Corrosion behavior of 201 and 316 stainless steel in methanesulfonic acid
The corrosion behavior and mechanism of 201 and 316 stainless steel in methanesulfonic acid solution is studied by potentiodynamic,electrochemical impedance spectroscopy,X-ray electron spectroscopy and immersion tests. The results show that 316 stainless steel has high corrosion resistance in methanesulfonic acid solution,while 201 stainless steel has poor corrosion resistance under open-circuit potential conditions and high corrosion resistance only when the solution has strong oxidizing conditions. The passivation film formed by 201 stainless steel at open circuit potential has a porous structure with poor corrosion protection. When the corrosion potential is increased,the passivation layer formed on 201 stainless steel transfers from porous to compact structure to improve its corrosion resistance. The passive film formed on 316 stainless steel is compact with high corrosion resistance. 316 stainless steel can be used as methanesulfonic acid storage and leaching stirring paddles,while 201 stainless steel is not suitable for these applications.
stainless steelcorrosionmethanesulfonic acidpassive films
万方数据
维普
