Tiag - Lub Ntiaj Teb Kev Siv thiab Kev Ntsuam Xyuas Tsis Zoo: Vim li cas Passive txiav txim rau Stainless Hlau Daus

Lub hauv paus rau phau ntawv

Thaum lub sijhawm kawm txuj ci tom qab cov neeg caij passivation yog qhov tseem ceeb, nkag siab tias nws cuam tshuam li castiag - ntiaj teb kev ua haujlwmyog qhov tseem ceeb tshaj plaws.Stainless hlauUa tsis tiav vim tias zaj duab xis passive tau puas, tsis tiav, lossis rov qab los yog tsis raug cai. Kab lus no tsom rau:

{- Cov Lus Sib Tham Thoob Ntiaj Teb

Ua tsis tiav cov qauv tshwm sim los ntawm kev ua haujlwm tsis zoo

Kev tshawb fawb txog kev lag luam

Siv kev daws teeb meem

Kev Txij Nkawm thiab Re - lub sijhawm caij nyoog

Nyeem ntxiv:Vim li cas thiaj passivation tseem ceeb heev rau kev tswj kav hlau stainless

1. Vim li casStainless hlau tsis tauYog tsis muaj kev poob haujlwm tsim nyog

1.1 Lub zaj duab xis passive yog cov nyias thiab yooj yim

Tsuas yog nanometers tuab, lub chromium oxide zaj duab xis tuaj yeem raug rhuav tshem los ntawm:

Puas Tsum

Vuam

Tus kab chlorides

Kua qaub

Mechanical cuam tshuam

Tsis huv

1.2 Corrosion pib ntawm cov ntsiab lus microscopic

Corrosion feem ntau pib:

Hauv qab tso nyiaj

Nyob Ib Ncig Hauv Welds

Ntawm txiav sawv

Ntawm cov chaw tsis huv nrog cov plua plav hlau

Nyob rau hauv crevices qhov twg oxygen yog txwv

1.3 swb tuaj yeem ua kev puas tsuaj loj

Txawm tias muaj hnub nyoog ua yeeb yaj kiab passive yuav ua rau:

Pitting corrosion

Crevice corrosion

Kev ntxhov siab corrosion tawg

Intergranular corrosion

2. Cov qauv tseem ceeb uas cuam tshuam txog kev ua haujlwm tsis zoo

3. Cov ntaub ntawv tshawb fawb: Tiag - Ntiaj teb tsis ua thiab cov kev daws teeb meem

3Cov .1 Kev Kawm Kev Kawm Txuj Ci 1 -} Tshuaj sib xyaw Tank

Qhov Teeb Meem:
Welded Stainless - mis tank tsim cov xeb ntawm weld nqaws.

Ua rau:
Tshav kub tint los ntawm vuam txo cov chromium rau saum npoo.

Kev daws:

NEEG KHO TSHUAB TXHAIS

Acid pickling

Tag Nrho Citric Acid Passivation

Qhov tshwm sim:
Rust eliminated, saum npoo rov qab mus rau cov tshuaj - qib qib huv.

3.2 Kev Kawm Rooj Sib Tham 2 -} kev tsheb ciav hlau ib puag ncig

Qhov Teeb Meem:
316 Stainless HlauCov tsheb ciav hlau pom pitting corrosion tom qab ib xyoos nyob ze ntawm ntug dej hiav txwv.

Ua rau:
Ntsev tshuaj tsuag thiab chloride -}}}} noo noo puas cov kev ua yeeb yaj kiab passive.

Kev daws:

Nto Polishing

Nitric acid passivation

Kev Tiv Thaiv Cov Txheej Txheem Kev Tiv Thaiv

Qhov tshwm sim:
Loj hlob sai dua ntsev tsis kam.

3.3 Kev tshawb fawb 3 -} brewery pipelines

Qhov Teeb Meem:
Npias cov kab ntau lawm tsim qauv mealallic saj tsis huv.

Ua rau:
Cov kab mob hlau dawb uas tau qhia thaum lub caij pipeline kho.

Kev daws:

Citric acid passivation

Hloov cov ntu tsis huv

Kev ua si re -} passivation program

Qhov tshwm sim:
Purity rov qab, tsis huv muaj kev pheej hmoo tshem tawm.

3.4 Kev Kawm Rooj Zaum 4 - semiconductor Cov Cuab Yeej Raug Ntxhua Khaub Ncaws

Qhov Teeb Meem:
Etching cuab yam corroded thaum raug rau ultra -} Cov tshuaj ntshiab.

Ua rau:
Tsis tsim nyog passivation ua rau lw hlau leaching.

Kev daws:

Electrochemical Passivation

Chromium Do Recumorum

Siv zog nruj me ntsis tuav

Qhov tshwm sim:
Corrosion nres thiab sab purity rov qab los ua qauv txheej txheem semiconductor.

4. Kev Lag Luam -} Cov Kev Xav Tau Tshwj Xeeb

5. Txij Nkawm thiab Repassivation Teem Sijhawm

Niaj hnub tu

Kev Tu Txhua Hli

Tshem tawm ntawm Dhuav cov nyiaj

Nto Tshuaj Xyuas

Rov {- Passivation zaus

Nyob ntawm raug:

Siab - chloride ib puag ncig:txhua 6-12 lub hlis

Kev lag luam raug:txhua txhua 1-2 xyoos

Khoom noj khoom haus / chaw muag tshuaj:txhua xyoo

Raug tsawg:txhua txhua 3-5 xyoos

6. Xaus

Passivation tsis yog ib tug - lub sij hawm txheej txheem- nws cov hauj lwm tswj hwm, thiab lub sijhawm ua haujlwm kom tsim nyog. Tiag {{3} Kev tshawb fawb ntiaj teb Hloov siab, kom raug passivated stainless hlau ua tiav lawm ntau caum xyoo ntawm kev ntseeg siab, corrosion {{5 ayant kev ua haujlwm.

Passivation yog li ntawd aQhov tseem ceeb ntawm stainless hlau lub neej tswj hwm.