Taw qhia ntawm Acid Pickling thiab Passivation
Cov yeeb nkab steel yog dav siv nyob rau hauv ntau yam lag luam vim lawv zoo heev durability, lub zog, thiab corrosion kuj. Txawm li cas los xij, txhawm rau kom ntseeg tau tias lawv qhov kev ua tau zoo thiab kev ua haujlwm ntev, nws yog ib qho tseem ceeb uas yuav tsum siv txoj kev kho kom zoo xws li steel pickling thiab passivation. Qhov blog no yog lub hom phiaj los ua kom pom qhov tseem ceeb ntawm cov txheej txheem no hauv kev txhim kho qhov zoo thiab kav ntev ntawm cov kav hlau.
Nqe Lus Nug 1: Dab tsi yog Steel Pickling?
Hlau pickling yog cov txheej txheem tshuaj uas cuam tshuam nrog kev tshem tawm cov impurities, xws li xeb, nplai, thiab oxides, los ntawm cov kav hlau. Lub hom phiaj tseem ceeb ntawm pickling yog ntxuav cov hlau nto kom huv si, npaj nws rau kev kho deg tom ntej xws li passivation.
Thaum lub sij hawm pickling txheej txheem, steel kav yog immersed nyob rau hauv ib tug acidic tov, feem ntau muaj xws li hydrochloric los yog sulfuric acid. Cov kua qaub reacts nrog impurities, dissolving thiab tshem tawm lawv los ntawm steel nto, tawm hauv ib tug huv si thiab du tiav.
Tshooj 2: Txoj Kev Pickling:
Cov txheej txheem pickling muaj ob peb kauj ruam los xyuas kom meej qhov zoo tshem tawm ntawm impurities los ntawm steel kav:
Kauj Ruam 1: Degreasing: Ua ntej pickling, cov kav hlau yog degreased kom tshem tawm cov roj, roj, los yog av nyob rau saum npoo. Cov kauj ruam no xyuas kom meej tias cov kua qaub tuaj yeem cuam tshuam ncaj qha nrog cov impurities ntawm cov hlau nto.
Kauj Ruam 2: Acid Immersion: Cov kav dej degreased ces muab tso rau hauv cov kua qaub pickling. Lub sij hawm ntawm immersion nyob ntawm yam xws li hom thiab thickness ntawm oxide txheej. Thaum lub sij hawm immersion, nws yog ib qho tseem ceeb los saib xyuas qhov kub thiab txias ntawm cov kua qaub kom ua tiav cov txiaj ntsig xav tau.
Kauj Ruam 3: Acid Yaug: Tom qab cov txheej txheem pickling, cov kav dej tau muab yaug nrog dej kom tshem tawm cov kua qaub seem. Cov kauj ruam no yog qhov tseem ceeb los tiv thaiv tej yam tshuaj lom neeg uas tuaj yeem tshwm sim thaum kho tom ntej.
Tshooj 3: Qhov tseem ceeb ntawm Steel Pickling:
Cov txheej txheem steel pickling muaj ntau qhov zoo rau cov kav hlau:
1. Kev tshem tawm xeb thiab nplai: Pickling zoo tshem tawm xeb thiab nplai ntawm cov hlau nto. Cov impurities no tuaj yeem cuam tshuam qhov kev ncaj ncees thiab cov tsos ntawm cov kav dej, ua rau kev hnav ntxov ntxov thiab muaj peev xwm ua tsis tiav.
2. Txhim kho Corrosion Resistance: Los ntawm kev tshem tawm impurities, pickling tsim ib tug huv si thiab oxide-dawb nto, txhim khu cov hlau tsis kam mus corrosion. Qhov no yog qhov tshwj xeeb tshaj yog rau cov kav dej siv hauv qhov chaw hnyav lossis raug tshuaj lom neeg thiab ya raws.
3. Enhanced Adhesion: Pickling npaj cov hlau nto los ntawm kev tsim cov roughened kev ntxhib los mos, tso cai rau cov txheej tom ntej los yog kev kho mob kom ua tau zoo dua. Qhov no ua kom zoo dua adhesion ntawm cov xim tiv thaiv los yog coatings, ua rau lub sij hawm ntev ntawm cov kav dej steel.
Tshooj 4: Nkag siab Passivation:
Tom qab pickling, cov kav hlau steel tau dhau los ua cov txheej txheem passivation los tsim cov txheej txheem oxide tiv thaiv ntawm qhov chaw. Qhov no yog ua tiav los ntawm immersing cov kav dej nyob rau hauv ib tug passivating tus neeg sawv cev, feem ntau yog ib tug diluted tov ntawm nitric acid.
Passivation ua rau nyias, pob tshab zaj duab xis ntawm chromium oxide nyob rau saum npoo ntawm cov hlau, uas ua raws li kev tiv thaiv corrosion. Cov txheej no kuj pab tswj cov hlau zoo nkauj zoo nkauj thaum txo qhov kev pheej hmoo ntawm staining lossis discoloration.
Tshooj 5: Cov txiaj ntsig ntawm Passivation:
Passivation muaj ntau yam txiaj ntsig tseem ceeb rau cov kav hlau:
1. Corrosion Resistance: Kev tsim cov txheej txheem oxide tiv thaiv los ntawm passivation ho txhim kho cov hlau corrosion kuj, ua kom lub neej ntev dua thiab txo cov kev tu ncua.
2. Kev thov kom zoo nkauj: Passivation pab tswj qhov pom ntawm cov yeeb nkab steel los ntawm kev txo qis qhov tshwm sim ntawm qhov chaw stains, discoloration, los yog xeb me ntsis. Qhov no yog qhov tshwj xeeb tshaj yog rau cov kav dej siv hauv kev tsim vaj tsev lossis cov khoom siv kho kom zoo nkauj.
3. Kev noj qab haus huv thiab kev nyab xeeb: Passivation tsim cov tshuaj lom neeg tsis zoo, txo qhov kev pheej hmoo ntawm cov hlau leaching lossis paug, tshwj xeeb tshaj yog nyob rau hauv cov kav dej siv rau kev xa dej haus lossis khoom noj khoom haus.
Xaus:
Hauv kev xaus, steel pickling thiab passivation yog cov kauj ruam tseem ceeb hauv kev kho cov txheej txheem rau cov kav hlau. Kev tshem tawm cov impurities los ntawm pickling, ua raws li los ntawm kev tsim cov oxide txheej tiv thaiv nyob rau hauv passivation, ho txhim khu lub durability, corrosion kuj, thiab zoo nkauj thov ntawm steel kav. Los ntawm kev nkag siab txog qhov tseem ceeb ntawm cov txheej txheem no, kev lag luam tuaj yeem ua kom lub neej ntev thiab kev ntseeg siab ntawm cov kav hlau steel hauv ntau yam kev siv, thaum kawg ua rau kev txhim kho kev ua tau zoo thiab cov neeg siv khoom txaus siab.
Post lub sij hawm: Mar-30-2024