Solid-Solution Effect on Grain Boundary Character Distribution and Corrosion Resistance of 304 Stainless Steel

 Yanan Zhao Yanan Zhao , Yinqi Cong Yinqi Cong , Xiaoyu Zhu Xiaoyu Zhu , Wenying Liu Wenying Liu , Yang Liu Yang Liu , Dongyin Wang Dongyin Wang
Российский электрохимический журнал
Abstract / Full Text

In this study, we focus on the effect of solid-solution treatment on the susceptibility to intergranular corrosion and electrochemical corrosion of 304 stainless steel. The results show that with the solution temperature rises, the grain size of the steel increases and the intergranular corrosion tendency decreases. After corrosion, it exhibits a step microstructure and grooves at grain boundary on surface of the steel. The corrosion resistance of the steel can be improved by means of properly increasing the solution temperature and choosing a faster cooling way such as water quenching. Besides, with the nitric acid solution temperature rises, the corrosion current (Icorr) increases and the pitting corrosion potential decreases, in which pitting corrosion is more likely to happen. Moreover, in high concentration of nitric acid, a stability passive film can be formed on the surface of 304 stainless steel, which prevents the reaction of the anode, lowers the corrosion, and shows a better anti-corrosive ability.

Author information
  • College of Science, Shenyang University of Chemical Technology, 110142, Shenyang, Liaoning, China

    Yanan Zhao, Yinqi Cong & Xiaoyu Zhu

  • Shenyang Blower Works Group Corporation, 110142, Shenyang, Liaoning, China

    Wenying Liu, Yang Liu & Dongyin Wang

  • Advanced Manufacturing Institute of Polymer Industry, Shenyang University of Chemical Technology, 110142, Shenyang, Liaoning, China

    Yanan Zhao

  1. Song, L., The corrosion strength’s treatment of austenite stainless steel, Coal Mine Mach., 2003, vol. 12, p. 62.
  2. Jin, F., 400°C aging on sensitization behavior of 304 stainless steel, Pressure Vessel Technol., 2013, vol. 30, p. 24.
  3. Feng, X., Chen, F., and Chen, Y., Effect of sensitizing treatment on intergranular corrosion of 304 stainless steel plate, Heat Treat. Technol. Equip., 2017, vol. 38, p. 15.
  4. Zhang, Y., Dai, S., and Yu, Z., Influence of heat-treatment on the microstructure and properties of 316L stainless steel, South. Met., 2007, vol. 1, p. 31.
  5. Shi, Y., Yan, R., and Zhao, R., Heat treatment process of 304 austenitic stainless steel, Sci. Technol. Eng., 2011, vol. 11, p. 5910.
  6. Ding, F., Yang, C., and Zhang, X., Optimum solution treatment process of 304N stainless steel, Heat Treat. Met., 2017, vol. 42, p. 127.
  7. ASTM A262-15: Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels, ASTM Int., 2015.
  8. Marcus, P., Corrosion Mechanisms in Theory and Practice, New York: CRC Press, 2002.
  9. Qiao, Y., Zou, N., and Li, J., Effect of solution temperature on microsture of 2205 stainless steel welded joints, Mater. Sci. Forum, 2010, vol. 658, p. 432.
  10. Sun, Y., Liu, G., Wang, L., and Qian, W., Influence of solution annealing on intergranular corrosion resistance of 316L stainless steel, Corros. Sci. Protect. Technol., 2014, vol. 26, p. 228.