1.Vim li cas adhesion txo qis thaum thickness nce?
Internal Stress Accumulation:
Thaum lub sij hawm deposition los yog solidification txheej txheem, internal stress yog generated nyob rau hauv lub txheej. Qhov kev ntxhov siab sab hauv no accumulates thaum lub txheej thickness nce.
Thaum cov kev ntxhov siab sab hauv (tshwj xeeb tshaj yog tensile stress) tshaj qhov sib txuas ntawm cov zinc txheej thiab cov hlau substrate, nws tuaj yeem ua rau txheej txheej arching, microcracks, thiab txawm loj - cheeb tsam tev.
Kev tsim ntawm Brittle Phases (Tshwj xeeb rau Kub-Dip Galvanizing):
Thaum kub-dip galvanizing, cov zinc molten reacts nrog cov hlau substrate los ua ib tug series ntawm hlau-zinc alloy txheej (xws li Gamma, Delta, thiab Zeta theem). Cov khaubncaws sab nraud povtseg no nyuaj thiab nkig nrog cov yas tsis zoo.
Thicker coatings txhais tau tias muaj peev xwm ntev dua cov tshuaj tiv thaiv lub sij hawm, ua rau cov thicker brittle alloy txheej. Nyob rau hauv sab nraud quab yuam (xws li khoov los yog stamping), txheej txheej no yog qhov ua rau tawg thiab adhesion tsis ua haujlwm.
Txo Nto Roughness thiab Mechanical Interlocking:
Ib qho tseem ceeb mechanism rau txheej adhesion yog "txheej txheem interlocking," qhov twg cov ntaub ntawv txheej embeds rau hauv microscopic pits ntawm lub substrate nto.
Thaum cov txheej yog tuab heev, nws "sau" cov micro-roughnesses xws li xim, uas ua rau cov neeg kho tshuab cuam tshuam tsis muaj zog thiab ua rau cov adhesion ntau dua ntawm cov hlau nplaum ntawm cov atoms, uas tsis ruaj khov nyob rau hauv cov ntaub ntawv tuab.
2.Dab tsi yog kev sib raug zoo ntawm qhov adhesion ntawm kub -dip galvanizing thiab nws thickness?
Qhov tsis zoo correlation yog qhov pom tseeb tshaj plaws.
Nce thickness feem ntau txhais tau hais tias lub sij hawm immersion ntev dua nyob rau hauv lub zinc da dej los yog zinc da dej kub, uas yuav ua rau lub overgrowth ntawm ib tug nkig hlau-zinc alloy txheej, heev impairing adhesion. Ib txheej tuab tuab heev -dip galvanized txheej feem ntau muaj cov khoom siv tsis zoo.
3.Qhov kev sib raug zoo ntawm cov adhesion ntawm electroplated zinc thiab nws thickness yog dab tsi?
Kev sib raug zoo kuj tswj tau
Los ntawm kev tswj xyuas qhov tsis zoo xws li qhov ceev tam sim no thiab cov khoom siv ntxiv, cov adhesion zoo tuaj yeem ua tiav dhau ntawm qhov tuab tuab. Txawm li cas los xij, qhov teeb meem ntawm kev ntxhov siab sab hauv tseem muaj, thiab qhov adhesion yuav txo qis thaum lub thickness nce mus txog ib theem.
4.Dab tsi yog kev sib raug zoo ntawm adhesion thiab thickness hauv kub-dip galvanizing-annealing?
Txhim kho los ntawm kev tshaj tawm - ua tiav
Qhov no yog ib qho txheej txheem rau niaj hnub high -kawg galvanized coils (xws li GI). Tam sim ntawd tom qab kub-dip galvanizing, annealing kev kho mob (xws li alloying) yog ua, uas tag nrho transforms cov ntshiab zinc txheej rau hauv hlau-zinc alloy txheej. Txawm hais tias tag nrho cov qauv ua nkig, ib qho kev sib koom ua ke ntawm metallurgical daim ntawv cog lus tiav, thiab nws cov adhesion yog ruaj khov thiab tswj tau rau ib lub thickness.
5.Yuav ua li cas sib npaug thickness thiab adhesion?
Thickness xaiv raws li xav tau:
Kev Tiv Thaiv Kev Tiv Thaiv Corrosion: Hauv qhov chaw muaj corrosive heev (xws li thaj chaw ntug dej hiav txwv thiab de-icing ntsev thaj tsam), yuav tsum muaj txheej zinc tuab dua los muab kev tiv thaiv kev tiv thaiv ntev dua.
Cov Kev Xav Tau Ua: Rau cov khoom uas yuav tsum tau ua kom muaj zog (xws li kos duab sib sib zog nqus thiab ntse -angle flanging), txheej txheej nrog adhesion zoo thiab ductility yuav tsum tau ua ntej. Qhov no feem ntau yuav tsum tau tswj lub siab tshaj plaws thickness los yog xaiv ib hom nrog ib tug siab feem pua ntawm cov ntshiab zinc.
Xaiv hom khoom raug:
Ordinary Kub-Dip Galvanizing: Siv rau kev tiv thaiv corrosion thiab yooj yim sib sau.
Sib sib zog nqus-Drawing Kub-Dip Galvanizing: Siv cov txheej txheem substrate zoo dua thiab ua kom zoo dua qub, muab cov adhesion zoo thiab formability thaum tuav cov thickness.
Alloyed Galvanizing: Qhov saum npoo yog grey tsaus, thiab txheej yog ib qho hlau -zinc alloy. Nws muaj zoo weldability thiab xim adhesion, tab sis nws formability yog phem dua li ib tug ntshiab zinc txheej ntawm tib thickness.
Kev Tswj Xyuas Zoo thiab Kev Xeem:
Lub adhesion thiab formability ntawm galvanized nplooj ntawv ntawm ib lub thickness yog xyuas los ntawm txoj kev xws li bending xeem thiab cupping xeem.
Tus txheej txheem qhia qhov tsawg kawg nkaus dabtsi yog khoov vojvoog los yog cupping tus nqi uas yuav tsum tau ua raws li rau ib tug tej yam thickness.