Anticorrosive performance and corrosion mechanisms of Zn–Mn‐coated steel - Université de Lorraine Access content directly
Journal Articles Materials and Corrosion / Werkstoffe und Korrosion Year : 2022

Anticorrosive performance and corrosion mechanisms of Zn–Mn‐coated steel

Abstract

The anticorrosive performance of pulse electrodeposited Zn–Mn deposits was investigated according to the salt spray test DIN EN ISO 9227, commonly used in the automotive industry. A comprehensive analysis of the corrosion products was conducted on the surface and cross-sections via x-ray diffraction and scanning electron microscopy to define the corrosion mechanisms involved. The results revealed a significant enhancement of the anticorrosive performance of Zn–Mn deposits over commercial Zn through a complex corrosion mechanism. The protective coating evolves continuously with exposition time. A preferential dissolution of Mn is observed leading to the formation of a compact layer of zinc hydroxychloride. Moreover, an overlayer of manganese oxide and zinc oxide is highlighted at prolonged exposures due to an increase in interface pH.
No file

Dates and versions

hal-03964101 , version 1 (30-01-2023)

Identifiers

Cite

Nicolas Stein, Florian Claudel, Nathalie Allain, Albert Tidu, Damien Close. Anticorrosive performance and corrosion mechanisms of Zn–Mn‐coated steel. Materials and Corrosion / Werkstoffe und Korrosion, 2022, ⟨10.1002/maco.202213473⟩. ⟨hal-03964101⟩
20 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More