Corrosion Properties of Al-modified Austenitic Stainless Steel Prepared by Laser Cladding
The layer of Al-modified austenitic stainless steel was formed by laser cladding with pre-placed FeNiCrAl powder on 304SS surface.No porosity and free of cracks was observed at power density of 31.25 w·s·mm-2.The microstructure of cladded layer was observed by OM (optical microscope) and SEM (scanning electron microscope).Compared with 304 (the substrate),laser cladding FeNiCrA1 layer exhibit excellent pitting resistance in mixed acid solution.Anodic polarization curve indicated that the corrosion potential of laser cladding layer was 70 mV higher than that of 304SS (-345.7 mV),while self-corrosion current density of 304SS was 2.4 times as high as that of laser cladding layer.
austenitic stainless steel laser cladding microstructure polarization curve
ZHANG Jian Bin YU Dong Mei XU Jian Lin
State Key Lab.of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou 730050,China
国际会议
武汉
英文
536-539
2013-06-15（万方平台首次上网日期，不代表论文的发表时间）