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
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
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