Study on Crack Corrosion Sensitivity of Low Alloy Steel in Simulated Aqueous Solution
In view of the corrosion of steel strusture surface and its supporting strusture in an ambient water solution,the crack corrosion experiment,soaking experiment and electrochemical experiment of low alloy steel have been studied in the simulated aqueous solution.The corrosion morphology,corrosion product composition and electrochemical parameters of low alloy steel seamlss sample and crack sample in simulated aqueous solution have been analyzed.The results show that the corrosion of low alloy steel is mainly electrochemical reaction in the simulated aqueous solution.The initial corrosion products of rust layer are Fe(OH)3 and FeOOH products while the corrosion products in middle and later period are Fe3O4.The corrosion of crack sample is weaker than that of seamless sample,and the corrosion in the crack is much weaker than the corrosion outside the crack.Therefore,low alloy steel is not sensitive to crack corrosion in the simulated aqueous solution.