Qhov zoo thiab kev sib piv kev sib piv ntawm Cov Txheej Txheem Kev Kho Mob Ntog rau Fasteners 

I. Cov txheej txheem kho saum npoo tseem ceeb rau fasteners thiab lawv cov txiaj ntsig tseem ceeb

1. Electrogalvanizing (xws li Xiav-White Zinc thiab Xim Zinc)

Electrogalvanizing (txias galvanizing) yog txheej txheem uas tso ib txheej zinc txheej rau ntawm qhov chaw fastener ntawm electrolysis, muaj nyob rau hauv hom xws li xiav-dawb zinc thiab xim zinc. Nws yog txoj kev siv ntau tshaj plaws uas tsis muaj nqi kho mob rau kev lag luam fasteners. Nws cov txiaj ntsig tseem ceeb suav nrog cov thev naus laus zis paub tab, tus nqi qis, tswj tau txheej txheej tuab (5-15μm), qhov chaw siab kawg, thiab ntau yam xim xaiv, ua rau nws tsim nyog rau cov kev xav tau ntawm sab hauv lub teeb los tiv thaiv corrosion scenarios. Rau me me threaded fasteners (piv txwv li, hauv qab M8), electrogalvanizing tsis thaiv cov xov los yog qhov, muab kev sib dhos zoo heev, muaj kev lag luam siab heev, thiab kev ua haujlwm luv luv.

Nws yuav tsum raug sau tseg tias electrogalvanizing muaj qee qhov kev pheej hmoo ntawm hydrogen embrittlement thiab tsuas yog siv tau rau cov fasteners nrog hardness hauv qab HRC38. Ntxiv mus, nws cov kev ua haujlwm tiv thaiv corrosion yog nruab nrab. Qhov nruab nrab ntsev tsuag tshuaj ntsuam (NSS) lub sij hawm zoo tib yam electrogalvanizing feem ntau yog 24-96 teev, uas tuaj yeem txuas ntxiv mus rau ntau tshaj 200 teev tom qab kho nrog cov sealants tshwj xeeb, tab sis tus nqi yuav nce 5-8 zaug raws li.

2. Non-Electrolytic Zinc Flake Txheej (Dacromet/DACROMET)

Dacromet yog ib hom tshiab txheej uas yog tsim los ntawm zinc hmoov, txhuas hmoov, thiab chromic acid, tsim los ntawm dip txheej thiab ci curing. Nws yog cov txheej txheem nyiam rau lub sij hawm ntev los tiv thaiv corrosion nyob rau hauv ib puag ncig hnyav, nrog rau cov ntsiab lus tseem ceeb: tsis muaj hydrogen embrittlement txaus ntshai, ua rau nws haum rau high-strength fasteners; corrosion kuj zoo heev, nrog rau qhov nruab nrab ntsev tsuag tshuaj ntsuam (NSS) ntev ntawm 500-800 teev rau ib txheej thiab 1500-2000 teev rau ob txheej, nrog rau qhov kub thiab txias tsis kam (ntev ≤250 ℃); Kev sib txhuam kev ua tau zoo tswj, uas ua kom muaj zog clamping sib xws rau kev sib txuas tseem ceeb thiab tsim nyog rau cov xwm txheej uas xav tau siab rau kev sib txuas ncaj ncees.

Nws qhov tsis zoo yog qhov tsis zoo rau kev hloov pauv me me hauv qab M8 lossis sab hauv tsav threaded fasteners, vim tias txheej yuav cuam tshuam rau kev sib dhos; Tus nqi nruab nrab, kev lag luam dav dav, thiab cov tsoos Dacromet muaj hexavalent chromium, yog li kev ua raws li ib puag ncig yuav tsum tau them nyiaj rau.

3. Kub-Dip Galvanizing

Kub-dip galvanizing yog cov txheej txheem ntsuas rau sab nraum zoov hnyav tiv thaiv corrosion, tsim cov txheej txheem los ntawm immersing fasteners hauv molten zinc ntawm 440-460 ℃. Nws cov txiaj ntsig tseem ceeb yog txheej txheej tuab (50-100μm), muaj zog adhesion, thiab kev puas tsuaj zoo heev. Txawm hais tias khawb tshwm sim rau ntawm qhov chaw, nws tuaj yeem tiv thaiv corrosion los ntawm kev siv lub cev anode ntawm zinc, nrog rau NSS ntev ntawm 300-1000 teev tom qab passivation. Cov txheej txheem no nta tus nqi nruab nrab, muaj kev ua lag luam zoo, thiab tsis tshua muaj hydrogen embrittlement txaus ntshai rau lub zog siab, ua rau nws siv dav hauv cov khoom siv sab nraum zoov.

Nws cov kev txwv yog qhov tsis zoo ntawm qhov kawg, tsis haum rau qhov tseeb sib dhos scenarios; me me threaded fasteners hauv qab M8 yuav tsum tau tapping tom qab kev kho mob, cuam tshuam rau efficiency; thiab cov txheej txheem ua yuav ua rau tempering hardness hloov, yog li nws yog txwv tsis pub siv rau 12.9-qib los yog alloy steel qib.

4. Kev Kho Mob Dub Oxide (Blueing).

Dub oxide (blueing) kev kho mob ua rau 1-3μm tuab hlau tetroxide (Fe₃O₄) zaj duab xis rau ntawm qhov chaw fastener los ntawm kev kub siab oxidation. Nws cov txiaj ntsig tseem ceeb yog tus nqi qis heev, kev ua haujlwm luv luv, thiab tsis muaj kev cuam tshuam rau qhov ntsuas qhov tseeb ntawm qhov tseeb, ua rau nws tsim nyog rau kev tiv thaiv xeb ntawm cov khoom qis hauv qhov chaw tsis muaj corrosive. Cov txheej txheem no yuav tsum tsis muaj electroplating, poses tsis muaj hydrogen embrittlement kev pheej hmoo, thiab ua hauj lwm raws li ib qho kev xaiv kev lag luam rau cov khoom tsis raug xws li kev sib kis ntawm cov cuab yeej siv tshuab thiab txuas cov khoom siv hauv paus.

Nws cov kev ua haujlwm tiv thaiv corrosion yog qhov tsis muaj zog tshaj plaws, nrog rau qhov nruab nrab ntsev tshuaj tsuag lub sijhawm tsuas yog 4-24 teev, uas tuaj yeem txuas ntxiv mus rau 48-72 teev tom qab cov roj immersion sealing, tsuas yog ua tau raws li cov kev xav tau ntawm kev tiv thaiv xeb, thiab lub ntsej muag gloss yog tsawg, tsis muaj cov cuab yeej zoo nkauj.

II. Kab rov tav sib piv ntawm Core Performances ntawm Main Txheej Txheem

Yog xav paub ntxiv cov lus qhia tshwj xeeb, kev sab laj kev tshaj lij tau pom zoo.