Nov yog qhov sib txawv uas peb sau los ntawm Trivalent thiab hexavalent chromes.
Qhov txawv ntawm Trivalent thiab Hexavalent Chromium
Hexavalentchromium platingyog cov txheej txheem ntawm chromium plating (feem ntau hu ua chrome plating) thiab tuaj yeem siv rau kev kho kom zoo nkauj thiab ua haujlwm tiav.Hexavalent chromium plating yog ua tiav los ntawm submerging substrates rau hauv da dej ntawm chromium trioxide (CrO3) thiab sulfuric acid (SO4).Hom chromium plating no muab kev tiv thaiv corrosion thiab hnav, nrog rau kev zoo nkauj zoo nkauj.
Automotive steering log tivthaiv hauv hexavalent chrome tiav
Hexavalent chromiumplatingmuaj nws qhov tsis zoo, txawm li cas los xij.Hom plating no ua rau ntau cov khoom lag luam uas suav tias yog cov khib nyiab pov tseg, nrog rau cov hlau lead chromates thiab barium sulfate.Hexavalent chromium nws tus kheej yog ib yam khoom txaus ntshai thiab carcinogen thiab raug tswj hwm los ntawm EPA.Nyob rau hauv xyoo tas los no, automotive OEMs xws li Chrysler tau siv zog los hloov hexavalent chromium tiav nrog ntau eco-friendly tiav.
Trivalent chromiumyog lwm txoj kevhniav chrome plating, thiab suav hais tias yog ib puag ncig tus phooj ywg lwm txoj hauv kev rau hexavalent chromium, nrog ntau yam zoo ib yam;ib yam li hexavalent chrome tiav, trivalent chrome finishes muab khawb thiab corrosion kuj thiab muaj nyob rau hauv ntau yam xim xaiv.Trivalent chromium plating siv chromium sulfate los yog chromium chloride ua nws cov khoom tseem ceeb, es tsis txhob chromium trioxide;ua trivalent chromium tsawg toxic tshaj hexavalent chromium.
Sib dhos cov hniav nyiaj hniav kub hauv cov xim dub trivalent chrome hla cov npib tsib xee ci
Thaum cov txheej txheem trivalent chromium plating yog qhov nyuaj rau kev tswj, thiab cov tshuaj tsim nyog yuav kim dua li siv rau hexavalent chromium, qhov zoo ntawm txoj kev no ua rau nws tus nqi sib tw nrog lwm txoj kev ua tiav.Cov txheej txheem trivalent yuav tsum muaj lub zog tsawg dua li cov txheej txheem hexavalent thiab tuaj yeem tiv thaiv kev cuam tshuam tam sim no, ua rau nws muaj zog dua.Trivalent chromium qhov qis toxicity txhais tau hais tias nws raug tswj kom nruj me ntsis, txo cov pov tseg phom sij thiab lwm cov nqi ua raws.
Nrog rau cov kev cai ntawm cov khoom phom sij nruj nyob rau hauv Teb Chaws Asmeskas thiab EU, qhov xav tau rau ib puag ncig tus phooj ywg tiav zoo li trivalent chrome yog nce.
Hexavalent Chromium Plating Solution
Hard chromium plated deposits, uas feem ntau yog thicker plating, yog dav siv nyob rau hauv mining thiab aircraft industries thiab hydraulics thiab hlau sib sau cov cuab yeej.Lawv kuj tau siv hauv kev ua tiav ntawm cov khoom siv kho mob thiab phais.
Hexavalent chromium electrolytes xav tau ib qhov chaw ntawm chromium ions thiab ib los yog ntau tshaj catalysts thiaj li yuav phaj.Lub formulation ntawm cov txheej txheem ib txwm, hu ua cov pa da dej, muaj hexavalent chromium thiab sulfate ua tus catalyst nkaus xwb.
Proprietary additives uas yuav muab ntxiv rau cov pa hexavalent chromium plating da dej formulation los txhim kho cov txheej txheem yog hu ua mixed-catalyst da dej vim cov additives muaj tsawg kawg yog ib tug ntxiv catalyst ntxiv rau sulfate.
