Yuav ua li cas kom ntseeg tau ntawm txheej txuas ntawm S235jr Galvanized khoom?
Ua kom cov txheej txuas ntxiv ntawm S235jr Galvanized khoom (piv txwv li, cov zinc zawv li cas yog qhov tseem ceeb plating thiab pinholes) yog qhov tseem ceeb rau kev ua kom nws corrosion tsis kam. Qhov no yuav tsum tsis txhob tswj hwm ntau theem, suav nrog cov txheej txheem pretrice, galvanizing tswj, thiab kev txij nkawm. Kev ntsuas tshwj xeeb yog raws li hauv qab no:
1. Substrate Pretreatment: Tshem tawm cov kev ua kom ntseeg tau kom ntseeg tau cov nplaum ntawm zinc txheej.
S235JR yog qhov qis-} cov hlau, thiab nws cov nplaim hluav taws xob muaj kev cuam tshuam nrog cov khoom siv xws li, xeb, roj, thiab vuam slag. Cov impurities no tuaj yeem sib tham txog ntawm cov kev daws zinc zinc thiab lub substrate, ua rau ploj plating. Pretricalment yuav tsum muaj cov hauv qab no:
Ncab
Siv cov tshuaj ntxuav alkaline (xws li sodium hydroxide tov), pickling (hydrochloric acid), lossis ultrasonic tu kom huv si rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling rolling RESIDUA ROJ tuaj yeem tsim "Roj me ntsis," tiv thaiv cov txheej zinc los ntawm adhering thiab ua rau ploj mus rau plating cov ntsiab lus.
Tom qab tu, yaug nrog dej huv los tiv thaiv cov khoom siv huv si acid los yog alkali los ntawm corrooring lub substrate lossis cuam tshuam rau kev ua tiav. Xeb thiab Teev Tshem Tawm
S235jr kub - rolled steel feem ntau muaj cov nplai (feo, thiab lwm yam raws li sandblasting lossis txhaj tshuaj tiv thaiv blasting). Tsis tiav nplai tiv thaiv cov zinc daws los ntawm kev tawm tsam nrog lub hauv paus hlau, ua rau "dub pob" lossis plating khoob.
Tom qab pickling, ib qho "kev ua kom zoo" (xws li cov khoom siv oxidation dip) thiab ua kom cov qauv tshiab me me ntawm cov txheej zinc.
Kho cov pib tsis xws luag
Tshawb xyuas cov khoom siv hauv paus saum npoo rau cov tshuab tsis xws li cov kab nrib pleb, quav, thiab pits. Cov chaw no tuaj yeem yooj yim ua rau impurities, tiv thaiv cov kev daws zin tov los ntawm txhaws thaum Galvanizing, ua rau cov plating plating plating plating. Pre ...-}} kev sib tsoo lossis kev kho kom pom zoo kom ua kom muaj qhov chaw du. Ii. Kub - dip galvanizing txheej txheem tswj: Ua kom cov kev pab them hluav taws xob uas muaj kev sib txuam nrog cov Galvanizing daws
Kub -} dip galvanizing (txuas ntxiv lossis batch galvanizing) yog feem ntau siv galvanizing hom rau s235jr. Txheej txheem tsis ncaj qha cuam tshuam ncaj qha rau kev txuas ntxiv ntawm zinc txheej:
Zinc Solution thiab qhov kub
Zinc daws purity: impurities xws li txhuas cov ntsiab lus yuav txo cov ntsiab lus zinc yuav txo qis cov ntsiab lus admedion, thaum muaj ntau dhau yuav cuam tshuam zinc spang morphology). Qhov no tiv thaiv impurities los ntawm kev tsim "zinc Slag" uas ua raws li cov txheej txheem substrate, ua rau thaj chaw tsis muaj zinc txheej.
Tswj kub thiab ntsuas kub: Qhov zinc ntshiab kub yog feem ntau ntawm 440-460℃(rau cov hlau me). Kev kub siab dhau heev txo cov kua ntawm cov kua zinc tov, yooj yim coj mus rau kev tsim cov zinc nodules. Kev siv kub ntau dhau ntxiv nce cov viscosity ntawm zinc kev daws, ua rau tusyees lub tsho tiv no nyuaj (xws li cov khaub ncaws thiab muaj peev xwm ua rau muaj yees.
