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Dacromet Flange Bolts: Kev Taw Qhia Txog Kev Ua Haujlwm Zoo Los Tiv Thaiv Corrosion Fasteners
2026-09-21 : kuv
1. Taw qhia rau Flange Bolts thiab Anti-Corrosion Requirements
Flange bolts yog qhov tseem ceeb fasteners siv dav hauv cov kav dej, cov hlab ntsha siab, kev sib txuas ntawm cov hlau, tsheb sib dhos, kev teeb tsa hluav taws xob, cov nroj tsuag petrochemical, thiab cov khoom siv hnyav. Cov bolts tshwj xeeb no ua kom muaj kev ruaj ntseg, tawg-pov thawj pob qij txha ntawm flanges nyob rau hauv siab siab thiab cov khoom siv thauj khoom. Txawm li cas los xij, nyob rau hauv lub ntiaj teb kev pab cuam tiag tiag uas muaj cov dej noo, tshuaj tsuag ntsev, tshuaj lom neeg, cov av noo siab, los yog cov ntug hiav txwv dej, cov hlau zoo tib yam muaj qhov cuam tshuam rau corrosion thiab xeb. Progressive oxidation txo cov clamping quab yuam, ua rau kev sib koom ua ke, ua rau lub cev tsis muaj zog, thiab ua rau tsis muaj nqi ua ntej.
Txhawm rau daws cov teeb meem no, kev lag luam niaj hnub tso siab rau cov thev naus laus zis tiv thaiv saum npoo. Ntawm cov kev daws teeb meem zoo tshaj plaws yog Dacromet (tseem hu ua Dacomet lossis zinc-aluminium flake txheej). Dacromet-coated flange bolts muab qhov zoo tshaj plaws corrosion kuj, tshwj xeeb anti-xeb kev ua tau zoo, thiab lub sijhawm ntev tiv thaiv xeb. Kab lus no qhia txog Dacromet flange bolts hauv kev nthuav dav, npog qhov sib xyaw, kev ua tau zoo, cov yam ntxwv, thiab daim ntawv thov tus nqi hauv kev xav tau. anti-corrosion ib puag ncig.
2. Dacromet Txheej yog dab tsi?
Dacromet yog ib qho kev ua tau zoo zinc-aluminium flake txheej txheej txheem tsim los ua lwm txoj hauv kev rau cov tsoos electroplating thiab kub-dip galvanizing. Cov txheej txheej muaj cov txheej txheej txheej ntawm zinc thiab txhuas flakes raug tshem tawm hauv ib qho khoom siv tsis zoo. Tom qab daim ntawv thov los ntawm dip-spin, tshuaj tsuag, los yog dip-drain txoj kev thiab high-temperature curing, cov flakes tsim ib tug ntom, multi-layered barrier uas muab ntau yam mechanisms. anti-corrosion kev tiv thaiv.
Tsis zoo li cov pa zinc plating uas tso siab rau ib txheej txheej hlau txuas ntxiv, cov qauv lamellar ntawm zinc thiab txhuas flakes tsim ib txoj hauv kev nyuaj uas ua rau qeeb nkag ntawm dej, oxygen, thiab chloride ions. Qhov tshwj xeeb microstructure no tsim lub hauv paus ntawm txheej txheej zoo dua corrosion kuj thiab kav ntev tiv thaiv xeb muaj peev xwm. Hom Dacromet txheej tuab yog li ntawm 5 txog 12 micrometers (μm). Txawm hais tias nws cov ntawv nyias nyias, cov txheej Dacromet siv tau zoo tuaj yeem ua tiav cov tshuaj tsuag ntsev ntau tshaj 1,000 teev - thiab feem ntau tshaj 2,000 teev - tsis muaj xeb liab. Qhov no theem ntawm anti-xeb kev ua tau zoo nyob deb tshaj li cov txheej txheem electro-galvanized thiab feem ntau ua haujlwm kub-dip galvanizing hauv cyclic thiab ntev raug kuaj.
3. Qhov tseem ceeb ntawm Dacromet Flange Bolts
Dacromet flange bolts muab cov neeg kho tshuab kev ntseeg siab nrog superior anti-corrosion durability, ua rau lawv zoo tagnrho rau high-lub zog thiab tseem ceeb fastening daim ntaub ntawv.
3.1 Zoo Corrosion Resistance thiab Anti-xeb Performance
Qhov laj thawj tseem ceeb rau xaiv Dacromet-coated flange bolts yog lawv qhov tshwj xeeb corrosion kuj. Kev ntsuam xyuas ntsev ntsev ywj siab (ASTM B117 / ISO 9227) tsis tu ncua qhia tias Dacromet txheej tiv taus 1,000 txog 2,000 teev lossis ntau dua ua ntej xeb liab tshwm. Kev ntsuam xyuas sib piv qhia tau tias Dacromet feem ntau muab 3 txog 10 npaug zoo dua anti-xeb kev ua tau zoo dua li txheej txheem zinc electroplating. Qhov no superior tiv thaiv xeb muaj peev xwm txhais tau rau hauv kev pab cuam lub neej ntev heev rau kev sib txuas ntawm flange raug cuam tshuam rau ib puag ncig hnyav xws li ntug hiav txwv dej, dej hiav txwv, thiab chaw ua haujlwm.
3.2 Tsis muaj kev pheej hmoo ntawm Hydrogen embrittlement
High-strength flange bolts (qib 8.8, 10.9, 12.9 thiab ASTM A490 / F3125 structural bolts) tshwj xeeb tshaj yog rau hydrogen embrittlement. Kev lig kev cai electroplating suav nrog acidic pickling thiab electrolytic deposition uas tuaj yeem qhia hydrogen rau hauv cov hlau, uas yuav ua rau ncua sij hawm tawg. Dacromet yog cov txheej txheem tsis-electrolytic uas zam qhov kev pheej hmoo no, ua rau Dacromet-kho bolts nyiam. anti-corrosion daws rau high-tensile flange bolts.
