Vim muaj ntau cov av, plua plav, roj, dej, xeb, thiab lwm yam organic lossis inorganic pollutants ntawm cov hlau nto, nws cuam tshuam rau qhov ntub dej ntawm cov nplaum. Txhawm rau txhim kho lub zog sib txuas, txhua yam, lub cev, tshuaj lom neeg thiab lwm txoj hauv kev yog siv los ntxuav, ntxhib, thiab ua kom lub ntsej muag ntawm cov nplaum, hloov cov khoom nto, ua kom zoo infiltration ntawm cov nplaum, ruaj khov, thiab txhim kho cov kav ntev. thiab kev pabcuam lub neej ntawm kev sib koom ua ke. Tom qab kev kho deg, cov hlau saum npoo tuaj yeem hloov mus rau hauv qhov chaw ua haujlwm nrog lub zog saum npoo, kev ua haujlwm siab, thiab thaj chaw muaj txiaj ntsig zoo.
Cov txheej txheem kev kho saum npoo siv feem ntau suav nrog kev kho degreasing, kho tshuab, thiab kev kho tshuaj. Cov txheej txheem tshwj xeeb yog siv cov tshuab polishing thiab sandblasting kom tshem tawm cov organic lossis inorganic txo cov tshuaj uas tsis tsim nyog rau kev sib txuas ntawm qhov chaw, muab qhov tsim nyog roughness rau saum npoo, ua kom muaj kev sib raug zoo ntawm thaj chaw, txo cov khoom sib tiv tauj lub kaum sab xis, txhim kho lub wettability. cov nplaum rau ntawm qhov chaw ntawm cov nplaum, thiab txhim kho adhesion kev ua tau zoo. Feem ntau, kev kho qhov chaw ntawm cov hlau saum npoo tuaj yeem ua tau los ntawm kev siv cov txhuam hlau, cov tshuab sib tsoo, los yog cov ntawv xuab zeb kom tshem tawm cov txheej oxide xoob ntawm qhov chaw, los yog txoj kev kho tshuaj lom neeg=
Yog hais tias lub tshuab hluav taws xob los yog cov ntaub ntawv sib txuas yog cov roj hmab, lub tshuab txav tau yooj yim los yog hlau txhuam tuaj yeem siv rau kev kho roughening. Yog tias qhov sib txuas ntawm cov ntaub yog ntaub, lub tshuab hluav taws xob xaim hluav taws xob yuav tsum tau siv rau roughening. Tom qab roughening, qhov saum npoo yuav tsum tau ntxuav nrog tus neeg saib xyuas kom tshem tawm cov av. Tom qab ntxuav, nws yog ib qho tsim nyog yuav tsum muaj lub sij hawm ziab kom qhuav, txwv tsis pub cov residual hnyav ntawm cov nplaum nplaum yuav cuam tshuam rau lub zog sib txuas. Tom qab ntawd, siv cov txhuam hniav kom sib npaug thiab nrawm nrawm rau txheej txheej ntawm cov hlau primer rau ntawm qhov chaw npaj kom tsis txhob muaj kev sib kis ntxiv, txuas ntxiv lub sijhawm cia ntawm cov hlau kho, thiab tseem pab txhawb kev ntub dej ntawm qhov chaw los ntawm cov nplaum, txhim kho nws lub zog sib txuas thiab durability.
