The High Temperature Corrosion of 2205 Duplex Stainless Steel with NaCl Deposit

Authors

Fu-fu PENG, Department of Mechanical Engineering,National Taiwan University ofScience and Technology,Taipei,Taiwen,China;
Chaur-jeng WANG, Department of Mechanical Engineering,National Taiwan University ofScience and Technology,Taipei,Taiwen,China;
Yu-chang LIN, Department of Mechanical Engineering,National Taiwan University ofScience and Technology,Taipei,Taiwen,China;

Corresponding Author

Chaur-jeng WANG

Abstract

The objective of this study was to figure out the hot corrosion behavior of 2205 duplex stainless steel(2205 DSS) within the temperature ranges from 550 to 850℃ in the static air condition with 2 mg/cm~(2)NaCl deposit,and in the air atmosphere condition with a constant flow rate of 500 vppm NaCl_((g)),respectively.Experimental results show that the hot corrosion kinetics met the parabolic rate law and the corrosion rate increased constantly with increasing temperature.The scales formed included Fe_(2)O_(3)/Fe_(3)O_(4)/Cr_(2)O_(3) and FeCr_(2)O_(4)from outer layer to inner layer.The sequence of formation is independent of the environment temperature,but the SiO_2 and NiO can be found in the substrate of 850℃specimen.The corrosion sequence in two phase structure of 2205 DSS was not influenced by α and γ phases in the 2 mg/cm~(2)NaCl deposit due to complete corrsion and in the air atmospheres condition with a constant flow rate of 500 vppm NaCl_((g)).In the case of constant flow rate of 500 vppm NaCl_((g)),the corrosion rate in the γ phase was greater than that in the α phase,although the corrosion sequence was not known.

Keywords

Duplex stainless steel, 2205DSS, High-temperature corrosion

DOI Link

https://doi.org/10.61558/2993-074X.1670

Publication Date

2005-11-28

Online Available Date

2005-11-28

Revised Date

2005-11-28

Received Date

2005-11-28

Recommended Citation

Fu-fu PENG, Chaur-jeng WANG, Yu-chang LIN. The High Temperature Corrosion of 2205 Duplex Stainless Steel with NaCl Deposit[J]. Journal of Electrochemistry, 2005 , 11(4): 369-376.
DOI: 10.61558/2993-074X.1670
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss4/3