The dissolution behaviors of corrosion products on 316LN stainless steel(SS)in simulated shutdown acid-reducing water chemistry were investigated.The outer Fe-and Ni-rich corrosion products formed in borated and lithi...The dissolution behaviors of corrosion products on 316LN stainless steel(SS)in simulated shutdown acid-reducing water chemistry were investigated.The outer Fe-and Ni-rich corrosion products formed in borated and lithiated high-temperature water at 300℃ dissolved under the simulated shutdown acid-reducing water chemistry.NiFe_(2)O_(4)began to dissolve at the initial stage of boration,but the dissolution of Fe3O4 mainly occurred at the low-temperature stage in shutdown acid-reducing phase.Low pH value and low-temperature conditions are conducive to the dissolution of the outer Fe-rich oxides.The potential-pH(E-pH)diagrams and solubility curves of spinel oxides at different temperatures were calculated.The possible dissolution mechanism of corrosion products was discussed.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52171085,52371083)the Natural Science Foundation of Liaoning Province(No.2024-MSBA-76)+2 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA0410000)the Xingliao Talent Plan of Liaoning Province(No.XLYC2202025)the CNNC Science Fund for Talented Young Scholars.
文摘The dissolution behaviors of corrosion products on 316LN stainless steel(SS)in simulated shutdown acid-reducing water chemistry were investigated.The outer Fe-and Ni-rich corrosion products formed in borated and lithiated high-temperature water at 300℃ dissolved under the simulated shutdown acid-reducing water chemistry.NiFe_(2)O_(4)began to dissolve at the initial stage of boration,but the dissolution of Fe3O4 mainly occurred at the low-temperature stage in shutdown acid-reducing phase.Low pH value and low-temperature conditions are conducive to the dissolution of the outer Fe-rich oxides.The potential-pH(E-pH)diagrams and solubility curves of spinel oxides at different temperatures were calculated.The possible dissolution mechanism of corrosion products was discussed.
