Nyob rau hauv lub tshav pob kev tsim, kev kho mob corrosion corrosion ntawm cov hlau thiab alloy steel seem yog qhov txuas tseem ceeb kom ntseeg tau cov kev pabcuam kev ua haujlwm. Ntxiv nrog rau cov txheej txheem pleev xim, cov kev kho mob sib txawv tam sim no suav nrog kev sib daj sib deev, zinc infiltration), dacromet thiab cov hlau hluav taws xob electroplating. Muaj ntau qhov sib txawv hauv kev tiv thaiv corrosion corrosion, tus nqi tau zoo thiab daim ntawv thov ntawm txhua tus txheej txheem. Tam sim no txoj kev tsom xam cov yam ntxwv ntawm lawv cov yam ntxwv kev paub yog nqa tawm.
Txheej Txheem Tiv Thaiv Kev Tiv Thaiv
Kev Kho Dub Dub
Cov yeeb yaj kiab FE3O4 yog tsim tawm ntawm cov hlau saum npoo los ntawm kev tshuaj lom neeg oxidation, thiab corrosion tsis kam ntawm nruab nrab ntawm ntsev tsuag kev tshuaj ntsuam (NSS) yog {2}} teev. Tom qab kho, tiv thaiv cov roj xeb yuav tsum tau thov, thiab kev ncaj ncees ntawm cov yeeb yaj kiab roj ncaj qha cuam tshuam rau cov kev tiv thaiv kev tiv thaiv. Cov txheej txheem no yog tus nqi qis thiab haum rau kev tiv thaiv luv luv ntawm cov tsis yog hom phiaj.
Phosphating Kev Kho Mob
Ib qho phosphate hloov zaj duab xis nrog lub microporousry cov qauv siv, thiab cov kev tiv thaiv NSS tiv thaiv nss yog}}} teev. Nrog kev tiv thaiv cov roj xeb (tus nqi yog 2-3 lub sij hawm uas ntawm cov roj zoo tib yam), nws tuaj yeem txuas ntxiv rau {}} teev. Raws li kev ua yeeb yaj kiab zaj duab xis, nws tuaj yeem faib ua:
Zinc phosphating: rab koob-puab / flaky crystal qauv, feem ntau yog siv rau cov kev kho mob ntawm kev kho lubrication
Manganese phospating: Spherical Quaj Crystal, Cov yeeb yaj kiab zoo heev (qhuav}. {}}. 15), tab sis cov txheej nplaum tsis zoo
Kev sib piv ntawm cov tshuab galvanizing
Electrogalvanizing
Ib qho 5-25 μm zinc Zinc Zov yog tsim los ntawm kev siv hluav taws xob, thiab lub sijhawm NSS lub sijhawm tsawg dua lossis muaj sib npaug rau 72 teev. Kev siv ntawm cov organic ferbalant kev kho (them nqi nce 5-8} lub sij hawm) tuaj yeem nce mus rau ntau tshaj 200 teev. Cov xim yuav tsum tau them rau qhov kev pheej hmoo ntawm hydrogen embrittlement (seem nrog tensile lub zog ntau dua los yog sib npaug zos yuav tsum tau dehydogenated ntawm {}} degree × 8h).
Kub-DIP Galvanizing
{50-200} μm alloy txheej yog tsim nyob rau hauv 450 degree molten zinc, thiab cov nss kev ua tau zoo dua electrogalvanizing. Txawm li cas los xij, muaj cov teeb meem xws li Zinc Slag Vice Thickness
Zinc Infiltration Txheej Txheem
Lub ZN-FE Alloy Txheej yog npaj los ntawm thermal diffusion tshuab ({1}} degree), uas muaj cov txiaj ntsig hauv qab no:
Binding strength>30MPA (3 lub sij hawm siab dua electroplating)
Txheej Txheej Txheej Txheem Ua Yuam Kev<±5μm
Tsis muaj cov khib nyiab tso kua dej, ua raws li cov ROHS cov lus qhia
Txheej Txheem Tiv Thaiv Tshwj Xeeb
Dacromet Txheej
Nws yog tsim ntawm zinc-shau ntawv (particle loj {1}} μm), chromegnation-txheej txheem yog siv los ua}} μm inorganic zaj duab xis. Cov corrosion tsis kam yog 7-10 lub sij hawm uas ntawm electroplating ntawm cov tuab tuab (10. 9-12. 9 qib).
Yam Ntxawm Hlau Electropating
Cadmium plating: NSS>500h nyob rau hauv marine huab cua, tab sis tus nqi ntawm kev kho dej kom huv yog 15-20 lub sij hawm uas ntawm electrogalvanizing,Mas siv rau hauv cov khoom siv nkoj
Chromium plating: surface hardness 800-1000HV, temperature resistance 650℃, copper/nickel primer required (total thickness ≥30μm), decorative>povhwm
Nickel plating: NSS>200h hauv nruab puag ncig nruab nrab, feem ntau siv los ua cov txheej nruab nrab ntawm cov composite plating
Cov Txheej Txheem Xaiv Cov Ntsiab Cai
Nws raug nquahu kom xaiv raws li GB / t 10125-2021} ntsev txau txheem txheem, sib xyaw nrog cov hauv qab no:
Kev Pabcuam: Kev nyab xeeb cua / Marine Kev nyab xeeb nyab xeeb / Tshuaj Corrosion
NEEG KHO TSHUAB TEJ: Hydrogen embrittlement rhiab / Hnav Kuj Xav Tau
Kev lag luam efficiency: Kev kho tus nqi tsim tsim lub neej sib piv
Kev tiv thaiv ib puag ncig ib puag ncig: khib nyiab thiab tso pa roj emission
Txoj kev txhim kho kev loj hlob tam sim no qhia txog qhov chromium-dawb dacromet (PVD) thev naus laus zis tau hloov cov txheej txheem ua paug. Nws raug nquahu kom muab qhov tseem ceeb rau ib puag ncig cov kev kho mob nyob ib puag ncig hauv kev tsim cov cuab yeej siv tshiab.(来源: Imchanics 机械)
