Dab tsi yog cov nquag ntsia hlau hau kho cov txheej txheem?

Cov txheej txheem ntawm kev tsim cov txheej saum npoo av nyob rau saum npoo ntawm cov khoom siv txheej txheem ntawm cov txheej txheem ntawm cov khoom siv, thiab cov yam ntxwv siv lub cev, thiab tshuaj lom neeg yog lub npe hu ua kev kho deg. Kev kho deg yog siv los ua kom txaus siab cov lus qhia tshwj xeeb rau cov khoom xws li cov khoom lag luam tsis kam, thiab kev ua kom zoo nkauj.

Ntxiv nrog rau thawj cov qauv, corrosion tsis kam thiab saib xim yuav tsum tau coj mus rau hauv tus account thaum xaiv cov screws. Rauscrews, cov txheej txheem kho deg xws li oxidation, Electrophoresis, electroplating, dacromet, thiab lwm tus neeg nquag siv.

Raws li cov xim saum npoo ntawm cov ntsia hlau, nws tuaj yeem faib ua cov hauv qab no:

Dub Plated Screws

Hom dubscrewsTsuas yog suav nrog kev kho mob oxidation blolidation, electroplating, thiab elecophoresis.

Kho oxidation kev kho mob

Kev kho mob oxidation oxidation yog ib qho kev kho tshuaj txawv txawv, lub hom phiaj yog los tsim cov yeeb yaj kiab oxide rau ntawm cov cua thiab tiv thaiv xeb.

Cov txheej txheem yog siv cov oxidant muaj zog rau oxidize saum npoo ntawm cov hlau mus rau hauv ntom thiab du ferroferric oxide. Qhov no nyias txheej ntawm ferroferric oxide tuaj yeem tiv thaiv sab hauv ntawm cov hlau los ntawm oxidation. Muab faib ua qhov kub tsawg thiab kub.

Ferrroferric oxide tsim nyob rau ntawm tsawg kub (txog li 350 ° c) tsaus dub dub, tseem hu ua dub. Ferrroferric oxide tsim los ntawm oxidation thaum kub (kwv yees li 550 ° c) yog lub npe xiav, tseem hu ua Bluing Kev Kho Mob. Kev kho mob xiav feem ntau siv hauv kev tsim riam phom, thiab kev kho dub yog feem ntau siv hauv kev lag luam tsim khoom.

Oxidizing cov hlau saum npoo av kom ntom, du ferroferric oxide yuav tsum muaj cov muaj zog oxidant. Cov oxidant muaj zog yog tsim los ntawm sodium hydroxide, sodium nitrite, thiab trisodium phosphate. Thaum nws hloov cov xim xiav, kho cov hlau uas muaj cov muaj zog oxidant yaj, thiab thaum nws tig nws nrog cov tshuaj aqueous ntawm cov muaj zog oxidant.

Hluav taws xob

Electroplating yog cov txheej txheem ntawm kev siv electrolysis kom lub tsho tiv no txheej txheej ntawm lwm cov yeeb yaj kiab hlau lossis alloy zaj duab xis ntawm cov hlau nto. Lub hom phiaj yog txhawm rau txhim kho kev hnav tsis kam, corrosion tsis kam, thiab zoo nkauj.

Muaj 2 hom kev plating dub: Dub Zinc plating thiab dub Nickel plating.

Dub Zinc Plated Screws

Dub Zinc plating yog ib hom kev tawm tsam oxidation oxidation, uas haum rau cov khoom siv kho vajtse. Zinc yog qhov siv tshuaj thiab yooj yim oxidized thiab tsaus ntuj hauv cov cua. Tom qab galvanizing, nws yog kho nrog chromate los npog cov tshuaj hloov pauv kev hloov pauv ntawm cov kav dej siab ntev, yog li cov txheej txheem passive, uas yog cov txheej passive ntawm zinc txheej. Zaj duab xis passivation tuaj yeem faib ua dawb passivation (dawb zinc), xiav zinc), dub passivation (dub passivation (ntsuab zinc), thiab lwm yam.

Feem ntau, cov txheej txheem ntawm electroplating dub zinc yog durching-tu-qaug-contro-tu-tu-surleing-sefting-sefting xim.

DUB NICKEL Plated Screws

Feem ntau, cov txheej txheem ntawm electroplating dub nickel yog degreasing - tu - biuration plating - tu - tu - chaw qhuav - xaim xim.

Lub Dub Npee Npee roj puv ntov tau los ntawm cov Black Npib Nickel da dej muaj 40-60% zinc, 10-15% leej faj, thiab li 10% cov organic teeb meem. Cov xim dub yog tshwm sim los ntawm lub xub ntiag ntawm cov nickel dub los ntawm cov txheej xim vim qhov txo ntawm thiocyanate nyob rau cathode tso cov sulfide ions. Tus tooj liab hauv qab yog ntxiv rau hauv cov txheej txheem, thiab lub luag haujlwm tseem ceeb yog ua rau Nickel plating yooj yim hauv kev ua haujlwm xa rov qab yooj yim ntawm cov ntsia hlau.

Electrophoresis

Electrophoresis hais txog qhov tshwm sim nyob rau hauv uas them cov lus tshem tawm mus rau cov electrical ntawm cov khoom siv hluav taws xob rov qab hauv qab.

