The effect of welding materials on 1Cr18Ni9Ti and 2Cr13 steel welded joints electrochemical properties

By method of TIG, two kinds of welding materials were filled in and under certain welding craft conditions, 1Cr18Ni9Ti and 2Cr13 were welded. The microstructure of two kinds of welded joints were observed and analyzed by OM, SEM. Through seawater immersion test, polarization curves and AC impedance spectroscopy of two kinds of welding joints were obtained. The results show that 2Cr13 and 1Cr18Ni9Ti welded joints are typical columnar crystal, the microstructure is lath martensite + austenite + carbide. The welded joints that filled in 308 and H1Cr21Ni10Mn7Mo welding wires, corrosion resistance has same change rule: Austenite base metal>HAZ near Austenite>welded joint>HAZ near Martensite>Martensite base metal. The every zone contrast of two kinds of welded joint corrosion resistance obtains: the welded joints filled in 308> the welded joints filled in H1Cr21Ni10Mn7Mo.