Qhov zoo thiab qhov tsis zoo ntawm Trivalent Chromium Plating

Ua ntej tshaj, Trivalent yog dab tsi?

Nws yog ibhniav chrome plating, uas muaj peev xwm muab khawb thiab corrosion kuj nyob rau hauv ntau yam xim xaiv.Trivalent chromeyog suav tias yog eco-phooj ywg lwm txoj rau hexavalent chromium.

Tom ntej no, Cia peb saib cov txheej txheem no kom nkag siab txog nws cov txiaj ntsig thiab qhov tsis zoo.

Qhov zoo:

Qhov zoo ntawm covtrivalent chromium txheej txheemdhau ntawm cov txheej txheem hexavalent chromium yog qhov kev txhawj xeeb ntawm ib puag ncig tsawg dua vim qhov qis dua toxicity ntawm trivalent chromium, kev tsim khoom ntau dua, thiab cov nqi khiav lag luam qis dua.

Nyob rau hauv trivalent chromium txheej txheem, hexavalent chromium yog plating da dej paug.Yog li ntawd, lub da dej tsis muaj ib qho txiaj ntsig ntawm hexavalent chromium.Tag nrho chromium concentration ntawm trivalent chromium daws yog kwv yees li ib feem tsib ntawm hexavalent chromium daws.

Raws li qhov tshwm sim ntawm chemistry ntawm trivalent chromium electrolyte, misting tsis tshwm sim thaum plating li nws ua thaum lub sij hawm hexavalent chromium plating.Kev siv trivalent chromium kuj txo cov teeb meem pov tseg thiab cov nqi.

Qhov tsis zoo:

Qhov tsis zoo ntawm cov txheej txheem trivalent chromium yog tias cov txheej txheem muaj kev nkag siab ntau dua rau kev sib kis ntau dua li cov txheej txheem hexavalent chromium, thiab cov txheej txheem trivalent chromium tsis tuaj yeem phaj tag nrho cov phaj thicknesses uas cov txheej txheem hexavalent chromium tuaj yeem ua tau.Vim hais tias nws yog rhiab heev rau cov kab mob sib kis, cov txheej txheem trivalent chromium yuav tsum tau muab yaug kom huv si thiab kev tswj xyuas nruj dua li cov txheej txheem hexavalent chromium.Trivalent chromium da dej tuaj yeem phaj tuab li ntawm 0.13 txog 25 µm.Nws tsis tuaj yeem siv rau feem ntau nyuaj chromium plating daim ntaub ntawv.

Trivalent chromium electroplating da dej tau tsim feem ntau los hloov cov hniav zoo nkauj hexavalent chromium plating da dej.Txoj kev loj hlob ntawm trivalent da dej tau ua pov thawj tias nyuaj vim tias trivalent chromium solvates hauv dej los tsim cov ions ruaj khov uas tsis tuaj yeem tso tawm chromium.Tam sim no, muaj ob hom trivalent chromium txheej txheem ntawm kev ua lag luam: ib leeg-cell thiab ob-cell.Qhov sib txawv loj hauv ob txheej txheem yog tias cov txheej txheem ob lub xov tooj ntawm tes muaj cov tshuaj chloride tsawg tsawg, hos cov txheej txheem ib leeg ntawm tes muaj cov tshuaj chlorides siab.

Tsis tas li ntawd, cov txheej txheem ob-cell siv cov hlau lead anodes uas tau muab tso rau hauv cov thawv anode uas muaj cov tshuaj sulfuric acid diluted thiab yog cov kab nrog cov permeable membrane, hos cov txheej txheem ib leeg siv cov pa roj carbon lossis graphite anodes uas tau muab tso rau hauv kev sib cuag ncaj qha nrog. cov txheej txheem plating.Cov ntsiab lus ntawm cov txheej txheem no tsis muaj vim tias trivalent chromium da dej tam sim no ntawm kev ua lag luam yog tus tswv.

Nov yog cov txiaj ntsig tseem ceeb rau Trivalent chrome:

· Ib puag ncig phooj ywg-tsawg cov pa phem ntau dua li hexavalent plating

· Tsawg pov tseg sludge

· Txo cov nqi kho dej khib nyiab

· Tsawg cov cai xeem thiab cov nqi cuam tshuam

Cov drawbacks yog raws li nram no:

· Tus nqi siab dua me ntsis ntawm cov tshuaj & kev saib xyuas tsis zoo rau hexavalent plating.

· Nyuaj hauv kev xaiv anode

· Cov tshuaj complex muaj pes tsawg leeg

· Nyuaj hauv txheej thickness nce