Nrog rau kev txhim kho ceev kev txhim kho ntawm kev lag luam, cov dej hiav txwv loj thiab cov khoom noj muaj nyiaj nplua nuj tau pib nkag mus rau tib neeg lub zeem muag. Dej hiav txwv yog ib lub tsev loj loj muaj peev xwm lub tsev muaj nqis, nplua nuj nyob rau hauv cov peev txheej muaj kev muaj roj ntsha, cov peev txheej hluav taws xob thiab cov dej hiav txwv lub zog. Kev loj hlob thiab siv cov khoom lag luam cov tub rog yog tsis muaj kev tshawb fawb thiab kev sib txhuam ntawm cov khoom siv cuam tshuam thiab kev sib txhuam ntawm cov khoom siv marine thiab kev txhim kho cov khoom siv marine. Kawm cov corrosion thiab hnav tus cwj pwm ntawm 31205 stainless hlau nyob rau hauv ob txoj kev ntsuas thiab corrosion thiab hnav synardy los txheeb xyuas microstructure Theem hloov pauv los ntawm lub kaum sab xis, muaj txiaj ntsig ntawm dej hiav txwv hnav ntawm kev xeb thiab hnav cov khoom ntawm stainless hlau yog tshuaj xyuas cov txiaj ntsig yog raws li hauv qab no:
(1) Tus nqi hnav ntawm 316L hauv qab load yog me dua cov nqi hnav qis dua qis. XRD thiab cov ntaus nrig tsom xam pom tias 316L undergoes martensitic kev hloov pauv thaum lub sijhawm so dej hiav txwv yog li 60% lossis ntau dua; Muab piv rau cov martensite hloov pauv nyob rau hauv ob qho chaw dej hiav txwv, nws tau pom tias Seem dej corrosion hinders tus martensite transformation.
(2) Paas Potentiodyamic Polarization Scanning thiab Electrochemical impedance tau siv los kawm txog 316l microstructural hloov ntawm corrosion tus cwj pwm. Cov txiaj ntsig tau pom tias lub martensitic theem hloov pauv tau cuam tshuam cov yam ntxwv thiab cov ua yeeb yam passive ntawm cov hlau uas stainless hlau, ua rau kev xeb ntawm cov hlau stainless. Lub corrosion kuj yog tsis muaj zog; Electrochemical impedance (EIS) Kev tsom xam kuj tau txog qhov xaus zoo sib xws, thiab cov tsim kev sib nqus thiab cov khoom siv hluav taws xob ntawm hluav taws xob, uas nyob hauv kev hloov pauv ntawm cov hlau hluav taws xob.
(3) Cov khoom poob ntawm316L stainless hlauNyob rau hauv hiav txwv muaj kev sib txhuam yog kev sib txhuam yog kev hnav khaub ncaws corrosion (s ') thiab lub pob martensitic theem kev hloov pauv cuam tshuam rau kev sib raug zoo ntawm cov khoom poob ntawm Txhua feem tau piav qhia.
(4) lub corrosion thiab hnav tus cwj pwm ntawm2205Dual-theem hlau nyob hauv ob qho chaw dej hiav txwv yog kawm. Cov txiaj ntsig tau pom tias: tus nqi ntawm 2205 dual-theem hlau nyob rau hauv siab load tau me dua, thiab dej hiav txwv dej hiav txwv kom tshwm sim nyob rau saum npoo ntawm ob theem ntawm ob theem steel. Microstructural kev hloov xws li deformations, dislocations thiab lattice kev hloov pauv txhim tsa ntawm cov khoom siv tsis kaml-theem; Piv nrog 316L, 2205 dual-theem steel muaj ib tus nqi hnav me me thiab hnav zoo dua.
(5) Kev ua haujlwm electrochemical tau siv los sim cov khoom siv hluav taws xob Electrochemical ntawm cov hnav ntawm ob theem ob theem steel. Tom qab zawv zawv coj hauv dej hiav txwv, txoj kev ua kom tus kheej-corrosion ntawm lub2205Dual-theem hlau txo qis thiab qhov ntom ntom tam sim no nce; Los ntawm electrochemical impedance ntsuas txoj kev (EIS) kuj tau xaus lus ntawm kev coj tus nqi ntawm ntug hlau thiab dej hiav txwv corrosion tsis muaj zog; Lub theem σ tsim los ntawm cov swb ntawm lub dog ntawm cov dej hiav txwv uas muaj kev phom sij, thiab cov pits ib puag ncig ntawm dej hiav txwv cen
(6) cov khoom poob ntawm2205 chav hlau roj duplexFeem ntau yog los ntawm kev sib txhuam ntshiab thiab hnav tau cov khoom pov tseg, cov nyiaj txiag rau li 80% mus rau 90% ntawm tag nrho cov poob. Piv nrog 316L stainless hlau, cov khoom poob ntawm txhua qhov ntawm cov hlau chav tsev ob yog ntau dua li ntawm 316L. Me me.
Hauv cov ntsiab lus, nws tuaj yeem xaus lus tias 2205 dual-theem steel muaj zoo dua corrosion tsis kam nyob rau hauv cov dej hiav txwv thiab yog cov khoom noj nyob hauv hiav txwv thiab hnav ib puag ncig.
Lub Sijhawm Post: Dec-04-2023