Dacromet Hex Bolts Ua Cov Nkoj Tom ntej ntawm Anti-Corrosion Fastening 

Tsis zoo li ib txwm electroplated zinc, cov txheej txheem Dacromet qhia tsis muaj hydrogen rau hauv substrate. Qhov no tshem tawm qhov kev pheej hmoo ntawm hydrogen embrittlement - qhov tseem ceeb kom zoo dua thaum txheej siab zog hex bolts ntawm qib 8.8, 10.9, thiab 12.9. Qhov tshwm sim yog a xeb-pov thawj hex bolt uas khaws tag nrho cov neeg kho tshuab kev ncaj ncees thaum muab kev tiv thaiv corrosion zoo tshaj rau cov pa ua tiav.

Vim li cas Hex Bolts tau txais txiaj ntsig ntau los ntawm Dacromet

Hex bolts-tshwj xeeb yog hnyav hex qauv bolts - yog dav teev nyob rau hauv txuas hniav, cua-zog yees, hnyav machinery, thiab tsheb chassis. Cov ntawv thov no xav tau cov fasteners uas sib xyaw ua ke tus cwj pwm torque-tension nrog ntau xyoo-ntev anti-corrosion lub neej. Dacromet ua tau raws li ob qho kev cai:

• Uniform kev pab them nqinyob rau hauv txoj xov geometry yam tsis muaj kev txhim kho nrog kub-dip galvanizing, khaws cia qhov tseeb qhov tseeb thiab xov haum.
• Tswj coefficient ntawm kev sib txhuam(feem ntau μ = 0.12–0.18 nrog topcoat), ua kom muaj qhov sib npaug ntawm qhov sib npaug thiab kev ua haujlwm ntau nruj.
• Tsis muaj hydrogen embrittlement txaus ntshai, ua Dacromet qhov nyiam anti-xebtag rau high-tensile hex bolts siv nyob rau hauv kev ruaj ntseg-tseem ceeb pob qij txha.
• Kub tiv taus mus txog 300 ° C, deb tshaj qhov kev txwv ntawm electroplated zinc.

Corrosion Performance: Dacromet vs. Traditional Coatings

Kev soj ntsuam ywj pheej tsis tu ncua qhia tau tias Dacromet-coated hex bolts Ua tau zoo dua ob qho tib si electroplated zinc thiab kub-dip galvanized fasteners nyob rau hauv nruab nrab ntsev-txhaj tshuaj (ASTM B117 / ISO 9227) thiab cyclic corrosion tests. Cov kev sib piv hauv qab no qhia txog cov txiaj ntsig zoo rau cov txheej txheem sib npaug:

Table 1. Kev sib piv kev ua tau zoo ntawm cov txheej txheem loj los tiv thaiv corrosion rau hex bolts (ib txwm kuaj qhov tseem ceeb).

Hauv ib qho kev qhia dav dav txog kev tsim nyog rau ASTM A490 high-strength structural bolts, Dacromet-coated qhov chaw qhia xoom liab Tom qab 1,000 xuab moos ntawm kev siv ntsev-txheej txuas ntxiv, thaum cov khoom siv galvanized bolts nthuav tawm ntau dua 85% liab xeb ntawm qhov chaw tseem ceeb. Txawm tias tom qab 5,000 teev, Dacromet cov qauv tso tawm tsuas yog li 6% liab xeb-ua tau zoo tshaj qhov kub-dip galvanized counterparts uas mus txog ze-tag nrho cov nto corrosion.

Kev Tshawb Fawb Tom Qab Superior Anti-xeb tiv thaiv

Qhov tshwj xeeb anti-corrosion Kev ua tau zoo ntawm Dacromet tshwm sim los ntawm peb lub tswv yim ntxiv:

1. Barrier tiv thaiv- Overlapping zinc thiab aluminium flakes tsim ib txheej tuab, ntau txheej thaiv uas cuam tshuam cov dej noo thiab chloride ion nkag mus.
2. Sacrificial (cathodic) tiv thaiv- Zinc flakes nyiam corrode, tiv thaiv cov hlau hauv qab txawm tias cov txheej hauv zos puas.
3. Passivation / kho tus kheej- Chromium-oxide tebchaw nyob rau hauv lub binder tsim ib tug ruaj khov passive zaj duab xis uas ntxiv slows corrosion.

Kev Lag Luam Outlook thiab Kev Lag Luam cuam tshuam

Raws li kev lag luam thoob ntiaj teb kev lag luam nrawm nrawm thiab tsheb platforms tsiv mus rau cov hlau muaj zog dua, thov kom ntseeg tau. anti-corrosion thiab xeb-pov thawj fastener daws txuas ntxiv nce. Cov neeg soj ntsuam kev lag luam sau tseg ntau qhov kev txhawb nqa ntxiv:

• Specification loj hlob- Ntau cov qauv kev tsim vaj tsev (nrog rau cov kev hloov kho tshiab ntsig txog ASTM F3125 cov qauv bolts) tam sim no qhia meej meej txog cov tshuab zinc-flake xws li Dacromet raws li kev siv tau rau cov tsoos galvanizing rau kev siv zog siab.
• Sustainability xav txog- Cov txheej txheem Dacromet ua dej ua kom muaj kev phom sij tsawg dua li ntau cov kab electroplating, ua raws cov kev cai nruj ib puag ncig.
• Tag nrho cov nqi ntawm cov tswv cuab- Txawm hais tias chav tsev tus nqi yuav siab dua qhov yooj yim zinc plating, lub neej ntev kev pab cuam thiab txo kev saib xyuas ntawm Dacromet hex bolts nquag xa cov nqi qis dua lub neej nyob rau hauv ib puag ncig corrosive.

Kev taw qhia tswv yim rau Specifiers

Thaum xaiv Dacromet-coated hex bolts, engineers yuav tsum txheeb xyuas cov qib txheej (piv txwv li, Qib A lossis B raws li qhov hnyav ntawm txheej), paub meej tias kev sib raug zoo ntawm cov roj pleev xim pleev xim nrog lub hom phiaj kev sib raug zoo, thiab xyuas kom meej tias ob qho tib si bolts thiab cov txiv ntseej / ntxhua khaub ncaws tau txais kev sib tw tiav. Kev khaws cia thiab tuav kom zoo tseem ceeb heev: thaum txheej txheej yog heev anti-xeb, mechanical puas tsuaj ua ntej kev teeb tsa tuaj yeem txo kev tiv thaiv hauv zos.

Xaus

Dacromet thev naus laus zis tau loj hlob los ntawm cov tsheb tshwj xeeb ua tiav rau hauv lub ntsiab anti-corrosion kev daws teeb meem rau kev ua haujlwm siab hex bolts. Nws qhov tshwj xeeb ua ke ntawm nyias-zaj duab xis uniformity, tsis muaj hydrogen embrittlement, siab kub muaj peev xwm, thiab muaj pov thawj ntau txhiab-teev ntsev-txhaj tshuaj tiv thaiv txoj haujlwm nws yog ib qho kev xaiv nyob rau txhua qhov chaw mus sij hawm ntev. xeb-pov thawj kev ntseeg yog tsis-negotiable.

Raws li cov tswv vaj tse, cov neeg tsim khoom cua-ua liaj ua teb, thiab cov tsheb OEMs txuas ntxiv saib xyuas qhov tseem ceeb ntawm kev ua haujlwm ntev thiab txo kev saib xyuas, Dacromet hex bolts cia siab tias yuav ntes ib qho kev nthuav dav ntawm cov khoom lag luam zoo tshaj plaws - xa cov anti-xeb kev ua tau zoo uas niaj hnub engineering xav tau.