Kuti ive nechokwadi chesimba rakakwirira, kabhoni inofanirawo kuwedzerwa kune simbi, iyo iyo iron carbides inonaya. Kubva pane electrochemical point yekuona, iron carbide inoshanda secathode, ichimhanyisa anodic dissolution reaction yakatenderedza substrate. Kuwedzera kweiyo vhoriyamu chikamu chesimbi carbides mukati meiyo microstructure inonzi zvakare yakaderera hydrogen overvoltage zvimiro zvecarbides.

Pamusoro pesimbi iri nyore kugadzira uye kutora hydrogen. Kana maatomu ehydrogen apinda musimbi, chikamu chehaidhirojeni chinogona kuwedzera, uye pakupedzisira kushorwa kwehydrogen embrittlement yezvinhu kunoderera zvakanyanya.

Iko kuderedzwa kwakakosha kwekupokana kwekuora uye hydrogen embrittlement kushorwa kwesimbi-yakasimba simbi haingokuvadzi zvinhu zvesimbi, asiwo inoderedza zvakanyanya kushandiswa kwesimbi.

Semuenzaniso, kana simbi yemotokari inoratidzwa kune dzakasiyana siyana dzinoparadza nharaunda senge chloride, pasi pechiito chekushushikana, chiitiko chekushungurudzika corrosion cracking (SCC) chingaitika chinokonzeresa kutyisa kwekuchengetedza kwemuviri wemotokari.

Iyo yakakwira iyo kabhoni yemukati, inodzikira iyo hydrogen diffusion coefficient uye yakakwirira kunyungudika kwehydrogen. Nyanzvi Chan yakambotaura kuti kuremara kwakasiyana-siyana kwakadai semvura (senzvimbo dzekuteya maatomu ehydrogen), zvinogona, uye pores zvinoenderana nekabhoni yemukati. Kuwedzera kwekabhoni kuchaita kuti hydrogen diffusion, saka iyo hydrogen diffusion coefficient yakaderera zvakare.

Sezvo kabhoni yemukati ichienderana neiyo hydrogen solubility, iyo yakakura vhoriyamu chikamu checarbides senge hydrogen atomu misungo, iyo diki yehydrogen diffusion coefficient mukati mesimbi, iyo yakakura kunyungudika kwehydrogen, uye hydrogen solubility inewo ruzivo nezve diffusible hydrogen. saka Hydrogen embrittlement susceptibility ndiyo yakanyanya. Nekuwedzera kwekabhoni, iyo diffusion coefficient yeatomu yehydrogen inodzikira uye iyo yepamusoro hydrogen concentration inowedzera, izvo zvinokonzerwa nekudzikira kwehydrogen overvoltage pamusoro pesimbi.