Kev Tiv Thaiv Zaj Duab Xis Tsim Kev Txhim Kho
Hauv cov hlau cam khwb cia, tooj liab tuaj yeem koom nrog hauv kev tsim ntawm cov xim oxide. Thaum cov khoom siv tau rau huab cua lossis lwm cov xov xwm corrosive, tooj thiaj li mob siab nrog oxygen. Tooj liab atoms yog qhov xum oxidized los ua ib zaj yeeb yaj kiab tiv thaiv tsuas yog tsim ntawm tooj liab oxide (cu₂o) ntawm cov hlau ductab. Piv txwv li, hauv huab cua noo, cov tshuaj tiv thaiv yuav ua raws li cov tshuaj sib luag qee yam (ua rau muaj ntau yam, thiab rau kev yooj yim, lawv tsis piav qhia ntawm no). Cov yeeb yaj kiab tiv thaiv no tuaj yeem tiv thaiv oxygen thiab noo noo los ntawm ntxiv mus rau hauv lub sab hauv ducal ntawm cov hlau corrosion.
Piv nrog hlau oxide, tooj liab oxide muaj qhov ntom ntom. Qhov no cov yeeb yaj kiab tiv thaiv tuab tuaj yeem ua tau zoo cais lub corrosive nruab nrab los ntawm cov hlau hlau matrix thiab ua raws li lub cev thaiv. Ntxiv mus, cov yeeb yaj kiab tiv thaiv no kuj tseem tuaj yeem kho tus kheej rau qee yam. Yog tias cov yeeb yaj kiab tiv thaiv yog qee qhov puas, cov neeg nyob ib puag ncig cov oxygen kom hloov cov yeeb yaj kiab tiv thaiv, yog qhov kev tiv thaiv nws txoj haujlwm tiv thaiv.
Cov nyhuv ntawm kev hloov microstructure
Tooj liab hauv cam khwb cia hlau tuaj yeem hloov kho micrrix lub koom haum, yog li cuam tshuam nws corrosion tsis kam. Thaum tooj liab dissolves nyob rau hauv ferrite matrix ntawm cov hlau ua kom cov hlau los ua cov kev daws teeb meem, nws ua rau muaj lattice distortion. Qhov kev ua yeeb yam no muaj peev xwm txo cov kev ua si ntawm cov hlau atoms thiab tsis muaj zog ntawm cov hlau atoms hauv cov xov xwm corrosive. Piv txwv li, hauv acidic media, muaj cov tooj liab hloov cov kev faib tawm ntawm cov hluav taws xob atoms, yog qhov nyuaj rau cov mids, yog li txo cov hlau corrosion.
Tooj liab kuj tseem tuaj yeem kho cov graphite nodules nyob rau hauv pawg hlau thiab ua rau kev faib ntawm graphite nonges ntau yam zoo li qub. Thaum lub sij hawm corrosion, tus qauv matrix nyob ib ncig ntawm graphite nodules yog nquag mus rau electrochemical corrosion. Uniformly faib cov kab mob nodules tuaj yeem txo qhov tshwm sim ntawm kev faib tawm hauv zos tuaj yeem ua rau cov kev faib tawm hauv nroog tuaj yeem tshwm sim los ntawm kev ua kom huv si hauv corrosion.
Synergy nrog lwm cov ntsiab lus
Thaum lwm cov ntsiab lus qub (xws li npib tsib xee, chromium, thiab lwm yam) Tooj tuaj yeem ua haujlwm rau cov khoom lag luam no txhawm rau txhim kho corrosion tsis kam. Piv txwv li, txij li npib tsib leeg tuaj yeem txhim kho cov hlau corrosion, tooj liab thiab npib nyiaj loj tuaj yeem tsim cov khoom siv xeb ntau ruaj khov. Thaum sib xyaw ua ke, cov yeeb yaj kiab tiv thaiv lawv tsim rau saum npoo ntawm cov hlau du ntau yog cov yooj yim thiab ruaj khov. Nyob rau hauv ib puag ncig muaj corrosive media xws li chlorive media, no synergistic effect tuaj yeem ua kom zoo tsis muaj qhov tshwm sim ntawm pitting thiab compevice corrosion.
Ntxiv mus, tooj liab thiab chromium kuj muaj cov nyhuv syngistic. Chromium tuaj yeem tsim zaj duab xis tiv thaiv ntawm chromium oxide (cr₂o₃) nyob rau saum npoo ntawm cov hlau du tuaj yeem txhim kho kev ruaj ntseg ntawm cov yeeb yaj kiab tiv thaiv no. Ib qho ntxiv, tooj liab tuaj yeem txhawb nqa cov kev xa tawm ntawm cov chromium rau qee yam, yog li ntawd cov corrosion tsis kam ntawm tag nrho cov hlau saum npoo yog txhim kho. Nyob rau hauv ib puag ncig muaj huab cua sov, cov nyhuv tshaj plaws yog pom tseeb, uas tuaj yeem tiv thaiv kev ua kom haum rau corrosion xws li oxidation thiab sulfidation ntawm cov hlau corros.
Cov nyhuv ntawm cov ntsiab lus ntawm Corrosion Kuj
Tus nqi tsim nyog ntawm tooj liab cov ntsiab lus muaj qhov cuam tshuam tseem ceeb ntawm kev xeb tawm tsam ntawm cov hlau cam. Feem ntau hais lus, thaum cov ntsiab lus tooj liab yog nruab nrab ntawm {{0%, cov hlau corrosion ntawm cam khwb cia hlau yuav nce ntxiv nrog cov ntsiab lus tooj liab. Tsis pub dhau qhov ntau no, tooj liab tuaj yeem koom tes nrog kev tsim cov yeeb yaj kiab tiv thaiv thiab muaj qhov cuam tshuam zoo rau ntawm matrix. Piv txwv li, hauv ib puag ncig marine, cov corrosion kuj ntawm cam khwb cia hlau uas muaj tooj liab muaj li ntawm cov hlau uas tsis muaj li 30% mus rau 50%.
Txawm li cas los xij, thaum cov ntsiab lus tooj liab dhau lawm, nws yuav muaj cov kev cuam tshuam tsis zoo ntawm corrosion tsis kam. Cov ntsiab lus tooj liab dhau yuav ua rau qee qhov tooj liab-nplua nuj los ua cov hlau corrosion, uas tuaj yeem ua raws li cov txheej txheem corrosion thaum lub nroog corrosion thiab nrawm qhov tshwm sim ntawm kev corrosion. Ntxiv mus, ntau cov ntsiab lus tooj liab kuj tseem tuaj yeem cuam tshuam lwm cov khoom ntawm cov hlau uas tsis sib xws, uas tsis muaj kev cuam tshuam nrog nws corrosion tsis kam nyob rau hauv cov ntawv thov kev siv.
Dalian Aiseno ElectromeCheatory Electrome ElectromeChanical Equipment Co., Ltd. tau tsom mus rau lub Kaum Hlis 2016.
Nyob rau hauv lub tshav teb ntawm post-casting tu, lub tuam txhab muab cov khoom siv sib txawv. Piv txwv li, cov chaw nres tsheb twj hydraulic nrog lub zog muaj zog tuaj yeem muab lub zog rau lwm yam khoom siv. Lub breaker wedge thiab hnyav degating rauj yuav sai sai cais lub taub hau. Ntxiv mus, tus runer runner breaker tuaj yeem tsoo tus nqi rov qab, uas pab nrog kev tsim cov lag luam.
