1. Cov hom phiaj tseem ceeb ntawm pre - kev kho
Tshem tawm impurities: ua kom huv si tshem roj, xeb, nplai, thiab lwm yam, kom tiv thaiv kev tsis txaus siab los ntawm kev ua rau cov txheej txheem.
Kev ua kom muaj zog: nce qhov saum npoo av ntawm cov qauv ua haujlwm lossis cov qauv siv lub cev (xws li cov yeeb yaj kiab posphall) txhawm rau txhim kho cov nplaum ntawm txheej.
Isti - corrosion ua ntej {}}}}}}}}}}}} Kev Kho Mob Los ntawm kev ua haujlwm ntawm corrosion nws tus kheej thiab ncua tag nrho cov kev pabcuam lub neej ntawm txheej.
2. Xaiv ua ntej - kev kho cov kauj ruam raws li cov khoom siv ntawm workpiece
Cov khoom sib txawv ntawm cov khoom sib txawv (steel, txhuas alloy, zinc alloy, thiab lwm yam) sib txawv, thiab ua ntej} kev kho mob yuav tsum tau tsim tshwj xeeb:
1. Cov khoom hlau (feem ntau)
Cov saum npoo hlau yog nquag mus rau xeb thiab feem ntau nqa cov roj yob, txiav roj thiab lwm yam roj. Lub pre {{{{{}}} kev kho mob yuav tsum tau coj mus rau hauv tus account degreasing, xeb tshem tawm thiab hloov cov yeeb yaj kiab ua yeeb yaj kiab.
Cov kauj ruam qub:
Pre - Cov roj loj: tshem tawm cov roj uas ntab
Lub ntsiab tseem ceeb: toblly tshem tawm residual grease (sib xyaw ua txau + immersion kom txhim kho cov nyhuv degreasing).
Kev ntxuav dej 1: Yaug cov neeg sawv cev rov qab ua haujlwm (ntws cov dej huv kom tsis txhob muaj kua qaub thiab alkali seem cuam tshuam rau cov kauj ruam tom ntej).
Rust tshem tawm (yog tias xeb): Siv cov roj acid acid, xws li citric acid (muaj xeb lossis tshuaj tsuag, tswj lub sijhawm kom tsis txhob muaj {{0} {corrosion).
Dej ntxuav 2: yaug tus xeb remover los tiv thaiv cov kua qaub.
Kev Hloov Deg: Kho cov kev ua si ntawm colloidal titanium phosphating tov khoom ua yeeb yaj kiab ntxiv thiab nplua (immerse rau 1-3 feeb, chav sov).
Phosphating: Daim Ntawv Phosphate hloov dua siab tshiab (Zinc {{{{{mangasion series), txhim kho lossis tsuag, zas xis 1-5g / m²).
Dej ntxuav 3: Tshem tawm cov tshuaj phosphatating tov.
Cov dej ntshiab ntxuav: yaug nrog dej deesized kom tsis txhob cuam tshuam rau cov kab uas zoo rau cov txheej txheem (kev cog lus xav tau tsawg dua lossis sib luag rau 50μs / cm).
DRYING: Tshem tawm cov nplaim noo (ntsuas kub 80-120 degree, kom ua kom tiav kom tsis txhob blisting ntawm txheej).
NCO TSEG: Yog tias tus ua haujlwm tsis muaj xeb (xws li txias - rolled steel phaj), "Rust tshem tawm" Kauj Ruam tuaj yeem raug rho tawm; Rau cov scenes nrog cov siab heev rau corrosion tsis kam (xws li kev kho tsheb ntau ntxiv ), phosphorus kev kho tau tuaj yeem siv tau (ib puag ncig phooj ywg, hloov tsoos phosphalating).
2. Aluminium alloy feem
Qhov saum npoo ntawm txhuas alloy muaj cov yeeb yaj kiab oxide ntuj (al₂o₃), tab sis nws yog nyias thiab tsis sib luag. Qhov pretreatiction xav tau kom tshem roj thiab tsim cov kev hloov pauv hluavtaws sib hloov pauv (xws li chromate passivation, chromium {{1} free passivation).
Cov kauj ruam qub:
Degreasing: Siv ib qho tsis muaj zog alkaline lossis nruab nrab Degasing tus neeg sawv cev (zam kev ua kom muaj zog alkaline corrosion ntawm lub ntsej muag txhuas) kom tshem tawm roj txhuas) kom tshem tawm roj txhuas) kom tshem cov roj.
Dej ntxuav 1: yaug txoj kev saib xyuas tus neeg sawv cev degreasing.
Alkali Etching (yeem): Siv cov dilute sodium hydrocide kom tshem tawm cov khaub ncaws oxrod thiab burr
Kev ua kom tawg: Siv nitric acid lossis hydrofluoric acid rau neutralize cov kev daws teeb meem alkali thiab rov qab ua kom pom ntawm lub aluminium.