Trivalent Chromium Plating Solution
Cov electrolytes rau trivalent chromium plating daws txawv hauv chemistry, tab sis lawv txhua tus muaj ib qhov chaw ntawm trivalent chromium, uas feem ntau yog ntxiv sulfate los yog chloride ntsev.Lawv kuj muaj cov khoom siv solubilizing uas ua ke nrog cov chromium kom tso cai rau nws mus rau phaj hauv lub siab xav ua kom cov conductivity hauv cov tshuaj.
Cov neeg sawv cev ntub dej yog siv los pab hauv cov tshuaj tiv thaiv deposition thiab txo qhov nro ntawm cov tshuaj.Qhov txo qhov nro qhov tseem ceeb tshem tawm qhov tsim ntawm huab cua ntawm anode lossis cathode.Cov txheej txheem plating ua haujlwm zoo li Nickel da dej chemistry dua li Hex chrome da dej.Nws muaj lub qhov rais txheej txheem nqaim dua li hexavalent Chrome plating.Qhov ntawd txhais tau hais tias feem ntau ntawm cov txheej txheem yuav tsum tau tswj kom zoo, thiab ntau yam ntxiv.Qhov ua tau zoo ntawm Trivalent Chrome yog siab dua qhov ntawd rau Hex.Qhov tso nyiaj yog qhov zoo thiab tuaj yeem ua kom txaus nyiam heev.
Hexavalent chromium plating muaj nws qhov tsis zoo, txawm li cas los xij.Nws yog hu ua human carcinogen thiab tuaj yeem ua rau muaj teeb meem kev noj qab haus huv loj.Nco ntsoov dab tsi ua Erin Brockovich ua lub npe tsev neeg?Hom plating no ua rau ntau cov khoom lag luam uas suav tias muaj kev phom sij.
Trivalent chromium platingyog ib puag ncig zoo dua li hexavalent chromium;cov txheej txheem electrodeposition feem ntau tau txais ntau dua 500 lub sij hawm tsis muaj tshuaj lom ntau dua li hexavalent Chromium.Qhov txiaj ntsig tseem ceeb ntawm trivalent chromium txheej txheem yog tias nws muaj ntau yam.Plating faib yog ntau yam sib xws, chim plating yog ua tau rau trivalent chrome, uas yog tsis tau nrog hexavalent chrome.
Hexavalent Vs Trivalent Chromium
| Cov khoom | Hexavalent Chromium | Trivalent Chromium |
| Kev kho khib nyiab | kim | Yooj yim |
| Pov Hwj chim | pluag | Zoo |
| Kev nyab xeeb | Tsis ruaj ntseg heev | Muaj kev nyab xeeb;zoo ib yam li Nickel |
| Tolerance rau Contamination | Zoo Zoo | Tsis zoo li |
| NSS thiab CAS | Zoo sib xws | Zoo sib xws |
| Kev kub hnyiab | Tsis zoo | Zoo heev |
Lub rooj sib piv qee cov khoom ntawm Hexavalent thiab Trivalent Chromium
About CheeYuen
Tsim los ntawm Hong Kong xyoo 1969,CheeYuenyog ib lub chaw muab kev daws teeb meem rau kev tsim khoom yas thiab kho qhov chaw.Nruab nrog cov tshuab siab heev thiab cov kab ntau lawm (1 lub cuab yeej thiab kev txhaj tshuaj molding center, 2 electroplating kab, 2 painting kab, 2 PVD kab thiab lwm yam) thiab coj los ntawm ib tug cog lus pab neeg ntawm cov kws txawj thiab cov kws kho mob, CheeYuen Surface Treatment muab ib tug turnkey tov rauchromed, pleev xim&PVD qhov chaw, los ntawm cov cuab yeej tsim rau kev tsim khoom (DFM) mus rau PPAP thiab nws thiaj li ua tiav cov khoom xa tuaj thoob plaws ntiaj teb.
Certified los ntawmTIAB SA 16949, ISO9001thiabISO 14001thiab audited nrogVDA 6.3thiabCSR, CheeYuen Surface Treatment tau dhau los ua tus neeg xa khoom dav dav thiab cov tswv yim sib koom tes ntawm ntau lub npe nrov thiab cov chaw tsim khoom hauv tsheb, khoom siv, thiab da dej industries, suav nrog Continental, ALPS, ITW, Whirlpool, De'Longhi thiab Grohe, lwm.
Puas muaj cov lus hais txog cov ncej no lossis cov ncauj lus uas koj xav pom peb npog yav tom ntej?
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Post lub sij hawm: Nov-11-2023