Passivation - Txheej Txheem Kho Nto

Passivation - Txheej Txheem Kho Nto

Hloov tshiab kawg 08/29, lub sij hawm los nyeem: 5mins

Parts tom qab ib tug passivating txheej txheem

Ib qho ntawm cov teeb meem tseem ceeb rau cov kws kho hlau, yog los tiv thaiv cov khoom siv los ntawm corrosion thiab lwm yam kab mob ntawm cov txheej txheem tsim khoom xws li machining, fabricating, thiab vuam tsim cov khib nyiab, suav nrog, hlau oxides, thiab tshuaj lom neeg, roj thiab roj.Nrog rau cov no, thaum raug huab cua thiab dej, ntau cov hlau yog qhov yooj yim rau corrosion.Qhov no yuav ua rau cov hlau nyob rau hauv kev ntxhov siab thiab tej zaum yuav muaj kev puas tsuaj thaum lub sij hawm tsim khoom lossis ntawm cov khoom siv kawg.Yog li, yuav tsum tau tiv thaiv cov hlau los ntawm cov kab mob no thiab corrosion.Ib txoj kev zoo li no yoghlau passivation, txheej txheem ntawm muab cov txheej txheem oxide nyias nyiasntxiv rau corrosion kuj, ncua ib feem ntawm lub neej, tshem tawm cov paug paug, txo qhov kev pheej hmoo ntawm ib feem kis kab mob thiab ncua lub sij hawm tu lub cev.

Nws ua haujlwm li cas?

Txhawm rau tiv thaiv cov hlau sib txawv los ntawm kev xeb, kev siv tshuaj lom neeg ua tiav siv dav siv los ua cov txheej txheem tom qab kev tsim khoom hu ua Passivation.Hauv cov txheej txheem no, oxidants me me xws li nitric thiab citric acid feem ntau yog siv.Lub exogenetic dawb hlau, sulphides thiab lwm yam txawv teb chaws hais los ntawm qhov chaw yuav raug tshem tawm los ntawm cov acids thiab tsim ib tug oxide txheej los yog zaj duab xis uas yuav ua raws li ib tug tiv thaiv kev tiv thaiv.Qhov no txo ​​qis qhov yuav tshwm sim uas yuav muaj cov tshuaj tiv thaiv ntawm cov khoom siv hlau thiab cov huab cua, uas ua rau lub ntsej muag tiv thaiv corrosion tsis hloov nws cov tsos.Qhov tseem ceeb ntawm cov txheej txheem no yog tias cov kua qaub yuav tsum tsis txhob cuam tshuam rau cov hlau nws tus kheej.

Cov kauj ruam ntawm Passivating txheej txheem

Feem ntau yog peb kauj ruam nyob rau hauv cov txheej txheem passivating, uas yuav tsim ib tug ua tiav nyias thiab zoo oxide txheej ntawm cov hlau nplaum.

Kauj Ruam 1: Kev ntxuav cov khoom siv

Cov khoom siv hlau ntxuav xws li, tshem tawm cov roj av, tshuaj lom neeg lossis cov khib nyiab pov tseg los ntawm kev ua haujlwm yog qhov pib ntawm cov txheej txheem passivation.Kev tu cov khoom siv lub luag haujlwm tseem ceeb hauv cov txheej txheem no, tsis muaj cov kauj ruam no, cov khoom txawv teb chaws ntawm cov hlau yuav txwv qhov kev ua haujlwm ntawm passivation.

Kauj ruam 2: Acid da dej immersion

Txhawm rau tshem tawm cov hlau tsis pub dawb los ntawm qhov chaw, qhov immersion ntawm cov khoom hauv cov kua qaub da dej ua raws li cov kauj ruam tu.Muaj peb txoj hauv kev uas siv rau hauv cov kauj ruam ntawm cov txheej txheem no

Kauj Ruam 3:Nitric Acid da dej

Txoj hauv kev ib txwm ua rau kev ua kom dhau yog Nitric acid, uas rov faib cov qauv molecular ntawm cov hlau saum npoo zoo tshaj plaws.Txawm li cas los xij, vim nws qhov kev faib tawm raws li cov khoom siv phom sij, nitric acid muaj qee qhov tsis zoo.Nws tso tawm cov pa phem uas muaj kev phom sij rau ib puag ncig thiab yuav xav tau lub sijhawm ua haujlwm ntev dua nrog kev tuav tshwj xeeb.

Kauj Ruam 4:Nitric Acid nrog Sodium Dichromate Bath

Kev koom ua ke ntawm sodium dichromate rau hauv nitric acid intensifies cov txheej txheem passivation nrog qee cov alloys tshwj xeeb.Txoj hauv kev no yog qhov kev xaiv tsawg dua, vim tias sodium dichromate ua kom muaj kev phom sij ntawm nitric acid da dej.

Citric Acid da dej

Lub citric acid da dej yog qhov kev nyab xeeb dua rau nitric acid rau cov txheej txheem passivating.Nws tsis tso tawm cov pa roj carbon monoxide, tsis tas yuav muaj kev tuav tshwj xeeb thiab nws tseem yog txoj hauv kev zoo hauv eco.Cov tebchaw ntawm citric acid passivation, muaj kev pheej hmoo ntawm kev loj hlob ntawm cov organic thiab pwm, uas nws tau tawm tsam kom tau txais kev lees paub.Nyob rau hauv xyoo tas los no, kev tsim kho tshiab tau tshem tawm cov teeb meem no, ua rau nws muaj txiaj ntsig zoo.

Txhawm rau rov ua kom cov hlau tsis zoo rau nws cov khoom siv raw, tsis hais txog kev siv txoj hauv kev, cov txheej txheem da dej no ua rau cov tshuaj tiv thaiv rau ntawm qhov chaw.Qhov no yuav ntxiv cov txheej nyias nyias ntawm cov oxide zaj duab xis nrog me ntsis-rau-tsis muaj hlau molecule.

