316 stainless hlau corrosionistance hom

Corrosion Kuj Seev Txoj Kev Ntsuam Xyuas rau 316 Stainless Hlau

316 Stainless hlau yog paub rau nws cov kev ua tau zoo heev, tab sis nws kev ua tau tseem tuaj yeem sib txawv raws li ib puag ncig. Cov hauv qab no yog feem ntau siv cov qauv ntsuas los ntsuas seb nws tus cwj pwm corrosion:

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1. 316 Stainless hlau intergranular (icc) xeem

Lub hauv paus ntsiab lus:
Intergranular corrosion tshwm sim thaum cov cheeb tsam chromium-depreted fones daim ntawv ntawm cov ciaj ciam ntawm kev kho mob lossis vuam. Cov chaw no ua Anodic ib txheeb ze rau sab hauv qab sab hauv, uas ua rau kev xaiv corrosion raws cov ciaj ciam.

Txoj kev xeem:
As perGB \/ T 4334-2020(Corrosion ntawm cov hlau thiab alloys - intergranular corrosion kev ntsuam xyuas kev sim rau cov hlau tsis muaj), cov hau kev muaj xws li:

Txoj kev e(Tooj liab sulfate-sulfuric acid xeem)

Qauv F(Hlau sulfate-sulfuric acid xeem)

Piv txwv li, hauvTxoj kev e, cov hnoos qeev yog raus rau hauv lub rhaub tooj liab sulfate + sulfuric acid daws rau ib lub sijhawm. Post-raug, corrosion ntawm cov ciaj ciam yog ntsuas los ntawm:

Mefile, txhawm rau ntsuas cov kev ntxhov siab.

Los ntawmLub cev yuag, sib piv cov qauv pawg ua ntej thiab tom qab sim.

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2. 316 Stainless Hlau Pitting Corrosion

Lub hauv paus ntsiab lus:
Pitting yog daim ntawv hauv zos ntawm corrosion los ntawm chloride ions (clr), tshwj xeeb hauv cov tub rog lossis tshuaj lom neeg ib puag ncig. Nws pib ntawm cov pob nyiaj tsis muaj zog, tsim cov pits me me uas yuav ua rau tsis ua haujlwm.

Txoj kev xeem:
As perASTM G48, feem ntau siv cov txheej txheem suav nrog:

Txoj kev a: Immersion hauv 6% Ferric chloride (FECL₃)

Txoj kev b: Immersion hauv 10% Fecl₃ daws

Qhov quav me me yog nthuav tawm cov kev daws teeb meem nyob rau hauv kev tswj kub thiab sijhawm. Lub xub ntiag, qhov tob, thiab raws li cov pits yog tom qab ntawd tshuaj xyuas los ntawm:

Kev Saib Xyuas Kev Pom,

Kev Ntsuas Loj Ntsuas Ntsuas,

Lossismetallographic tsom xam.

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3. 316 Stainless hlau General (sib xyaw) corrosion xeem

Lub hauv paus ntsiab lus:
Cov kev coj ua tsis zoo rau cov khoom siv uas poob thoob plaws saum npoo thaum uas raug rau qhov nruab nrab hauv nruab nrab.

Txoj kev xeem:
Cov hnoos qeev yog immersed nyob rau hauv xaiv xaiv corrosive tov (piv txwv li, acidic, alkaline, lossis haus dej) nyob rau hauv cov kev mob sijhawm thiab kub. Tom qab nphav raug los sis ntsib:

Corrosion cov khoom raug tshem tawm,

Cov qauv yog ntxuav, qhuav, thiab hnyav,

Corrosion tus nqiyog xam los ntawm kev poob phaus,

Lossis cov kev hloov tuab yog ntsuas.

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4. 316 Stainless Hlau Kev ntxhov siab corrosion cracking (SCC) xeem

Lub hauv paus ntsiab lus:
SCC yog lub tshuab ntsuas tsis ua haujlwm uas tshwm sim nyob rau hauv kev sib xyaw ua ke ntawm lub cev muaj kev ntxhov siab ntau yam, ib puag ncig muaj kev nyuaj siab, feem ntau nyob rau hauv muaj cov kab chloride.

Txoj kev xeem:

U-khoov xeem:Qhov quav me yog khoov rau hauv u-duab thiab muab tso rau hauv chloride-muaj cov kev daws (piv txwv li, qab ntsev) thaum nce qhov kub. Nws yog tom qab ntawd pom nyob rau lub sijhawm rau cov tsos thiab kev tshaj tawm ntawm cov kab nrib pleb.

Tas peev Tensile Kuaj:Lub tensile load yog thov rau ib qho me me raus rau hauv ib qho nruab nrab ntawm thaj tsam, thiab covNreeb pib lub sijhawmthiabThawb Txoj Kev Loj Hlobtau sau tseg.