Zinc Txheej Thickness Standard Rau Kub-Dip Galvanized Bolts

Lub corrosion kuj ntawmkub-dip galvanized boltsnyob ntawm qhov siab - zoo zinc raw cov ntaub ntawv tab sis kuj nyob rau ntawm zinc txheej thickness ntawm bolt nto, uas yog ib qho tseem ceeb. Yog li, puas muaj ib qho tseem ceeb hauv teb chaws tus qauv tswj cov zinc txheej tuab ntawm kub -dip galvanized bolts? Dab tsi yog nws tus qauv kev coj ua?

Ua ntej, nws yuav tsum tau qhia meej: lub thickness ntawm cov pa electrogalvanized txheej rau bolts yog hais txog 7 microns, nrog ib tug tej yam zoo thiab tsis zoo kam rau ua rau txawv specifications. Cov txheej txheem siab tshaj plaws hauv kev lag luam feem ntau tsis tshaj 15 microns. Cov txheej tuab tuab heev tuaj yeem ua rau cov xov adhesion lossis txheej txheej txheej, ua kom zoo electroplating ua tsis tau. Rau cov kub-dip galvanized bolts, zinc txheej thickness muaj meej lub teb chaws tus qauv (xws li GB / T 30790 "Technical Requirements thiab Test Methods for Hot-Dip Galvanized Coatings on Steel and Iron Products"). Ntev-Lub sij hawm ua pov thawj pom tau tias thaum kub-dip galvanized txheej thickness tsawg dua 40 microns, qhov corrosion kuj yuav txo qis. Yog li ntawd, 40 microns yog qhov tsawg kawg nkaus thickness txheem rau zinc txheej. Qhov siab tshaj plaws thickness yuav tsum tau sib phim raws li lub bolt specifications thiab hom, thiab muaj qhov sib txawv ntawm cov thickness siv cov qauv ntawm kub-dip galvanized hex taub hau bolts thiab hex socket taub hau hau screws.

Kub-Dip Galvanized Hex taub hau Bolts

Qhov kub-dip galvanized thickness ntawm hex taub hau bolts yuav tsum tau kho raws li cov xov specifications:

Pib los ntawm M8 specification (tus qauv xov suab ntawm M8 yog 1.25 millimeters), vim yog cov xov me me, cov zinc txheej thickness yuav tsum tau tswj ntawm ib ncig ntawm 50 microns. Cov coatings tuab heev yuav ua rau cov xov sib txawv, ua rau kev sib dhos nyuaj;

Rau hex taub hau boltsntawm M20 thiab saum toj no specifications, qhov kub -dip galvanized thickness tuaj yeem ncav cuag ntau tshaj 70 microns, nrog rau qhov siab tshaj plaws ntawm 120 microns, uas tuaj yeem tsis tsuas yog ua kom muaj kev tiv thaiv corrosion tab sis kuj tsis cuam tshuam rau cov xov haum raug.

Kub-Dip Galvanized Hex Socket Lub Taub Hau Ntsia Hlau

Cov txheej txheem zinc txheej thickness txheem rau hex socket taub hau hau screws yuav tsum tau txo kom tsim nyog. Qhov laj thawj tseem ceeb yog vim li cas lawv tau txais ib lub qhov - hom kev teeb tsa, thiab cov txheej txheej tuab heev yuav tiv thaiv cov cuab yeej teeb tsa los ntawm:

Rau M8 hex qhov (socket head cap screws), zinc txheej thickness yog tswj ntawm 40-50 microns, thiab nyob rau hauv txoj cai, yuav tsum tsis txhob ntau tshaj 50 microns;

Rau hex socket taub hau hau screws ntawm M20 thiab saum toj no specifications, zinc txheej thickness yuav tswj tau ntawm 60-70 microns. Thaum ua tau raws li qhov yuav tsum tau muaj kev tiv thaiv corrosion, nws ua kom qhov kev sib txuam ntawm cov cuab yeej txhim kho.

Rau kub-dip galvanized bolts, ntxiv rau qhov tuab, qhov ntom ntom ntawm zinc txheej yog qhov tseem ceeb los xyuas kom meej adhesion. Yog tias qhov adhesion tsis zoo, thaum lub zinc txheej puas lawm, lub bolt substrate tau yooj yim raug, tsim cov ntsiab lus corrosion, uas yuav cuam tshuam rau corrosion kuj stability ntawm kub -dip galvanized bolts. Kub-dip galvanized bolts yooj yim rau kev tsim thiab tuaj yeem xa tawm ntau, ntsib cov neeg siv khoom ntau qhov xav tau yam tsis muaj kev xa khoom qeeb. Txawm li cas los xij, vim cov txheej txheem kuj yooj yim ntawmkub-dip galvanized bolts, tau muaj ib qho teeb meem ntawm qhov chaw qis. Qee lub bolts tuaj yeem muaj qhov chaw rov ua dua. Qhov tshwm sim no feem ntau yog tshwm sim los ntawm qhov sib txawv ntawm lub sij hawm pickling tswj cov khoom siv ntsia liaj qhov rooj (pickling lub sij hawm ncaj qha cuam tshuam rau lub uniformity ntawm zinc kua adhesion), thiab kub siab kuj yuav ua rau lub ntsia liaj qhov rooj nto tshwm grey. Txawm li cas los xij, xws li qhov tshwm sim saum npoo yuav tsis cuam tshuam rau xeb tiv thaiv. Yog li ntawd, cov neeg siv ntawm kub -dip galvanized bolts tsis tas yuav tsum overemphasize saum npoo tiav. Tsuav yog tsis muaj delamination dawb rau saum npoo ntawm kub -dip galvanized bolts, tsis muaj teeb meem zoo thiab lawv tuaj yeem siv nrog kev ntseeg siab.