Passivation Methodology

1.  Tank immersion:Cov tivthaiv yuav muab tso rau hauv lub tank uas muaj cov tshuaj lom neeg thiab nws yog qhov zoo rau kev kho txhua qhov chaw fabrication tib lub sijhawm rau kev ua kom zoo sib xws ntawm kev ua tiav thiab zoo tshaj plaws corrosion kuj.

2. Kev ncig:Nws raug pom zoo kom ua tiav rau cov kav dej uas yuav nqa cov kua dej corrosive, uas cov tshuaj lom neeg tau nthuav tawm los ntawm cov kav dej.

3. Daim ntawv thov:Cov tshuaj tov yog txau rau ntawm qhov chaw tiv thaiv.Kev pov tseg cov kua qaub kom raug thiab cov txheej txheem kev nyab xeeb yog qhov tseem ceeb rau hom txheej txheem no thiab nws muaj txiaj ntsig zoo rau kev kho mob ntawm qhov chaw.

4. Daim ntawv thov gel:Los ntawm txhuam ntawm pastes los yog gels rau ntawm qhov chaw, kev kho mob tuaj yeem ua tiav.Nws muaj txiaj ntsig zoo rau kev kho qhov chaw ntawm welds thiab lwm qhov chaw sib txawv uas yuav tsum tau ua kom ntxaws.

Cov ntaub ntawv dab tsi tuaj yeem Passivated?

·       Anodizingntawm Aluminium thiab Titanium.

·       Cov khoom siv hlau xws li hlau.

·       Stainless hlau, uas tuaj yeem muaj chrome oxide nto.

·       Nickel, qee daim ntawv thov muaj nickel fluoride.

·       Silicone, Silicone Dioxide uas yog siv hauv kev lag luam semiconductor.

Cov txheej txheem Passivating

Rau kev txhim kho durability thiab lub neej ntev, ntau yam kev lag luam ua lag luam rau cov khoom lag luam uas cov tuam txhab ua tiav cov khoom tsim nrog cov txheej txheem passivation.

Kev kho mob:Hauv kev saib xyuas kev noj qab haus huv, txhawm rau txo cov kab mob sib kis ntawm cov khoom siv kho mob, cov kws tshaj lij siv cov txheej txheem passivation.Cov oxide txheej ntawm qhov chaw passive tiv thaiv cov kab mob microscopic, ua rau lub ntsej muag huv thiab du uas yooj yim rau kom tsis muaj menyuam.

Khoom noj khoom haus thiab dej haus:Cov kev cai huv huv yog qhov tseem ceeb rau ntau lub lag luam. Txhawm rau txo qhov kev pheej hmoo ntawm corrosion thiab xeb cuam tshuam cov cuab yeej lossis cov khoom siv zaum kawg, cov khoom siv passivation yog qhov tseem ceeb.

Aerospace Kev Lag Luam:Lub Cheebtsam uas yuav tsum tau passivation yog Stainless hlau qhov chaw, Actuators, Hydraulic Actuators, tsaws iav Cheebtsam, Control rods, Exhaust Cheebtsam nyob rau hauv dav hlau engine thiab Cockpit fasteners.

Khoom siv hnyav:Pob Bearings thiab Fasteners

Tub rog:Cov phom thiab cov khoom siv tub rog

Zog Sector:Fais fab kev faib tawm thiab Kev xa tawm

Pros thiab Cons ntawm Passivating txheej txheem

Pros

·       Tshem tawm cov kab mob seem tom qab machining

·       Nce Corrosion Resistance

·       Txo qhov kev pheej hmoo ntawm kev kis kab mob thaum lub sijhawm tsim khoom

·       Enhanced tivthaiv kev ua tau zoo

·       Uniform thiab du tiav / tsos

·       ci ntsa iab

·       Ib qho yooj yim los ntxuav qhov chaw

Cons

·       Passivation tsis zoo ntawm kev tshem tawm cov kab mob ntawm cov khoom siv welded.

·       Raws li cov txheej txheem hlau alloy, qhov kub thiab txias thiab hom tshuaj da dej yuav tsum tau tswj xyuas.Qhov no yuav ua rau kom tus nqi thiab complexity ntawm cov txheej txheem.

·       Cov kua qaub da dej tuaj yeem ua rau qee cov hlau alloys puas tsuaj, uas muaj cov ntsiab lus tsis tshua muaj chromium thiab npib tsib xee.Yog li, lawv tsis tuaj yeem passivated.

FAQs txog Passivation

1.  Puas yog passivation tib yam li pickling?

Tsis yog, Pickling txheej txheem tshem tawm tag nrho cov khib nyiab, flux thiab lwm yam kab mob los ntawm qhov chaw ntawm qhov chaw welded thiab npaj txhij rau passivation.Pickling tsis tuaj yeem tiv thaiv cov hlau los ntawm corrosion, nws tsuas yog ntxuav qhov chaw rau passivation.

2.  Puas passivation ua stainless hlau corrosion pov thawj?

Tsis yog, tsis muaj qhov zoo li 100% corrosion-proof.Txawm li cas los xij, stainless hlau qhov chaw muaj qhov tshwj xeeb ntev lifespan vim cov txheej txheem passivation.

3.  Puas yog passivation ntawm stainless hlau xaiv tau?

Tsis yog, passivation yog txheej txheem tseem ceeb rau stainless hlau Cheebtsam.Cov tivthaiv yuav raug cuam tshuam los ntawm corrosion nyob rau hauv lub sij hawm luv luv yam tsis muaj txheej txheem passivating.