Ghosh, D. and Shukla, A.K. and Mitra, S.K. and Satpati, B. (2016) High-Temperature Corrosion Behavior of Different Regions of Weldment of 2.25Cr-1Mo Steel in SO2 + O2 Atmosphere. Journal of Materials Engineering and Performance, 25 (2). pp. 421-430.

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Abstract

This paper investigates the corrosion behavior of different regions of weldment of 2.25Cr-1Mo steel exposed in mixed oxidation and sulfidation (SO2 + O2) environment up to 500 h at 773 K. Microstructural investigation and characterization of oxide scales are done using SEM, TEM, and XRD. The obtained results infer that heat-affected zone corrodes faster than both base and weld metal. The reaction kinetics follows a parabolic growth rate for all regions. The higher corrosion rate of heat-affected zone is attributed to the formation of Cr23C6 secondary precipitates leading to depletion of protective inner scale of the Cr-rich oxide during welding.

Item Type:	Article
Subjects:	Materials
Depositing User:	Dr. Sarita Ghosh
Date Deposited:	14 Jun 2017 12:57
Last Modified:	14 Jun 2017 12:57
URI:	http://cmeri.csircentral.net/id/eprint/376

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