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.
NETL
NSTL
万方数据
