Comparative Study on Corrosion Behavior of 30CrMnSiA and 30CrMnSiNi2A in Simulated Marine Environment
The artificial seawater immersion experiments simulating the submerged zone of seawater,combined with electrochemical impedance spectroscopy(EIS)test,Potentiodynamic polarization(PDP)test,corrosion products and corrosion surface morphology observation,three-dimensional surface profile and corrosion products analysis,were used to study the corrosion behavior of 30CrMnSiA and 30CrMnSiNi2A for amphibious aircraft landing gear in the simulated marine environment.The results show that:the electrochemical behavior of 30CrMnSiA and 30CrMnSiNi2A steels is similar,the anodic curve exhibits active dissolution characteristics,and the cathodic process is dominated by oxygen reduction reaction.The corrosion products mainly consisted of α-FeOOH,γ-FeOOH,α-Fe2O3 and Fe3O4,Corrosion rate of 30CrMnSiNi2A in the environment of artificial seawater is greater than 30CrMnSiA.At the same time,Ni and Cr elements in high-strength steel can effectively improve the corrosion resistance of materials.
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