Filiform corrosion as a pressure-driven delamination process.

Brau, Fabian; Thouvenel-Romans, Stephanie; Steinbock, Oliver; Cardoso, Silvana S S; Cartwright, Julyan H E · Soft Matter · 2019

basic_science · Level V

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Abstract

Filiform corrosion produces long and narrow trails on various coated metals through the detachment of the coating layer from the substrate. In this work, we present a combined experimental and theoretical analysis of this process with the aim to describe quantitatively the shape of the cross-section, perpendicular to the direction of propagation, of the filaments produced. For this purpose, we introduce a delamination model of filiform corrosion dynamics and show its compatibility with experimental data where the coating thickness has been varied systematically.