Corrosion- tiv thaiv txheej txheej technology thiab yoog mus rau ib puag ncig hnyav rau kev tsheb ciav hlau bolts
Dab tsi yog cov txheej txheem tseem ceeb rau cov kub -dip galvanizing txheej ntawm lub teb chaws tus qauv khiav bolts?
zinc txheej thickness ntawm kub-dip galvanizing txheej ntawm lub teb chaws tus qauv khiav bolts yuav tsum tau tswj ntawm 85-120μm. Cov thickness tsis txaus yuav txo qhov muaj peev xwm los tiv thaiv corrosion, thaum lub thickness ntau dhau yuav ua rau zinc txheej txheej. Ua ntej galvanizing, cov bolts yuav tsum tau muab ntxuav kom huv si thiab derusted, thiab qhov roughness ntawm qhov chaw yuav tsum ncav cuag Ra12.5μm kom ntseeg tau tias lub zog sib txuas ntawm zinc txheej thiab cov substrate. Lub galvanizing kub yuav tsum ruaj khov ntawm 440-460 degree, thiab lub sij hawm galvanizing yuav tsum tau tswj ntawm 1-3 feeb kom tsis txhob coarse zinc txheej nplej los ntawm qhov kub thiab txias los yog lub sij hawm. Tom qab galvanizing, passivation kev kho mob yuav tsum tau tsim ib tug passivation zaj duab xis rau ntawm zinc txheej nto thiab txhim kho cov kuj mus rau dawb xeb. Tsis tas li ntawd, cov txheej txheej adhesion yuav tsum tau kuaj xyuas los ntawm kev sim khoov, thiab cov zinc txheej yuav tsum tsis txhob tev lossis tawg tom qab khoov 180 degree.
Dab tsi yog qhov zoo tiv thaiv-corrosion zoo ntawm txawv teb chaws tus qauv Dacromet txheej piv nrog kub-dip galvanizing?
Kev tiv thaiv-kev ua haujlwm corrosion ntawm Dacromet txheej yog 5-8 npaug ntawm kub-dip galvanizing. Nws tuaj yeem tiv taus ntau tshaj 1000 teev ntawm kev ntsuas ntsev tsuag yam tsis muaj xeb liab, deb tshaj li 500- teev tus qauv kub-dip galvanizing. Cov txheej txheej yog zinc{11}} txheej txheej aluminium, uas muaj ob txoj haujlwm ntawm kev tiv thaiv cathodic thiab tiv thaiv kev tiv thaiv, thiab tuaj yeem tsim cov yeeb yaj kiab tiv thaiv ntom ntom ntawm qhov ntsia liaj qhov rooj. Dacromet txheej tau zoo heev - qhov kub thiab txias tsis kam thiab tuaj yeem tiv thaiv kev ua haujlwm corrosion ntawm 300 degree, thaum kub-dip galvanizing yog feem ntau zinc txheej softening saum 100℃. Cov txheej yog ntau tus phooj ywg ib puag ncig, tsis muaj cyanide lossis hnyav hlau ua kuab paug hauv cov txheej txheem tsim khoom, ua tau raws li European thiab Asmeskas cov qauv ib puag ncig. Tsis tas li ntawd, Dacromet txheej muaj qhov zoo sib xws, tuaj yeem npog cov txheej txheem nyuaj xws li bolt threads, thiab muab kev tiv thaiv tsis pub tuag.
Dab tsi yog cov txheej txheem xaiv cov ntsiab lus rau cov bolts hauv ntug dej hiav txwv ntsev tsuag?