3.3 Txheej txheej nrog cov xov zoo sib xws
Nrog lub thickness ntawm tsuas yog 5-12 μm, Dacromet zaj duab xis tsis cuam tshuam cov xov qhov ntev los yog cuam tshuam nrog cov txiv ntoo. Hauv qhov sib piv, kub-dip galvanizing feem ntau ua rau tuab, tsis sib xws txheej uas sau cov xov thiab xav tau cov txiv ntoo loj. Yog li ntawd, Dacromet flange bolts tuaj yeem sib sau ua ke nrog cov txheej txheem ceev thaum tseem xa cov khoom zoo corrosion kuj thiab anti-xeb kev tiv thaiv.
3.4 Kev kub siab ruaj khov thiab kev tiv thaiv ntau yam
Dacromet coatings tuav lawv anti-corrosion Kev ncaj ncees ntawm qhov kub siab (feem ntau txog 250-300 ° C), uas yog qhov tseem ceeb rau flange bolts ze ntawm lub cav, lub tshuab tso pa, lossis cov qauv sab nraum zoov. Lub txheej muab plaub ntxiv tiv thaiv xeb mechanisms: (1) Barrier tiv thaiv los ntawm overlapping zinc-aluminium flakes; (2) Galvanic sacrificial tiv thaiv los ntawm zinc; (3) Kev kho tus kheej los ntawm oxide txhaws ntawm kev puas tsuaj me; thiab (4) Passivation los ntawm inorganic binder uas retards ntxiv corrosion.
4. Cov ntawv thov ntawm Dacromet Flange Bolts
Nrog rau lawv qhov zoo tshaj plaws anti-corrosion thiab anti-xeb Cov khoom, Dacromet flange bolts yog dav teev nyob rau hauv kev lag luam uas yuav tsum tau muaj kev cia siab ntev nyob rau hauv corrosive tej yam kev mob:
- Offshore thiab coastal structures: Cua turbine yees, offshore platforms, ntug dej hiav txwv txuas hniav, thiab chaw nres nkoj tau txais txiaj ntsig los ntawm cov tshuaj ntsev zoo tshaj corrosion kuj.
- Automotive thiab kev thauj mus los: Chassis, ncua kev kawm ntawv, tso pa tawm, thiab hauv qab lub cev fasteners yuav tsum txhim khu kev qha tiv thaiv xebtiv thaiv txoj kev ntsev thiab av noo.
- Petrochemical thiab chemical processing: Pipeline thiab reactor flange kev sib txuas ntsib kev raug tshuaj lom neeg tsis tu ncua; Dacromet muab kev ruaj khov anti-corrosion
- Kev tsim hluav taws xob thiab kev xa mus: Kev xa tawm ntauwd bolts thiab cov khoom siv hluav taws xob cog cia siab rau Dacromet's anti-xebkev ua tau zoo nyob rau hauv ib puag ncig sab nraum zoov.
- Heavy machinery, kev ua liaj ua teb, thiab kev tsim kho: Cov cuab yeej ua haujlwm hauv cov av ntub dej, chiv, lossis cov huab cua hauv hiav txwv nyob ntawm Dacromet's corrosion kujthiab mus ntev tiv thaiv xeb.
5. Summary of Benefits and Conclusion
Xaiv Dacromet-coated flange bolts coj ntau yam zoo:
- Ua tau zoo lawm corrosion kujthiab anti-xeb kev ua tau zoo piv nrog cov pa zinc txheej.
- Kev tu ncua ntev dua thiab txo tus nqi lifecycle vim txuas ntxiv tiv thaiv xeb.
- Kev nyab xeeb daim ntawv thov ntawm lub zog siab bolts yam tsis muaj hydrogen embrittlement txaus ntshai.
- Preservation ntawm leej xov geometry rau txhim khu kev qha sib dhos thiab reusability.
- Kev ua tau zoo heev hauv cov ntsev-laden, av noo, tshuaj lom neeg, thiab kub-kub ib puag ncig.
Hauv kev xaus, Dacromet flange bolts sawv cev rau kev paub tab, kev ua haujlwm siab rau cov kws tshaj lij thiab cov kws kho mob uas xav tau ob qho tib si kev ntseeg siab thiab zoo dua. anti-corrosion kev tiv thaiv. Los ntawm kev sib xyaw ua ke ntawm kev tiv thaiv kev tiv thaiv, kev txi zinc ua, tus cwj pwm kho tus kheej, thiab inorganic passivation, Dacromet coatings xa tshwj xeeb corrosion kuj, zoo heev anti-xeb muaj peev xwm, thiab mus sij hawm ntev tiv thaiv xeb. Txawm hais tias siv nyob rau hauv ntug dej hiav txwv cua turbines, ntug hiav txwv infrastructure, automotive chassis, petrochemical nroj tsuag, los yog hnyav industrial cov khoom, Dacromet-coated flange bolts tsis tu ncua outperform ib txwm nto kho mob nyob rau hauv durability thiab kev cia siab.
Rau qhov tseem ceeb flange kev sib txuas raug rau cov kev pabcuam corrosive, qhia meej txog Dacromet flange bolts yog qhov kev txiav txim siab zoo uas txhim kho kev nyab xeeb, txo cov nqi ntawm lub neej, thiab ua kom muaj kev ntseeg ruaj khov los ntawm kev ua haujlwm zoo. corrosion kuj thiab ntseeg tau tiv thaiv xeb.
