Raws li cov txiaj ntsig ntawm electrochemical hydrogen permeation test, qhov ntau dua cov ntsiab lus carbon thiab qhov ntim feem ntawm carbides hauv cov qauv, qhov me dua qhov diffusion coefficient ntawm hydrogen atoms thiab ntau dua solubility. Raws li cov ntsiab lus carbon nce, qhov kev tiv thaiv rau hydrogen embrittlement kuj txo.

Slow strain rate tensile testing paub tseeb tias qhov siab dua cov ntsiab lus carbon, qhov qis dua qhov kev ntxhov siab corrosion cracking kuj. Raws li qhov sib npaug ntawm qhov ntim ntawm cov carbides, raws li cov tshuaj tiv thaiv txo hydrogen thiab tus nqi ntawm cov tshuaj hydrogen txhaj rau hauv cov qauv nce, cov tshuaj tiv thaiv anodic dissolution yuav tshwm sim, thiab qhov tsim ntawm lub hauv pliaj cheeb tsam kuj yuav nrawm dua.

Thaum cov ntsiab lus carbon nce, carbides yuav precipitate hauv cov hlau. Nyob rau hauv qhov kev txiav txim ntawm electrochemical corrosion tshuaj tiv thaiv, muaj peev xwm ntawm hydrogen embrittlement yuav nce. Txhawm rau kom ntseeg tau tias cov hlau tau zoo heev corrosion kuj thiab hydrogen embrittlement tsis kam, carbide Precipitation thiab ntim feem tswj yog txoj kev tswj tau zoo.

Daim ntawv thov ntawm cov hlau hauv qhov chaw pib muaj qee qhov kev txwv, kuj vim nws qhov txo qis hauv kev tiv thaiv hydrogen embrittlement, uas yog tshwm sim los ntawm aqueous corrosion. Qhov tseeb, qhov no hydrogen embrittlement susceptibility yog ze ze rau cov ntsiab lus carbon, nrog nag lossis daus ntawm hlau carbides (Fe2.4C / Fe3C) nyob rau hauv qis hydrogen overvoltage tej yam kev mob.

Feem ntau, rau cov tshuaj tiv thaiv corrosion hauv cheeb tsam ntawm qhov chaw tshwm sim los ntawm kev ntxhov siab corrosion cracking tshwm sim los yog hydrogen embrittlement phenomenon, cov residual kev nyuaj siab raug tshem tawm los ntawm kev kho cua sov thiab hydrogen ntxiab efficiency yog nce. Nws tsis yog yooj yim los tsim ultra-high-lub zog tsheb hlau nrog ob qho tib si zoo corrosion kuj thiab hydrogen embrittlement kuj.

Raws li cov ntsiab lus carbon nce, qhov txo qis ntawm hydrogen nce, thaum lub hydrogen diffusion tus nqi txo qis. Tus yuam sij rau kev siv cov pa roj carbon nruab nrab lossis cov pa roj carbon siab ua cov khoom siv los yog cov khoom sib kis tau zoo los tswj cov carbide Cheebtsam hauv microstructure..