Gravimetric Corrosion Tests and Surface Analysis of SUS 310S in Model Seawater
Published: 2022-01-14
Page: 22-30
Issue: 2022 - Volume 5 [Issue 1]
Md. Saiful Islam *
Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh and Graduate School of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
Most. Sabina Yasmin
Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh.
Masatoshi Sakairi
Faculty of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
*Author to whom correspondence should be addressed.
Abstract
The corrosion behaviors of SUS 310S in model seawater with different metal cations have been investigated by gravimetric tests and surface analysis. Different corrosion rates were observed in different solutions by the kinds of metal cations, and Zn2+ containing solution showed the lowest corrosion rate among used solutions. SEM observations showed the pits on the surface that were different from each other. White pits were observed on the specimen immersed in the Zn2+ containing solution. X-ray photoelectron spectroscopic results showed the presence of Zn2+ and Al3+ on the specimen immersed in the corresponding solution. Metal cations that have large X showed the tendency to form a fence layer on the specimen surface. Metal dissolution as well as chloride ions attacks were inhibited by the layer of metal cations with large X.
Keywords: Gravimetric test, SUS 310S, corrosion, seawater, SEM, XPS