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| Influence of alloy element and microstructure on corrosion behavior of medium-Mn steel in a simulated marine splash zone |
| LIU Wei，ZHENG Meng-yao，WANG Zhi-lei，LIU Jin，ZHENG Shao-chuan， GAO Xiu-hua |
| （The State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， Liaoning， China） |
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Abstract A new type low-C medium-Mn steel that contained reversed austenite was manufactured by tempering treatment. The microstructure of the reversed transformation austenite was observed. The corrosion behavior of the tested medium-Mn steel in a simulated marine splash zone was investigated by periodic alternate immersion test， and influence of alloy element and microstructure on the corrosion behavior was researched. The results show that Cr as the corrosion resistance element， has the most remarkable corrosion effect. With increasing the corrosion time and in the presence of anti-corrosion elements， Cr may form a barrier to stabilize the corrosion rate and improve the negative effects from Mn. In addition， the microstructure of the tested steel has an effect on the corrosion behavior， and during the corrosion process， the tempered martensite dissolves at first， and the reversed transformation austenite plays a positive role in regulating the corrosion process.
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Received: 15 February 2017
Published: 28 July 2017
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2017, Vol. 52 
