TAA technical department ntseeg hais tias deg pretreatment plays lub luag hauj lwm tseem ceeb tshaj plaws nyob rau hauv kev ua tau zoo ntawm txheej.Ntawm ntau yam cuam tshuam rau kev ua tau zoo ntawm cov txheej txheem, kev kho deg yog qhov tseem ceeb tshaj plaws.

Deg pretreatment yog ib qho haujlwm yooj yim

Deg pretreatment tuaj yeem tsim cov xwm txheej rau txheej txheej nrog kev ua tau zoo hauv ob yam: hauv kev siv tshuab, nws muab qhov chaw roughness rau coatings;Thiab nyob rau hauv tshuaj, nws ua rau cov molecules ntawm txheej nyob rau hauv kev sib cuag nrog lub nto ntawm steel substrate.

kov yeej qhov tsis zoo ntawm qhov chaw durautxheej

Yog hais tias lub npoo yog du, yuav tsis muaj qhov zoo adhesion ntawm txheej thiab saum npoo, thiab txheej txheej ntawm qhov chaw tuaj yeem raug tshem tawm tsis muaj zog.Ntawm qhov tsis sib xws, yog tias qhov chaw ntawm lub workpiece yog ntxhib li cov ntawv xuab zeb, nws tsis yooj yim rau tshem tawm cov txheej.

Tom qab txhaj tshuaj peening (xuab zeb blasting) kev kho mob, cov hlau nto yuav ntxhib li cov ntawv xuab zeb, uas yog qhov peb feem ntau hu ua deg roughness.

Cov tshuaj phem tsis pom qhov muag pom

Thaum lub sij hawm kho deg ntawm rusted steel qauv ua ntej tha xim, qhov chaw uas qhia corrosion pits tom qab txhaj tshuaj blasting (tshwj xeeb tshaj yog nyob rau hauv qab ntawm corrosion pits) yuav muaj soluble ntsev.Kev txhaj tshuaj qhuav blasting tsis tuaj yeem tshem cov ntsev no.Yog li ntawd, ua ntej pleev xim, nws yog qhov zoo tshaj plaws los xyuas seb puas muaj cov ntsev soluble thiab lawv cov concentration ntawm qhov chaw ua haujlwm nrog lub ntsuas ntsuas tshwj xeeb.Yog hais tias qhov concentration ntawm soluble ntsev ntau tshaj qhov tso cai, ntsuas yuav tsum tau muab tshem tawm.

Qib ntxuav

Kev lag luam yog ib qho teeb meem uas peb yuav tsum xav txog thaum txiav txim siab txog qib kev ntxuav.Feem ntau hais lus, qhov siab dua qhov yuav tsum tau ua kom huv huv, tus nqi ntawm kev ntxuav ntau dua.Rau kev tu lub ntsej muag steel, qhov yuav tsum tau ua kom huv ntawm cov qib tu kom zoo tshaj plaws (SA 3) yog kim dua li cov qib tsis huv (SA 2).Kev ntxuav ntawm cov hlau steel siv nyob rau hauv qhov hnyav corrosive ib puag ncig yuav tsum tau mus txog qib siab, tab sis nyob rau lwm lub sijhawm, tus nqi-zoo ntawm txheej txheej kev pab cuam lub neej kuj yog ib qho tseem ceeb hauv kev xaiv cov qib tu.

Lub workpiece kho nrog cov hlau tsis muaj hlau tsis muaj Fe atom residue thiab tsis yooj yim rau xeb thiab tsis muaj xim, tab sis nws muaj qhov crushing siab, plua plav loj thiab muaj kuab paug loj, uas tsis ua raws li cov kev cai ntawm kev tiv thaiv ib puag ncig.TAAstainless hlau grit tuaj yeem daws cov teeb meem tau ntsib.Nyob rau hauv ib qho tshwj xeeb tu, lub workpiece yuav tsum tsis tsuas yog kom tsis txhob muaj corrosion thiab discoloration tom qab kev kho mob saum npoo, tab sis kuj yuav tsim ib tug tej yam roughness ntawm lub nto thiab ua kom txaus adhesion tom qab txheej.

Covhlaugritua ntawmhigh carbon steel txhaj tshuajtuaj yeem ua tau raws li qhov yuav tsum tau ua tom qab ntxuav, tab sis Fe atoms yuav nyob twj ywm ntawm qhov chaw, ua rau xeb thiab tawg thiab cuam tshuam rau cov txheej txheem zoo.

Stainless hlau txiav hlautuaj yeem tiv thaiv qhov chaw ua haujlwm los ntawm xeb thiab tsis muaj xim, tab sis nws yuav dhau los ua puag ncig thaum lub sijhawm tawg, yog li nws tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua.

Stainless hlau grit yog cov khoom siv tsis zoo grit particle, nws tuaj yeem tsis tsuas yog daws qhov teeb meem ntawm corrosion thiab discoloration vim residual Fe atoms, tab sis kuj ua cov npoo thiab cov ces kaum los tsim qhov xav tau thauj tog rau nkoj qhov tob, txhim kho cov txheej txheem zoo thiab ua tau raws li cov txheej txheem txheej txheem.Nws muaj kev lag luam dav dav.

Ntxiv rau, stainless hlaugrittuaj yeem hloov ntau yam ntxhia xuab zeb thiab tsis yog xim hlau abrasives, xws li alumina oxide, emery, quartz xuab zeb, iav hlaws, thiab lwm yam.

Piv nrog cov tsis-hlau abrasives,stainless hlaugrit tuaj yeem coj tus nqi qis dua, txo cov plua plav tawm, txo cov plua plav tshem tawm thiab txhim kho qhov chaw ua haujlwm.

Daim ntawv thov ntawm stainless hlau grit: