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| Corrosion Resistance Research of Low-Nickel Cr-Mn-N Stainless Steel Containing Rare Earth Element La |
| ZHAO Li-ping, QIN Xiang-dou, ZHANG Hui-min, HE Jian-xin |
| College of Material and Metallurgy Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Nei Mongol, China |
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Abstract Low-nickel Cr-Mn-N stainless steel with different content of rare earth La element was the research object, and the electrochemical behavior was studied by electrochemical impedance spectrum and polarization curve in the cyclic immersion corrosion environment. The experimental result shows that rare earth element La can affect the electrode potential of Low-nickel Cr-Mn-N stainless steel. When the content of La element was in the range of 0-0.014%, the amount of rare earth to be added was more, the substrate electrode potential of the stainless steel was higher. When Low-nickel Cr-Mn-N stainless steel contained the 0.004 9% of La element, the corrosion resistance was best in 3.5% NaCl solution for 48 days of simulation of atmospheric corrosion, but the content of La element exceeded a certain range, the corrosion resistance decreased.
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Received: 03 January 2014
Published: 13 October 2014
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2014, Vol. 49 
