Dacromet Hexagonal Bolts-Ib qho Kev Taw Qhia rau Kev Ua Haujlwm Siab Corrosion-Resistant Fasteners 

2. Dacromet Txheej yog dab tsi?

Dacromet yog ib qho txheej txheem inorganic tsim los ntawm ultra-fine zinc flakes, txhuas hmoov, thiab chromium-raws li (lossis chromium-free) binder. Siv raws li dej-raws li dispersion thiab kho ntawm kwv yees li 300 ° C, nws tsim ib tug amorphous binder uas interlocks overlapping hlau flakes rau hauv ib tug compact tiv thaiv zaj duab xis. Cov txheej txheej tuab tsuas yog 4-8 μm - deb dua li kub-dip galvanizing (50-80 μm) - tsis tau nws muab kev tiv thaiv corrosion zoo dua. Qhov saum npoo tiav lawm muaj ib qho nyiaj-grey xim hlau zoo li.

Core muaj pes tsawg leeg: zinc flakes (60-80%) rau kev tiv thaiv kev txi, txhuas hmoov (5-15%) rau kev txhim kho cov khoom thaiv kev tiv thaiv, ib qho inorganic binder uas passivates saum npoo, thiab deionized dej raws li cov khoom nruab nrab.

3. Qhov tseem ceeb ntawm Dacromet Hexagonal Bolts

3.1 Exceptional Corrosion Resistance

A 4-8 μm Dacromet txheej feem ntau tiv taus ntau dua 1,000-1,200 teev ntawm kev ntsuas nruab nrab ntsev (ASTM B117) yam tsis muaj xeb liab - kwv yees li 7 mus rau 10 npaug ntawm kev ua haujlwm ntawm electro-galvanizing (100-300 teev). Cov qib kev ua tau zoo tuaj yeem tshaj 2,000 teev. Cov txheej txheem ntau txheej flake ua raws li ob qho tib si lub cev tsis sib haum xeeb thiab kev txi anode, muab kev tiv thaiv mus sij hawm ntev hauv ntug dej hiav txwv, kev lag luam, thiab txoj kev ntsev ib puag ncig.

3.2 Kev ywj pheej los ntawm Hydrogen Embrittlement

Kev lig kev cai electroplating suav nrog acid pickling thiab electrolysis, uas tuaj yeem qhia hydrogen rau hauv cov hlau uas muaj zog thiab ua rau ncua sij hawm tawg-tshwj xeeb yog qhov tseem ceeb rau Qib 10.9 thiab 12.9 bolts. Cov txheej txheem Dacromet tsuas yog siv cov khoom siv tu thiab tsis siv hluav taws xob, tshem tawm cov kev pheej hmoo ntawm hydrogen embrittlement. Qhov no ua rau nws nyiam txheej txheej rau kev nyab xeeb-tseem ceeb heev-tensile hexagonal bolts.

3.3 Qhov Zoo Tshaj Kub Kub Kub

Dacromet coatings nyob ruaj khov thiab tiv thaiv ntawm qhov kub thiab txias mus txog 300 ° C. Cov txheej txheem zinc txheej pib degrade saum 70-100 ° C thiab tuaj yeem tev ntawm 200-300 ° C. Qhov kev ruaj ntseg thermal no ua rau Dacromet hexagonal bolts zoo tagnrho rau cov cav tov, cov tshuab tso pa, thiab cov chaw ua haujlwm kub.

3.4 Dimensional Stability thiab Thread Compatibility

Lub ultra-thin, conformal txheej tsis cuam tshuam cov xov qhov ntev lossis lub suab txoj kab uas hla. Cov txiv ntseej sib sau ua ke zoo yam tsis muaj qhov loj tapping feem ntau xav tau tom qab kub-dip galvanizing. Cov txheej kuj nkag mus rau hauv qhov tob, qhov chaw, thiab cov chaw sab hauv uas electroplating tsis tuaj yeem tiv thaiv tau. Tsis tas li ntawd, zaj duab xis bonds khov kho rau lub substrate thiab lees txais cov organic coatings tom qab los yog pleev xim nrog zoo adhesion.

4. Kev tsim khoom thiab txheej txheej

Hexagonal bolts feem ntau yog tsim los ntawm nruab nrab-carbon lossis alloy steel los ntawm lub taub hau txias lossis kub forging, ua raws li cov xov dov thiab kev kho cua sov kom ua tiav cov cuab yeej tsim nyog (feem ntau 8.8, 10.9, lossis 12.9). Tom qab ntxuav tag, Dacromet txheej yog siv raws li hauv qab no:

1. Kev npaj deg: Alkaline degreasing thiab mechanical abrasive tu (tsis muaj acid pickling).

2.Coating daim ntawv thov: Dip-spin immersion rau bulk fasteners lossis txau rau qhov loj; Tshaj txheej tshem tawm los ntawm centrifugation.

3. Kev kho: Ci ntawm kwv yees li 300-320 ° C rau 15-30 feeb los tsim cov qauv tiv thaiv flake.

4.Optional topcoat: Lub sealer lossis lubricant tuaj yeem siv los txhim kho corrosion thiab tswj cov coefficient ntawm kev sib txhuam.

5. Cov ntawv thov ib txwm

Dacromet hexagonal bolts yog dav teev nyob rau hauv lub sij hawm ntev kev cia siab nyob rau hauv corrosive los yog high-temperature tej yam kev mob yog qhov tseem ceeb:

Automotive: Chassis, ncua kev kawm ntawv, nres systems, cav compartment hardware, thiab underbody seem raug rau txoj kev ntsev.

