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In oil and gas industrial environments, H2S gas is one of the corrosive species which should be a main  concern  in  designing  infrastructure  made  of  carbon  steel.  Combination  between  the corrosive  environment  and  stress  condition  will  cause  degradation  of  carbon  steel  increase unpredictably due to their simultaneous effects. This  paper will design a model that involves electrochemical and mechanical theories to study crack growth rate under presence of H2S gas. Combination  crack  and  corrosion  propagation  of  carbon  steel,  with  different   hydrogen concentration has been investigated. The results indicated that high concentration of hydrogen ions  showed a higher crack propagation rate. The comparison between corrosion prediction models and corrosion model developed by researchers used to verify the model accuracy showed a good agreement

Mechanistic model of stress corrosion cracking (scc) of carbon steel in acidic solution with the presence of H2s