Next Article in Journal
Low Temperature Phase Transformations in Copper-Quenched Ti-44.5Al-8Nb-2.5V Alloy
Next Article in Special Issue
Analysis of Historic Copper Patinas. Influence of Inclusions on Patina Uniformity
Previous Article in Journal
HRTEM Microstructural Characterization of β-WO3 Thin Films Deposited by Reactive RF Magnetron Sputtering
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Materials 2017, 10(2), 199; doi:10.3390/ma10020199

Rust Formation Mechanism on Low Alloy Steels after Exposure Test in High Cl− and High SOx Environmen

Corrosion resistant steel Group, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan
Received: 14 December 2016 / Accepted: 15 February 2017 / Published: 17 February 2017
(This article belongs to the Special Issue Fundamental and Research Frontier of Atmospheric Corrosion)
View Full-Text   |   Download PDF [11488 KB, uploaded 20 February 2017]   |  

Abstract

Exposure tests were performed on low alloy steels in high Cl− and high SOx environment, and the structure of the rust were analyzed by TEM (Transmission Electron Microscopy) and Raman Spectroscopy. In the exposure test site, the concentrations of Cl− and SOx were found to be high, which caused the corrosion of the steels. The conventional weathering steel (SMA: 0.6% Cr-0.4% Cu-Fe) showed higher corrosion resistance as compared to the carbon steel (SM), and Ni bearing steel exhibited the highest one. Raman spectroscopy showed that the inner rust of Ni bearing steel was mainly composed of α-FeOOH and spinel oxides. On the other hand, SMA contained β- and γ-FeOOH in inner rust, which increased the corrosion. TEM showed that nano-scale complex iron oxides containing Ni or Cr were formed in the rust on the low alloy steels, which suppressed the corrosion of steels in high Cl− and high SOx environment. View Full-Text
Keywords: atmospheric corrosion; low alloy steel; rust; Cl−; SOx; nickel; chromium; transmission electron microscopy; Raman spectroscopy atmospheric corrosion; low alloy steel; rust; Cl−; SOx; nickel; chromium; transmission electron microscopy; Raman spectroscopy
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Nishimura, T. Rust Formation Mechanism on Low Alloy Steels after Exposure Test in High Cl− and High SOx Environmen. Materials 2017, 10, 199.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top