Hauv thaj chaw ntsev ntsev ntawm ntug dej hiav txwv, siab -corrosion- cov coatings resistant yuav tsum tau xaiv, thiab kev sib xyaw ntawm Dacromet + sealing txheej yog nyiam. Cov txheej sealing tuaj yeem cais cov tshuaj ntsev ntxiv nkag mus. Cov txheej tuab yuav tsum tau nce mus rau ntau tshaj 150μm txhawm rau txhim kho qhov muaj peev xwm tiv thaiv hauv thaj chaw ntsev ntsev. Cov xov ib feem ntawm lub bolt xav tau kev kho gluing ntxiv los txhim kho kev tiv thaiv -loosing kev ua tau zoo thaum tiv thaiv corrosion. Kev ntsuas tshuaj tiv thaiv ntsev ntawm cov txheej txheem yuav tsum ua kom tau raws li qhov yuav tsum tau ua kom tsis muaj xeb rau ntau tshaj 1500 teev kom hloov mus rau qhov siab - corrosion ua hauj lwm tej yam kev mob nyob rau hauv ntug hiav txwv dej. Tsis tas li ntawd, ib qho kev tiv thaiv -loosing qauv sib haum nrog cov txheej yuav tsum raug xaiv kom tsis txhob muaj kev puas tsuaj rau txheej txheej los ntawm kev tiv thaiv-loosing Cheebtsam.
Dab tsi yog qhov tshwj xeeb uas yuav tsum tau ua rau kev taug qab bolt txheej hauv thaj tsam alpine permafrost?
Lub ntsia liaj qhov rooj txheej hauv thaj tsam alpine permafrost yuav tsum muaj tsawg - qhov kub thiab txias tsis kam, thiab cov txheej yuav tsum tsis txhob nkig lossis poob ntawm -50℃qis. Cov txheej yuav tsum muaj qhov hloov tau zoo, tuaj yeem hloov mus rau me ntsis deformation ntawm bolts tshwm sim los ntawm permafrost khov -thaw voj voog, thiab tsis muaj txheej txheej tawg tshwm sim. Cov txheej txheem txheej txheej uas muaj zog qis- qhov kub thiab txias yuav tsum tau xaiv kom tsis txhob tev ntawm cov txheej thiab cov substrate vim qhov kub thiab txias hloov tam sim ntawd. Cov txheej yuav tsum muaj khov -thaw tsis kam thiab tuaj yeem tswj tau los tiv thaiv-corrosion nyhuv tom qab ntau tshaj 50 khov-thaw mus. Tsis tas li ntawd, txheej txheej yuav tsum tau kho nrog hydrophobic anti-icing los tiv thaiv txheej khov thiab tawg los ntawm dej khov thiab daus adhesion.
Yuav ua li cas txhawm rau txhawm rau txhawm rau tiv thaiv - kev ua haujlwm corrosion ntawm cov ntsia hlau txheej ua tau raws li tus qauv?
Cov txheej txheej corrosion tuaj yeem raug kuaj los ntawm nruab nrab ntsev tsuag tshuaj ntsuam raws li GB / T 10125 tus qauv. Yog tias tsis muaj xeb liab nyob rau lub sijhawm teev tseg, nws raug txiav txim tias tsim nyog. Lub adhesion tester yog siv los kuaj xyuas cov txheej txheem sib txuas, thiab qhov kev sib txuas ntawm qhov rub tawm - txoj kev tawm yuav tsum siab dua lossis sib npaug li 5MPa. Kev ntsuas siab siab - qhov ntsuas kub qis yog siv los simulate huab cua huab cua, thiab cov txheej txheem raug soj ntsuam rau blistering thiab tawg tom qab kuaj. Ib txheej txheej thickness gauge yog siv los pom - xyuas cov txheej tuab kom ntseeg tau tias cov tuab tuab thiab ua raws li cov qauv tsim. Tsis tas li ntawd, ntawm -qhov chaw daim coupon xeem tuaj yeem ua tiav, thiab cov bolts coated tau muab tso rau hauv cov haujlwm tiag tiag kom tsis tu ncua soj ntsuam kev xeb thiab txheeb xyuas qhov ntev -lub sij hawm tiv thaiv- muaj peev xwm corrosion.