Five-year atmospheric corrosion of Cu, Cr and Ni weathering steels in a wide range of environments

By I. Díaz, H. Cano, P. Lopesino, D. de la Fuente, B. Chico, J. L. Jimenez, S. Medina, M. Morcillo. Corrosion Science, 2018

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Abstract This work considers fourteen weathering steels manufactured by adding Cu, Cr and Ni alloying elements to extra mild steel. The steels were exposed for up to 5 years in different atmospheres. The atmospheric corrosion resistance of the steels was evaluated and the rust layers formed were characterised by X-ray diffraction, optical microscopy and scanning electron microscopy. The addition of Ni, particularly at 3.0 wt%, leads to a notable increase in corrosion resistance. The rusts formed contain lepidocrocite, goethite and spinel phases. X-ray diffraction also detected small amounts of kornelite (industrial atmosphere) and akaganeite (marine atmosphere).

Subfields: Civil and Structural Engineering, Materials Chemistry, Metals and Alloys

View Paper: https://www.semanticscholar.org/paper/93b870d7fba27f7feb07333511e39538a4e68cce