Cua zog & fais fab kis: Ntauwd bolts thiab structural fasteners ntawm offshore thiab ntug hiav txwv cua turbines.

Marine & offshore: Lub lawj kho vajtse thiab platform cov qauv raug rau cov dej ntsev txuas ntxiv.

Kev tsim kho & infrastructure: Kev sib txuas ntawm steel ncej, txuas txuas txuas, thiab cov khoom siv sab nraum zoov.

Railway, heavy machinery, aerospace & tiv thaiv: High-strength fastening cov ntsiab lus nyob rau hauv vibration, huab cua, thiab mechanical stress.

6. Kev sib piv nrog cov tshuaj pleev ib ce

Qhov tseem ceeb ntawm kev ua tau zoo sib txawv tseem ceeb vim li cas Dacromet nyiam rau kev ua haujlwm siab hexagonal bolts:

Txheej thickness: Dacromet 4–8 μm |  Electro-galvanizing 5-15 μm |  Kub-dip galvanizing 50-80 μm

Ntsev tshuaj tiv thaiv (tsis muaj xeb liab): Dacromet ≥1,200 h |  Electro-galvanizing 100-300 h |  Kub-dip 500-800 h

Hydrogen embrittlement risk: Dacromet – Tsis muaj |  Electro-galvanizing - Siab |  Kub-dip - nruab nrab

High-temperature resistance: Dacromet mus txog 300 ° C |  Electro-galvanizing ≤100 ° C |  Kub-dip ≤200 ° C

Xov haum: Dacromet tswj kev ua siab ntev; kub-dip galvanizing feem ntau xav tau xov nyiaj them.

7. Cov qauv, qib, thiab cov lus qhia tshwj xeeb

Dacromet hexagonal bolts yog tsim los rau thoob ntiaj teb cov qauv xws li ISO 4014/4017, DIN 931/933, ANSI / ASME B18.2.1, thiab GB / T 5782/5783. Cov cuab yeej cuab tam feem ntau yog 4.8, 8.8, 10.9, thiab 12.9 (metric) lossis Qib 5 thiab Qib 8 (inch). Cov khoom muaj xws li carbon steel thiab alloy steels xws li 35CrMo, 40Cr, thiab 42CrMo. Feem ntau qhov loj me yog M5 txog M36 (qhov loj dua muaj rau cov ntawv thov tshwj xeeb), hauv cov xov tag nrho lossis ib nrab-xov teeb teeb tsa. Ntau lub tsheb OEMs sau Dacromet lossis sib npaug zinc-flake coatings raws li kev pom zoo tiav rau lub zog siab.

8. Kev xav txog ib puag ncig

Cov tshuaj Dacromet cov ntawv sau ua ke muaj hexavalent chromium hauv cov ntawv khi. Thaum cov txheej txheem kho tau ruaj khov thiab cov txheej txheem tsim cov dej khib nyiab tsawg dua li cov txheej txheem electroplating, cov kev cai ib puag ncig tau tsav kev tsim cov chromium-dawb lwm yam xws li Geomet® thiab lwm yam niaj hnub zinc-flake systems. Cov no khaws cov txiaj ntsig tseem ceeb ntawm Dacromet thaum ua tau raws li RoHS nruj dua thiab REACH cov cai.

Zuag qhia tag nrho, cov txheej txheem Dacromet yog suav tias yog ib puag ncig zoo dua li cov pa electro-galvanizing vim nws tshem tawm cov kua qaub da dej, cov tshuaj cyanide, thiab kev kho dej khib nyiab ntau. Cov dej-raws li chemistry kuj ua rau tsis muaj volatile organic compound (VOC) emissions.

9. Cov lus xaus

Dacromet hexagonal bolts muab cov kev ua haujlwm siab rau cov ntawv thov uas xav tau ob qho tib si kev ntseeg siab thiab kev tiv thaiv corrosion mus ntev. Lawv kev sib xyaw ua ke ntawm cov txheej txheej ultra-thin tsis tau zoo heev, ua tiav kev ywj pheej los ntawm hydrogen embrittlement, kev tiv thaiv tshav kub zoo, thiab kev tswj kom meej meej ua rau lawv tshwj xeeb tshaj yog muaj txiaj ntsig rau cov khoom siv muaj zog hauv tsheb, lub zog, marine, thiab cov qauv kev tsim vaj tsev.

Raws li kev cai ib puag ncig hloov zuj zus, chromium-free zinc-flake coatings tau los ntawm thawj Dacromet thev naus laus zis txuas ntxiv nthuav dav ntau yam kev xaiv ua raws. Txawm hais tias tau teev tseg raws li classic Dacromet los yog qhov sib npaug niaj hnub, cov coated hexagonal bolts xa cov pov thawj ruaj khov uas ua rau muaj kev pab cuam lub neej ntev thiab txo cov nqi tu hauv qhov chaw corrosive thiab kub kub. Rau cov pob qij txha tseem ceeb uas tsis ua haujlwm tsis yog ib qho kev xaiv, Dacromet hexagonal bolts tseem yog ib qho ntawm cov kev txhim khu kev qha tshaj plaws thiab cov txheej txheem txheej txheem fastener kev daws teeb meem niaj hnub no.