Influence of Surface Gas-Phase Earth Permeation Plus Laser Melting Solidification on Microstructure and Corrosion Resistance of Pure Iron

The samples of pure Fe were treated by surface gas-phase RE permeation plus laser melting solidification (LMS). The microstructures were observed by Scanning Electron Microscope (SEM) and X-ray Photoelectron Spectroscopy (XPS), meanwhile the corrosion resistance was investigated by electrochemical impedance spectroscopy (EIS) and anedic polarization. The results show that this treatment can remarkably improve the density and uniformity of microstructure, and enhance corrosion resistance of the pure Fe surface.