Dub electrophoresis yog kev siv cov hluav taws xob sab nraud kom ua rau cov pigments thiab cov resins rau hauv electrophoresis kev tawm tsam thiab tso nyiaj rau ntawm ib qho ntawm cov electrodes. Electrophoretic Dub yog dav siv hauv kev lag luam, noj cov txheej txheem dub ua piv txwv: kev tu - phosphatic xim pleev xim - ziab. Nws tuaj yeem muab faib ua anodic electrophoresis (cob qhia tsis zoo ions tom qab ionization) thiab cov ntaub ntawv Cathodic electrophoresis (Resin ua tau zoo ions electrophoresis). Piv nrog cov txheej txheem pleev xim, nws tau ua kev tsim kho zoo dua, tsis muaj kuab lom thiab ntau dua, thiab cov nqi thiab corrosion tsis zoo ib yam li cov txheej txheem dacromet.

Dawb platedscrews

Cov ntsia hlau dawb tsuas yog suav nrog Kev Siv Hluav Taws Xob Hluav Taws Xob Dawb, Dawb Zinc, thiab lwm yam.

Hluav Taws Xob Kom Dawb Zinc

Dawb Zinc Plated Screws

Cov txheej txheem ntawm elecmating dawb zinc yog degrasing-tu-qaug zog acid ua kom-electro-tu-tu-tu-tu-tu-ntxuav. Qhov sib txawv los ntawm dub zinc yog tias tsis muaj cov xim sib khi dhau los, thiab kev daws teeb meem tseem sib txawv kuj sib txawv. Dawb passiveation yog ib qho tsis muaj xim thiab pob tshab zinc oxide zaj duab xis uas muaj tsis zoo dua li ntawm dub zinc, xiav zinc, thiab xim zinc.

Lub corrosion tsis kam ntawm dawb zinc yog zoo dua li ntawm npib tsib xee dawb, thiab nws cov tsos tsaus dua li ntawm npib dawb.

Electroplating Dawb Npib Npee

Dawb npib tsib xee platedscrews

Cov txheej txheem ntawm electroplating cov npib dawb yog degreasing - tu - tooj liab plating - tu - passing - tu - lossis ziab khaub ncaws. Cov txheej txheem ntawm electroplating cov npib tsib xee thiab electroplating dub nickel yog qhov sib txawv ntawm cov tshuaj electrolating, tsis tas li ntawd ntxiv ntawm zinc sulfide.

Lwm cov xim ploojscrews

Xim Plated Screws

Lub plating ntawm lwm cov xim feem ntau suav nrog xiav zinc, ntsuab zinc, xim zinc, thiab dacromet.

Txheej txheem electroplating ntawm xiav zinc thiab ntsuab zinc yog kwv yees tib yam li cov dawb zinc. Xiav zinc yog cov yeeb yaj kiab passivated toinc oxide muaj 0.5-0.6 mg / dm2 ntawm troment chromium. Ntsuab passivation yog vim qhov tseeb hais tias qhov passivation daws ions, thiab lub txiaj ntsig ntsuab zaj yeeb yaj kiab muaj nyob ntawm chromate thiab phosphate.

Lub corrosion resistance ntawm zinc xiav yog qhov zoo dua li ntawm zinc dawb, thiab cov xeb tsis kam ntawm ntsuab zinc zoo dua li ntawm zinc xiav.

Xim Zinc muaj qhov zoo corrosion tsis zoo. Cov txheej txheem passivation yog: Galvanizing - tu - 2% -3% nitric acid los tawm lub teeb - tu - Kev tu - Kev tu - Ci Aging. Tsawg dhau qhov kub tsawg dhau thaum lub sijhawm dhau passivation yuav ua rau qeeb zaj duab xis thiab nyias xim zaj duab xis. Qhov kub siab yuav ua rau cov yeeb yaj kiab kom tuab thiab xoob, thiab cov nplaum yuav tsis muaj zog. Nws yog qhov zoo tshaj plaws los tswj ib ncig ntawm 25 degrees kom ntseeg tau tias koj tau txais tib xim rau qee lub sijhawm. Tom qab passivation, nws yuav tsum tau muab ci txhawm rau txhawm rau txhim kho cov nplaum thiab corrosion tsis kam ntawm zaj duab xis.

Kem dacromet

Dacromet yog hom tshiab ntawm kev tiv thaiv corrosion nrog zinc f hmoov, hmoov txhuas, cov dej chromic acid, thiab cov dej chromic, thiab cov dej khib nyiab raws li lub ntsiab. Cov txheej txheem ntws yog organic kuab-kho tshuab polishing - txau - ci - txau - ci ntsa iab - ziab khaub ncaws.

Qhov kom zoo dua ntawm cov txheej txheem dacromet yog tias cov corrosion kuj yog qhov zoo heev, tab sis qhov tsis zoo yog tias cov txheej tsis zoo.

Xaiv cov chaw tsim khoom siv tshwj xeeb

Dongsoo muaj ntau tshaj kaum xyoo kev paub hauv kev tsim cov fasteners xws li screws, txiv ntoo, bolts, thiab tuaj yeem ua ntau yam kev kho mob ntawm lawv. Tiv tauj peb yog tias koj xav yuav cov qauv loj ntawm cov qauv nyiaj tau los yog kho kom haum rau koj lub vev xaib ntawm ds-fasteners.com kom paub ntau ntxiv txog peb cov khoom. Rau cov lus nug, koj tuaj yeem hu rau peb ntawm cov ntawv nyeem tawm.facebook.