Kub-dip galvanizingyog ib txoj kev dav siv los tiv thaiv hlau thiab hlau los ntawm corrosion. Cov txheej txheem no suav nrog immersing cov hlau hauv da dej ntawm zinc molten, uas ua rau muaj zog, tiv thaiv txheej. Lub resulting galvanized hlau yog heev resistant rau xeb thiab tuaj yeem tiv taus ib puag ncig hnyav. Txawm li cas los xij, kev ua tiav cov txiaj ntsig zoo yuav tsum ua raws li cov cai tshwj xeeb thiab cov kev coj ua zoo tshaj plaws. Kab lus no delves rau hauv cov kev cai tseem ceeb rau kub-dip galvanizing kom ntseeg tau tias cov txiaj ntsig zoo thiab ruaj khov.
1. Kev xaiv cov khoom siv
Thawj qhov yuav tsum tau ua rau kub-dip galvanizing yog xaiv cov khoom tsim nyog. Tsis yog tag nrho cov hlau tsis haum rau cov txheej txheem no. Feem ntau, hlau thiab hlau yog thawj tus neeg sib tw. Qhov sib xyaw ntawm cov hlau tuaj yeem cuam tshuam qhov zoo ntawm cov khoomgalvanizing. Piv txwv li, muaj cov ntsiab lus xws li silicon thiab phosphorus hauv cov hlau tuaj yeem cuam tshuam lub thickness thiab cov tsos ntawm zinc txheej. Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tau xaiv cov ntaub ntawv uas muaj kev tswj hwm thiab paub cov ntsiab lus kom ua tiav cov txiaj ntsig zoo ib yam.
2. Kev npaj nto
Kev npaj deg yog ib kauj ruam tseem ceeb hauv kevkub-dip galvanizingtxheej txheem. Cov hlau saum npoo yuav tsum huv thiab tsis muaj kab mob xws li roj, roj, xeb, thiab zeb nplai. Txhua yam impurities tuaj yeem tiv thaiv zinc los ntawm kev ua kom zoo, ua rau cov txheej txheem tsis zoo. Kev npaj nto feem ntau muaj peb theem:
- Degreasing: Tshem tawm cov kab mob organic siv cov tshuaj alkaline lossis cov kuab tshuaj.
- Pickling: Tshem tawm cov xeb thiab nplai siv cov kua qaub, feem ntau yog hydrochloric lossis sulfuric acid.
- Fluxing: Siv cov tshuaj flux, feem ntau zinc ammonium chloride, los tiv thaiv oxidation ua ntej immersion nyob rau hauv cov zinc molten.
Kev npaj saum npoo kom zoo ua kom muaj kev sib raug zoo ntawm cov hlau thiab zinc txheej, txhim kho cov kav ntev thiab kev ua haujlwm ntawm galvanizing.
3. Chav da dej thiab qhov kub thiab txias
Qhov muaj pes tsawg leeg thiab kub ntawm zinc da dej yog qhov tseem ceeb hauv cov txheej txheem kub-dip galvanizing. Zinc da dej yuav tsum muaj tsawg kawg yog 98% cov zinc ntshiab, nrog rau feem pua ntawm cov khoom seem xws li txhuas, txhuas, thiab antimony los txhim kho cov txheej txheem. Lub da dej kub feem ntau yog nyob nruab nrab ntawm 820 ° F thiab 860 ° F (438 ° C txog 460 ° C). Kev tswj xyuas qhov kub thiab txias yog qhov tseem ceeb rau kev ua tiav cov txheej txheem zoo thiab cov txheej txheem zoo. Kev sib txawv tuaj yeem ua rau muaj qhov tsis xws luag xws li qhov tsis sib xws, tsis zoo adhesion, thiab roughness ntawm qhov chaw.
4. Lub Sijhawm Raus Dej
Lub sij hawm immersion nyob rau hauv zinc da dej yog lwm qhov tseem ceeb parameter. Nws nyob ntawm qhov tuab thiab qhov loj ntawm lubhlau yog galvanized. Feem ntau, cov hlau yog immersed kom txog thaum nws ncav cuag qhov kub ntawm da dej, tso cai rau zinc los tsim ib daim ntawv cog lus metallurgical nrog cov hlau. Over-immersion tuaj yeem ua rau ntau txheej txheej thickness, thaum under-immersion tuaj yeem ua rau muaj kev tiv thaiv tsis txaus. Yog li ntawd, kev tswj xyuas meej ntawm lub sijhawm immersion yog tsim nyog los ua kom tiav cov txheej txheej thickness thiab zoo.
5. Kev kho tom qab Galvanizing
Tom qab cov hlau raug tshem tawm ntawm lubzinc da dej, nws undergoes post-galvanizing kev kho mob los txhim kho cov txheej txheem. Cov kev kho mob no yuav suav nrog quenching hauv dej los yog cua txias kom ua kom cov zinc txheej sai sai. Tsis tas li ntawd, kev kho mob passivation tuaj yeem siv los tiv thaiv kev tsim cov xeb dawb, ib hom kev xeb uas tuaj yeem tshwm sim ntawm qhov chaw tshiab galvanized. Kev tuav thiab khaws cia cov ntaub ntawv galvanized yog qhov tseem ceeb los tswj cov txheej txheem kev ncaj ncees.
6. Kev tshuaj xyuas thiab kev tswj xyuas zoo
Thaum kawg, kev tshuaj xyuas kom zoo thiab kev tswj xyuas zoo yog qhov tseem ceeb los xyuas kom meej qhov ua tiav ntawm cov khoomkub-dip galvanizingtxheej txheem. Kev tshuaj xyuas feem ntau suav nrog kev ntsuas qhov muag, ntsuas qhov tuab, thiab kev ntsuas adhesion. Cov qauv xws li ASTM A123 / A123M muab cov txheej txheem rau cov txheej txheem siv tau zoo thiab zoo. Ua raws li cov qauv no kom ntseeg tau tias cov khoom siv galvanized ua tau raws li cov qauv kev ua tau zoo thiab muab kev tiv thaiv ntev tiv thaiv corrosion.
Xaus
Kub-dip galvanizing yog ib txoj hauv kev zoo rau kev tiv thaiv cov hlau thiab hlau los ntawm corrosion, tab sis nws yuav tsum tau ua tib zoo saib xyuas kom meej thiab ua raws li cov cai tshwj xeeb. Los ntawm kev xaiv cov khoom siv thiab kev npaj saum npoo mus rau da dej muaj pes tsawg leeg, lub sij hawm immersion, thiab kev kho tom qab galvanizing, txhua kauj ruam ua lub luag haujlwm tseem ceeb hauv kev ua tiav cov txheej txheem zoo thiab ruaj khov galvanized. Los ntawm kev ua raws li cov kev coj ua zoo tshaj plaws no thiab tswj xyuas kev tswj xyuas kom zoo, cov tuam ntxhab tuaj yeem xyuas kom meej tias lawv cov khoom siv galvanized xa cov kev ua tau zoo thiab kev ua haujlwm ntev.
Post lub sij hawm: Sep-18-2024