Qhov sib txawv tseem ceeb ntawm hydrogen embrittlement thiab kev ntxhov siab corrosion cracking yog tias hydrogen embrittlement tshwm sim vim corrosion los ntawm acids xws li ntub hydrogen sulfide thiab hydrofluoric acid, whereas kev nyuaj siab corrosion tawg tshwm sim vim lub zog tensile kev nyuaj siab thiab corrosive. ib puag ncig.
Hydrogen embrittlement tseem hu ua hydrogen-pab cracking lossis hydrogen-induced cracking. Cov txheej txheem no tseem ceeb heev hauv cov alloys nrog rau cov hlau ntshiab; Txawm li cas los xij, kev ntxhov siab corrosion tawg tsuas yog siv tau rau cov hlau, tsis yog rau cov hlau ntshiab.
Hydrogen Embrittlement yog dab tsi?
Hydrogen embrittlement yog qhov txo qis ntawm cov hlau vim yog absorbed hydrogen. Nws tseem hu ua hydrogen-pab cracking los yog hydrogen-induced cracking. Hydrogen atoms tsawg heev. Yog li ntawd, cov atoms tuaj yeem permeate cov hlau. Thaum nws nqus tau, hydrogen tuaj yeem txo qhov kev ntxhov siab uas yuav tsum tau tsim cov kab nrib pleb hauv cov hlau, uas ua rau embrittlement. Ntxiv mus, hydrogen embrittlement siv qhov chaw tshwj xeeb tshaj plaws hauv cov hlau, hlau, npib tsib xee, titanium, cob alt, thiab cov alloys ntawm cov hlau no. Tsis tas li ntawd, tooj liab, txhuas, thiab stainless hlau yog cov hlau uas raug rau hydrogen embrittlement.
Cov ntsiab lus tseem ceeb ntawm qhov xwm txheej ntawm hydrogen embrittlement tau paub txij li xyoo 19 thxyoo pua. Nws tuaj yeem ua kom siab tshaj plaws ntawm qhov ntsuas kub uas nyob ib puag ncig ntawm chav tsev kub hauv cov hlau, thiab cov hlau feem ntau muaj kev tiv thaiv zoo rau cov txheej txheem hydrogen embrittlement ntawm qhov kub siab tshaj 150 degrees Celsius. Cov txheej txheem no tseem xav kom muaj ob qho tib si atomic hydrogen thiab mechanical stress los txhawb kev loj hlob tawg. Txawm li cas los xij, qhov kev ntxhov siab no tuaj yeem siv los yog seem. Feem ntau, cov ntaub ntawv muaj zog ntau dua yog qhov cuam tshuam rau hydrogen embrittlement. Ntxiv mus, nws tuaj yeem nce ntawm tus nqi qis dua.
Hydrogen embrittlement yog txheej txheem nyuaj uas muaj ntau qhov sib txawv ntawm cov txheej txheem micro-txheej txheem, tab sis tag nrho cov txheej txheem no tsis tas yuav tsum tau ua ib zaug. Cov txheej txheem ntawm hydrogen embrittlement suav nrog kev tsim cov nkig hydrides, tsim cov voids uas ua rau cov npuas siab, txhim kho decohesion ntawm cov chaw sab hauv, thiab cov yas hauv zos ntawm cov lus qhia tawg uas tuaj yeem pab kev nthuav tawm ntawm cov kab nrib pleb.
Kev ntxhov siab Corrosion Cracking yog dab tsi?
Kev ntxhov siab corrosion cracking cuam tshuam nrog kev loj hlob ntawm kev tawg hauv qhov chaw corrosive. Hom kev tawg no tuaj yeem ua rau tsis muaj kev cia siab thiab tam sim ntawd tsis ua haujlwm ntawm ib txwm muaj cov hlau nplaum uas muaj kev ntxhov siab tensile. Qhov no tuaj yeem tshwm sim tshwj xeeb ntawm qhov kub siab.
Ntxiv mus, kev ntxhov siab corrosion tawg yog cov tshuaj lom neeg tshwj xeeb, vim qee cov alloys tuaj yeem raug kev nyuaj siab corrosion tawg tsuas yog thaum raug rau qee qhov chaw tshuaj lom neeg. Qhov chaw tshuaj lom neeg no uas ua rau muaj kev ntxhov siab corrosion tawg rau ib qho tshwj xeeb alloy feem ntau yog ib qho uas tsuas yog me ntsis corrosive rau cov hlau. Cov hlau uas raug kev nyuaj siab corrosion tawg tuaj yeem tshwm ci ntsa iab thiab ci. Qhov no yog vim hais tias lawv tau ntim nrog microscopic tawg. Qhov no tuaj yeem ua rau muaj kev ntxhov siab corrosion tawg nyuaj los kuaj xyuas.
Kev ntxhov siab corrosion tawg feem ntau cuam tshuam rau cov hlau thiab hlau alloys. Ib puag ncig kev ntxhov siab tawg yog qhov sib piv uas cuam tshuam rau lwm yam ntaub ntawv, suav nrog polymers, ceramics, thiab iav.
Qhov txawv ntawm Hydrogen Embrittlement thiab Kev Nyuaj Siab Corrosion Cracking yog dab tsi?
Hydrogen embrittlement thiab kev ntxhov siab corrosion cracking yog ob yam tseem ceeb hauv kev lag luam. Qhov sib txawv tseem ceeb ntawm hydrogen embrittlement thiab kev ntxhov siab corrosion cracking yog tias hydrogen embrittlement tshwm sim vim corrosion los ntawm cov kua qaub xws li ntub hydrogen sulfide thiab hydrofluoric acid, qhov kev ntxhov siab corrosion tshwm sim vim muaj kev ntxhov siab tensile thiab ib puag ncig corrosive.
Cov hauv qab no infographic nthuav tawm qhov sib txawv ntawm hydrogen embrittlement thiab kev ntxhov siab corrosion tawg hauv daim ntawv tabular rau kev sib piv ntawm ib sab.
Summary – Hydrogen Embrittlement vs Stress Corrosion Cracking
Hydrogen embrittlement yog qhov txo qis hauv cov hlau ntawm cov hlau vim yog absorbed hydrogen, thaum kev ntxhov siab corrosion cracking yog kev loj hlob ntawm tawg tsim nyob rau hauv ib puag ncig corrosive. Qhov sib txawv tseem ceeb ntawm hydrogen embrittlement thiab kev ntxhov siab corrosion cracking yog tias hydrogen embrittlement tshwm sim vim corrosion los ntawm acids xws li ntub hydrogen sulfide thiab hydrofluoric acid, whereas kev nyuaj siab corrosion tawg tshwm sim vim muaj zog tensile kev nyuaj siab thiab ib puag ncig corrosive.
