Corrosion behaviour of Fe-based austenitic and Ni-based alloys in Wet CO2 gas with and without chloride deposits at 650 °C
Source abstract
Abstract
The corrosion behaviour of Fe-25Cr-20Ni, 310SS, Ni-25Cr, and Ni-25Cr-2Mn-1Si (all in wt%) with and without NaCl-KCl deposits in Ar-60%CO 2-20%H 2 O gas at 650 °C was investigated. Without salt deposits, both Fe-25Cr-20Ni and Ni-25Cr formed thick internal oxidation zones (IOZs) and external oxide scales. The addition of Si+Mn significantly improved the corrosion resistance in this case. The presence of NaCl-KCl deposits accelerated the corrosion, forming porous external oxide scales and IOZs, with no protective effect provided by Si+Mn alloying. The effect of chlorides was discussed in terms of oxide volatilization and the accelerated reaction of chlorine with oxides in the IOZs.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Advanced materials and composites
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