Yuav ua li cas xaiv cov txheej txheem kho saum npoo ntawm fasteners?

Yuav luag tag nrho cov fasteners yog ua los ntawm cov hlau thiab hlau alloy, thiab cov fasteners dav dav yuav tsum tau tiv thaiv corrosion.Tsis tas li ntawd, cov txheej txheem ntawm kev kho deg yuav tsum ua raws nraim.

Raws li kev kho saum npoo, tib neeg feem ntau them nyiaj rau kev zoo nkauj thiab kev tiv thaiv corrosion, tab sis lub luag haujlwm tseem ceeb ntawm fasteners yog fastening kev twb kev txuas, thiab kev kho deg kuj muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm fasteners.Yog li ntawd, thaum xaiv qhov kev kho mob saum npoo, peb yuav tsum xav txog qhov tseem ceeb ntawm kev ua haujlwm nrawm, uas yog, qhov sib xws ntawm kev teeb tsa torque thiab preload.

1. Electroplating

Electroplating ntawm fasteners txhais tau hais tias ib feem ntawm fasteners yuav tsum tau electroplated yog immersed nyob rau hauv ib tug tshwj xeeb aqueous tov, uas yuav muaj ib co deposited hlau tebchaw, yog li ntawd tom qab dhau los ntawm cov aqueous tov nrog tam sim no, cov hlau nyob rau hauv cov tshuaj yuav precipitate thiab ua raws li. qhov immersed ib feem ntawm fasteners.Electroplating ntawm fasteners feem ntau suav nrog galvanizing, tooj liab, npib tsib xee, chromium, tooj liab-nickel alloy, thiab lwm yam.

2. Phosphating

Phosphating yog pheej yig dua galvanizing, thiab nws cov corrosion kuj yog phem dua galvanizing.Muaj ob txoj hauv kev siv phosphating rau fasteners, zinc phosphating thiab manganese phosphating.Zinc phosphating muaj cov cuab yeej lubricating zoo dua li manganese phosphating, thiab manganese phosphating muaj kev tiv thaiv corrosion zoo dua thiab hnav tsis kam tshaj zinc plating.Phosphating khoom xws li txuas qws bolts thiab ceev ntawm lub cav, lub tog raj kheej taub hau, lub ntsiab bearings, flywheel bolts, log bolts thiab ceev, thiab lwm yam.

3. Oxidation (blackening)

Blackening + oiling yog txheej nrov rau kev lag luam fasteners, vim tias nws yog qhov pheej yig tshaj plaws thiab zoo nkaus li zoo ua ntej cov roj siv tas.Vim tias blackening yuav luag tsis muaj peev xwm xeb, nws yuav xeb sai tom qab nws tsis muaj roj.Txawm nyob rau hauv lub xub ntiag ntawm cov roj, qhov nruab nrab ntsev tshuaj tsuag tuaj yeem ncav cuag 3 ~ 5 teev xwb.

4. Kub dipping zinc

Kub galvanizing yog thermal diffusion txheej uas zinc yog rhuab rau cov kua.Nws cov txheej tuab yog 15 ~ 100μm, thiab nws tsis yooj yim los tswj, tab sis nws muaj kev tiv thaiv corrosion zoo, yog li nws feem ntau siv hauv engineering.Vim yog qhov kub-dip zinc ua, (340-500C) nws tsis tuaj yeem siv rau fasteners saum qib 10.9.Tus nqi ntawm kub-dip galvanizing ntawm fasteners yog siab dua li ntawm electroplating.

5. Zinc impregnation

Zinc impregnation yog cov khoom metallurgical thermal diffusion txheej ntawm zinc hmoov.Nws uniformity yog qhov zoo, thiab txawm tias cov khaubncaws sab nraud povtseg tuaj yeem tau txais hauv cov xov thiab qhov muag qhov muag.Lub thickness ntawm txheej yog 10 ~ 110μm, thiab qhov yuam kev tuaj yeem tswj tau li ntawm 10%.Nws lub zog sib txuas thiab kev tiv thaiv corrosion nrog lub substrate yog qhov zoo tshaj plaws ntawm zinc txheej (electro-galvanizing, kub-dip galvanizing thiab dacromet).Nws cov txheej txheem ua yog tsis muaj kuab paug thiab feem ntau ib puag ncig tus phooj ywg.Yog tias peb tsis xav txog chromium thiab kev tiv thaiv ib puag ncig, nws yog qhov tsim nyog tshaj plaws rau cov khoom siv muaj zog uas muaj kev tiv thaiv corrosion siab.

Lub hom phiaj tseem ceeb ntawm kev kho saum npoo ntawm fasteners yog ua kom cov fasteners tau txais kev tiv thaiv corrosion, thiaj li ua rau kom muaj kev ntseeg siab thiab yoog raws ntawm fasteners.


Post lub sij hawm: Dec-08-2022