Effect of Mn additions on the corrosion behaviour of TWIP Fe-Mn-Al-Si austenitic steel in chloride solution

•Corrosion behaviour of high-Mn austenitic twinning-induced plasticity (TWIP) steel•Effect of manganese additions on the corrosion behaviour of TWIP steel revealed higher corrosion rate as Mn content increases.•CPP and EIS results indicate a lower corrosion resistance as Mn content increases.•Micros...

Full description

Saved in:
Bibliographic Details
Published in:Corrosion science 2019-07, Vol.154, p.246-253
Main Authors: Fajardo, S., Llorente, I., Jiménez, J.A., Bastidas, J.M., Bastidas, D.M.
Format: Article
Language:English
Subjects:
Aluminum oxide
Austenitic stainless steels
Corrosion
Corrosion effects
Corrosion resistance
Corrosion resistant steels
Corrosion tests
EIS
Iron
Manganese
Manganese dioxide
Polarization curves
Protective coatings
Silicon steels
TWIP steel
TWIP steels
XPS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Corrosion behaviour of high-Mn austenitic twinning-induced plasticity (TWIP) steel•Effect of manganese additions on the corrosion behaviour of TWIP steel revealed higher corrosion rate as Mn content increases.•CPP and EIS results indicate a lower corrosion resistance as Mn content increases.•Microstructure inspections by optical, SEM and EDX analysis and angle resolved XPS surface analysis.•. Corrosion of TWIP austenitic steels Fe-Mn-3Al-3Si was studied using polarization curves, EIS tests and XPS. Results indicated that increased concentrations of Mn were detrimental to its corrosion resistance. XPS study revealed that pseudo-protective oxide layer was composed of FeO, Fe2O3, FeOOH, Al2O3, MnO and MnO2. Enrichment of Mn oxides in the outermost oxide layer was found as Mn increased in the TWIP steel bulk along with a decrease in Fe oxides. The increased corrosion susceptibility exhibited with the concentration of Mn in the alloys was associated with the greater contribution of the less protective Mn oxide in the surface film.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2019.04.026