Corrosion behavior of mild steel in the condition of H2S in wet/dry cycles was studied by corrosion analysis,corrosion product and morphology analysis and electrochemical measurement.The results show that the initial corrosion products are less,and corrosion rate is proportional to cycle times;with accumulation of more corrosion product,which possibly acts as corrosion barrier,corrosion rate is inversely proportional to cycle times based on comprehensive analysis.The formation of FeS may be a factor responsible for a turning point of corrosion rate.
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