Zinc ntsw sij hawm thiab nrawm: lub sijhawm dipping yuav tsum tau kho raws li cov chaw tuab silstrate (feem ntau yog tsis txaus ntshai xws li weld seams thiab perforations. Lub sijhawm luv luv yuav ua rau cov txheej alloy ua tsis tau rau hauv qee thaj chaw, thaum lub sijhawm ntev dhau yuav ua rau npau taws. Lub workpiece yuav tsum muab tso rau hauv thiab tawm ntawm cov da dej zinc ntawm lub nrawm nrawm kom tsis txhob muaj kev kub ntxhov uas tuaj yeem ua rau muaj kev sib tsoo thiab muaj hlau hauv zos. "
Kev Kho Mob Flux
Pretreated workpieces yuav tsum tau tais nyob rau hauv flux (xws li zinc chloride - ammonium tshuaj daws) ua yeeb yaj kiab tiv thaiv. Qhov no tiv thaiv theem ob oxidation ntawm substrate ua ntej nkag mus rau qhov zinc da dej thiab txhawb nqa cov tshuaj tiv thaiv ntawm cov da dej zinc thiab substrate. Flux concentration thiab kub (feem ntau 60-80 degree) yuav tsum ruaj khov, tsis li ntawd "nyuaj plating" (tsis muaj zog zinc nplaum lossis ib nrab poob ntawm zinc txheej) tuaj yeem yooj yim tshwm sim.
III. Tshaj tawm {-} ua thiab kev tshuaj xyuas zoo: ntes kom sai thiab kho tej yam tsis xws luag
Cua txias thiab passivation
Tom qab tshem tawm ntawm cov da dej zinc, qhov ua haujlwm yuav tsum tau txias qeeb (kom tsis txhob tawg ntawm cov txheej zinc tshwm sim los ntawm kev txias nrawm). Tom qab txias, kev kho mob passivation (xws li chromate lossis chromium {{1} Free passionive pinholes thiab txhim kho corrosion tsis kam. Kev Tshuaj Xyuas nruj
Cov tsos tshuaj xyuas: visually lossis nrog kev pabcuam ntawm lub khob loj dua, kuaj xyuas cov plinc me ntsis), thiab cov khoom lag luam uas nthuav tawm), thiab cheeb tsam zinc txheej tsis zoo los ntawm zinc nodules. Tsom rau cov cheeb tsam uas ploj lawm plating, xws li cov ces kaum, welds, thiab grooves.
TXHEEJ TXHEEM NTXIV: Rau cov khoom tseem ceeb, xws li cov txheej txheem kev sim siab "(qhov twg
Yog tias ploj lawm plating tsis xws luag yog nrhiav pom, cov xuab zeb yuav tsum tau siv los ua polish cov chaw uas ploj lawm kom ua rau cov substrate tshiab. Kev kho plawv zos tuaj yeem ua tau siv zinc txias txau, kov -}}}} cov txheej txheem los xyuas kom meej tag nrho kev txuas ntxiv.
IV. Kev Tu Khoom Siv thiab Tswj Ib puag ncig
Qhov zinc slag rau hauv qab ntawm galvaning tank yuav tsum tau ntxuav kom tiv thaiv nws los ntawm kev ua haujlwm rau cov neeg ua haujlwm "(uas ua rau zinc txheej zais cia).
Cov khoom siv conveyor ntawm cov kab ntau lawm (xws li chais thiab hooks) yuav tsum khaws cia kom muaj roj lossis tsis zoo los ntawm kev ua kom cov haujlwm ua haujlwm.
Cov kev daws teeb meem nyob rau hauv pretreaticment tso tsheb hlau luam (degring, thiab fluxing) yuav tsum tau hloov tsis tu ncua los tiv thaiv kev ua kom tsis tu ncua thiab cuam tshuam rau cov txiaj ntsig kev kho mob.