Abstract
High temperature chlorine corrosion tests were performed on several stainless steels, which were 622,316, A59,686, 2#825, and 3#825. After corrosion under 70N2-2CO2-1O2-0.2HCl oxidizing gaseous environment at 800°C for 120 h, the corrosion dynamics of alloys were obtained, which showed the ability of alloys’ high temperature chlorine corrosion resistance. The corrosion resistance sequence from high to low was A59>686>622> 3#825>2#825>316. This order is consistent with the Mo element content in the alloy. SEM/EDS analysis was used to observe the surface and cross-section morphology of the corroded samples. Alloys with high chlorine induced corrosion resistance formed Cr2O3 oxide layers on the surfaces of the samples, such as 622,686 and A59. Iron oxides formed alloys, such as 316 and 2#825, had lower corrosion resistance, because of the loose and porous oxides, which had very high vapor pressure. The formation of TiO2 could also enhance the corrosion resistance.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
