntau lawm yuav tseem tsis txaus "ntsuab" vim muaj peev txheej pov tseg lossis muaj kuab paug thib ob.
Kev ntsuas kev ua tau zoo thiab kev tiv thaiv ib puag ncig: Kev lag luam tseem tab tom txhim kho txuas ntxiv tom ntej -tiam chromium- thev naus laus zis, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau tiv thaiv corrosion, adhesion, thiab lwm yam khoom, thaum txo cov tshuaj toxicity, kev siv zog, thiab dej haus.