The electrochemical behavior and passivation properties of 2507 super duplex stainless steel(SDSS)in the hot concentrated seawater with different concentrations at different temperatures are characterized by electroch...The electrochemical behavior and passivation properties of 2507 super duplex stainless steel(SDSS)in the hot concentrated seawater with different concentrations at different temperatures are characterized by electrochemical methods and X-ray photoelectron spectroscopy.The passive film formed on 2507 SDSS belongs to n-type semiconductor and mainly composed of hydroxides and oxides of Fe and Cr under all circumstances.The protectiveness of the passive film decreases with the increase in temperature mainly because of the increase in defect density in the passive film.The corrosion resistance of 2507 decreases with the increase in seawater concentration,and the critical pitting temperature also decreases.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51701102)the Science and Technology Support Plan for Youth Innovation of Colleges in Shandong Province(No.DC2000000891)the Shandong Provincial Key R&D Plan(Nos.2019GHY112050 and 2019GGX104072)。
文摘The electrochemical behavior and passivation properties of 2507 super duplex stainless steel(SDSS)in the hot concentrated seawater with different concentrations at different temperatures are characterized by electrochemical methods and X-ray photoelectron spectroscopy.The passive film formed on 2507 SDSS belongs to n-type semiconductor and mainly composed of hydroxides and oxides of Fe and Cr under all circumstances.The protectiveness of the passive film decreases with the increase in temperature mainly because of the increase in defect density in the passive film.The corrosion resistance of 2507 decreases with the increase in seawater concentration,and the critical pitting temperature also decreases.
