Dab tsi yog qhov yuav tsum tau ua kom zoo rau cov yeeb yaj kiab passivation?
Uniform xim (xws li, iridescent rau ntau xim passivation, ci dawb rau xiav -dawb passivation).
Tsis muaj pob dawb los yog tev tawm, muaj zog adhesion, thiab lub sij hawm teev corrosion kuj nyob rau hauv cov tshuaj tsuag ntsev yuav tsum tau ntsib.
Yuav ua li cas peb thiaj li ua tau zoo ib yam txheej thaum lub sij hawm ntau lawm?
Tswj cov txheej txheem tsis tu ncua (kub, tam sim no, sijhawm) thiab ntsuas cov cuab yeej tsis tu ncua.
Ntsuam xyuas thickness, adhesion, thiab corrosion kuj los ntawm sampling txhua batch thiab sau cov ntaub ntawv.
Tsis tu ncua tuav lub plating tank, anodes, thiab racks los tiv thaiv cov khoom laus los ntawm kev cuam tshuam zoo.
Yuav ua li cas cov txheej txheem ntau lawm reworked?
Cov teeb meem me me (piv txwv li, gloss tsis txaus): stripping thiab re-plating tau txais.
Kev puas tsuaj loj (piv txwv li, adhesion tsis zoo, plating ploj): ua kom tiav (siv cov tshuaj stripping kom tshem tawm cov zinc txheej) yuav tsum tau, ua raws li re-pretreatment thiab re-plating.
Rework yuav tsum tau txwv kom tsis txhob muaj corrosion ntau dhau ntawm cov substrate.
Dab tsi yog cov pa phem tseem ceeb hauv cov dej khib nyiab uas tsim los ntawm electrogalvanizing, thiab lawv kho li cas?
Cov pa phem tseem ceeb: zinc ions, cyanide (hauv cyanide- muaj cov txheej txheem), acid/alkali, thiab cov khoom seem ntxiv.
Txoj kev kho: Neutralization (pH hloov kho) → nag lossis daus (ntxiv reagents rau precipitate hnyav hlau ions) → Lim → Tshem tawm raws li cov qauv.
Dab tsi yog qhov zoo ntawm chromium-dawb passivation tshaj li ib txwm chromate passivation?
Nws tsis muaj hexavalent chromium (muaj kuab lom thiab carcinogenic) thiab ua raws li cov qauv ntawm ib puag ncig (xws li RoHS thiab REACH).
Nws txo cov kev phom sij rau kev noj qab haus huv rau cov neeg ua haujlwm thiab txo qhov nyuaj ntawm kev kho dej khib nyiab.