Deg ua ntej kho
Yog tias muaj impurities, roj, roj thiab fouling ntawm qhov chaw, lawv yuav tsum tau muab tshem tawm raws li txoj kev ntxuav hauv SY/T0407 ntawm Txoj Cai rau Pretreatment of Steel Surface Ua ntej Txheej.
Cov hlau saum npoo yuav tsum tau txau kom tshem tawm xeb raws li txoj kev teev tseg hauv SY/T0407. Thaum ua cov txheej txheem txau, nws yuav tsum tau nqa tawm nyob rau hauv qhov kev txiav txim ntawm thawj sab saum toj, ces phab ntsa thiab hauv qab. Kev tshem tawm xeb zoo yuav tsum ncav cuag qib Sa2.5 teev nyob rau hauv GB / T 8923-1998 "Corrosion qib thiab xeb tshem tawm qib ntawm steel nto ua ntej pleev xim", thiab lub thauj tog rau nkoj qhov tob yog xaiv raws li qib anti-corrosion, zoo tib yam yam: 40m. Xaiv 6-8mm nozzle, nozzle inlet compressed cua siab 0. }} hli. Thaum sandblasting nyias steel phaj, cov xuab zeb particle loj thiab huab cua siab yuav tsum raug txo kom tsim nyog, thiab lub nozzle yuav tsum tsis txhob siv txuas ntxiv thaum hnav cov nyiaj ntawm qhov hluav taws xob sandblasting kawg thiab txoj kab uas hla tshaj 1/2 ntawm qhov pib sab hauv. Qhov saum npoo pretreatment ntawm qhov txuas yuav tsum yog tib yam li ntawm qhov tseem ceeb.
Tom qab txau, qhov chaw yuav tsum tau purged nrog qhuav, huv si, tsis muaj roj compressed cua.
Tom qab tshuaj tsuag derusting, qhov tsis xws luag tshwm sim los ntawm cov hlau nto thiab welds yuav tsum tau kho.
Kev ntsuas kev nyab xeeb: khaws lub qhov cua kom cov kuab tshuaj hnyav qis dua qhov txaus ntshai concentration, cov neeg ua haujlwm tshuaj tsuag hnav cov khaub ncaws tiv thaiv thiab lub qhov ncauj qhov ntswg, thiab ntxuav tam sim ntawd tom qab cov tshuaj tsuag cov yeeb nkab kov lub qhov ntswg nrog hauv av.
Xim formulation
Yog tias cov xim tiv thaiv corrosion yog ob txheej txheej, ob lub ntsiab lus tuaj yeem muab sib xyaw thiab tsim ua ntej daim ntawv thov, thiab nws tau lees paub ua ntej kev npaj seb cov khoom A thiab B sib raug zoo li cas, seb lawv puas ua raws li cov qauv kev thov, thiab seb lawv tsis raug.
Ua ntej xa cov pab pawg A thiab B, lawv yuav tsum tau nplawm kom txog thaum lub hauv qab tsis muaj cov deposits thiab uniform nce thiab nqis.
Ib qho me me ntawm cov txheej txheem txheej txheem yog npaj raws li qhov kev faib ua feem xav tau los ntawm phau ntawv qhia, thiab cov viscosity raug kho nrog ib qho tshwj xeeb diluent kom ua tiav cov txheej txheem txheej txheej zoo tshaj plaws thiab xyuas kom cov tuab thiab zoo ntawm ib zaj duab xis.
Raws li thaj tsam txheej thiab lub thickness ntawm ib txheej txheej zaj duab xis, xam qhov ntau npaum ntawm A thiab B Cheebtsam, thiab tswj tus nqi ntawm cov khoom xyaw uas yuav tsum tau siv nyob rau hauv 6 teev kom tsis txhob noj ntau dhau lawm, daim ntawv thov tshaj sij hawm thiab kev kho ntau dhau thiab thickening. txheej txheej cuam tshuam rau qhov zoo ntawm cov zaj duab xis txheej.
Tus nqi tshwj xeeb thinners rau txheej txheej yuav tsum tswj kom tsis pub tshaj 15 feem pua (txhaj tshuaj) lossis 8 feem pua (txhaj tshuaj txhuam) ntawm tag nrho qhov hnyav, ntxiv cov khoom A rau qhov sib piv thiab nplawm tusyees, thiab tom qab ntawd ntxiv cov khoom B kom do rau {{ 2}} feeb kom siav cov Cheebtsam A thiab B, thiab thaum kawg sawv rau 15-20 feeb kom tshem tawm cov cua npuas qhia los ntawm nplawm. Qhov ntev ntawm stirring thiab cia lub sij hawm yog nyob ntawm tus nqi ntawm cov khoom xyaw.
Cov xim sib xyaw tuaj yeem txau tom qab lim nrog 100 mesh lim. Thaum cov xim overreacts thiab thickens thaum lub sij hawm txau, nres tam sim ntawd. Yog tias cov xim tau muab pov tseg, nws yuav tsum tau rov ua dua. Lub sij hawm txheej txheej overreaction muaj feem xyuam rau qhov kub thiab txias, lub sij hawm xav tau rau qhov kub thiab txias yog luv luv, thiab cov khoom yuav tsum tsis tshua muaj kev sib tw, ntawm qhov tsis sib xws, qhov kub thiab txias yuav siv sij hawm ntev, thiab cov khoom xyaw yog tsim nyog.