Dej ntxuav 2: yaug kom huv.
Passivation: Ua ib qho kev txhim kho corrosion - tiv taus kev hloov pauv zoo, tab sis tsis yog siv cov txiaj ntsig dawb, tab sis tam sim no feem ntau siv los ua kom tau raws li kev tiv thaiv ib puag ncig).
Dej ntshiab ntxuav: yaug nrog dej deestized.
Kom qhuav: Tsis muaj kub kom qhuav (60-80℃los tiv thaiv deformation ntawm txhuas alloy).
3. Zinc Alloy Qhov Chaw
Zinc Alloy cov chaw nto yog nquag mus dawb xeb, thiab cov khoom siv kuj yuav tsum tau maj mam ua kom tsis txhob xeb.
Cov kauj ruam qub:
Degreasing: nruab nrab lossis tsis muaj zog acidreat tus neeg sawv cev kom tshem tawm cov roj stains (zam cov tshuaj alkaline muaj zog los ntawm corroding zinc).
Dej ntxuav 1: Yaug.
Ua kom muaj: Siv Dilute Nitric acid los yog organic acid rau me ntsis thiab tshem tawm cov txheej oxide (lub sijhawm luv, txog 30 vib nas this {1} feeb).
Dej ntxuav 2: Yau.
Passivation: Siv Chromate lossis chromium - sulivation (xws li kev kho kom dawb) los ua zaj duab xis tiv thaiv.
Cov ntshiab dej ntxuav + kom qhuav: tib yam li kev kho kom zoo li aluminium.
3. Kho cov kauj ruam raws li lub xeev saum npoo ntawm lub workpiece
Cov haujlwm tshiab uas tsis muaj xeb thiab roj av kom yooj yim rau "degreasing rau" degreasing rau "degreasing kom yooj yim → sab saum toj → dej ntxuav → kom qhuav".
Cov neeg ua haujlwm qub uas muaj xeb hnyav: yuav tsum tau ntxiv "Sandblasting / txhaj tshuaj blasting" lub cev xeb tshem tawm cov kauj ruam), lossis ncua cov tshuaj muaj xeb RIAV RIAV.
Precision seem / thin -}}} {{1} {{1} - kub phosphating cov txheej txheem los tiv thaiv kev ua haujlwm tsis zoo.
4. Txhim kho raws li txheej ua kom ua tau zoo
High corrosion Kuj yuav tsum tau ua (xws li cov khoom siv sab nraum zoov): Yuav tsum muaj cov kauj ruam sab nraum zoov): thiab ntom thiab ntom nti ntau dua lossis sib npaug zos rau 3G / m²).
Cov khoom siv zoo nkauj (xws li cov khoom siv hauv tsev, cov khoom siv hauv tsev): ntxiv dag zog rau qhov tsis zoo thiab ntxuav kom tsis txhob ua rau cov khoom thiab shrinkage ntawm txheej deg; Ntxiv "electrolytic polishing" cov kauj ruam los txhim kho saum npoo ua tiav.
Cov cheeb tsam muaj kev tiv thaiv nruj ib puag ncig: Chromate boscharating thiab phosphorus phosphaating, thiab kho kom dawb huv si (zirconium conversion zaj duab xis) yog siv xwb.
V. Cov Ntsiab Lus Tseem Ceeb
Tus neeg sawv cev tus neeg sawv cev thiab ntsuas kub: nruj me ntsis tswj hwm thiab kub ntawm cov tshuaj tsw qab thiab cov tshuaj tsw qab ntawm cov tshuaj tsw qab (xws li tag nrho cov acidity ntawm phosphating tov), thiab kho kom meej thiab kho kom ntseeg tau tias muaj kev kho cov nyhuv ruaj khov.
Kev ntxuav ua kom zoo: Txhua cov txheej txheem ntxuav yuav tsum kom tsis txhob muaj tus neeg sawv cev dhau los ntawm kev coj mus rau cov yeeb yaj kiab phosphalating tom ntej, thiab acid residue yuav corrode txheej).
Kom qhuav kom huv: noo noo cov ntsiab lus ntawm cov workpiece nto yuav tsum tsawg dua lossis sib npaug ntawm cov hmoov kho kom tawg yuav ua rau lub blaping thiab pinholes hauv txheej.
Hauv ntej, kev xaiv ntawm pre - kev kho cov kauj ruam rau cov khoom siv hluav taws xob, thiab cov kev ua haujlwm saum npoo thiab cov kev tiv thaiv nto moo. Tsim nyog ua ntej- kev kho mob tuaj yeem nce cov nplaum ntawm hmoov ntau dua li 3000 teev (deb tshaj 100 teev tsis tau kho ua haujlwm).
