Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2017;6:203-12 DOI: 10.1016/j.jmrt.2016.11.001
Original Article
Study of the corrosion behaviour of S32101 duplex and 410 martensitic stainless steel for application in oil refinery distillation systems
Roland T. Lotoa,b,
a Department of Mechanical Engineering, Covenant University, Ota, Nigeria
b Department of Chemical, Metallurgical & Materials Engineering, Tshwane University of Technology, Pretoria, South Africa
Received 03 August 2016, Accepted 10 November 2016
Abstract

The corrosion behaviour of S32101 duplex and 410 martensitic stainless steel was studied through weight loss and potentiodynamic polarization in 1–6M HCl solutions. Results show that S32101 steel has significantly lower corrosion rates than 410 steel from both tests at all concentrations with highest values of 0.04586mm/y and 0.234mm/y in comparison to martensitic steel with corrosion rates of 0.827mm/y and 19.84mm/y at 6M HCl concentration. Micrographs from SEM and EDS analyses showed a less corroded morphology for S32101 steel with fewer pits and slight depletion in the percentage composition of chromium and other alloying elements.

Keywords
Corrosion, Duplex, Martensitic, Hydrochloric, Steel
J Mater Res Technol 2017;6:203-12 DOI: 10.1016/j.jmrt.2016.11.001