Effect of TIG Welding on Corrosion Resistance of Zirconium R60702

Protection and the nonequilibrium crystallization of TIG welding on Zr R60702 were applied to prepare the specimens of welded joints for metallographic observation and corrosion potential determination.Microstructures of the specimens were analyzed with a high power metallographic microscope.Polarization curves of the specimens were measured for evaluation of the corrosion properties.The microstructure and second phase distribution of Zr R60702 were studied on their influence to the corrosion properties.The results indicate that the corrosion resistance properties of the HAZ is lower.