Surfactants as corrosion inhibitors for zinc pigment

Abstract

A lamellar zinc pigment reacts in aqueous alkaline media (e.g. water‐borne paints) with the evolution of hydrogen. This corrosion reaction can be inhibited by certain surfactants. The most important structural part of the examined surfactants is the hydrophilic group; only anionic phosphate or phosphonate hydrophilic groups are effective corrosion inhibitors. Surfactants with carboxylate, sulfonate, amphoteric, cationic and non‐ionic hydrophilic groups are ineffective. There seems to be also an influence of the hydrophobic group of the surfactants because a partial ester of phosphoric acid with a fluorinated hydrophobic group was the most effective corrosion inhibitor in this study.

Citation

Müller, B., Schubert, M. and Kinet, G. (1999), "Surfactants as corrosion inhibitors for zinc pigment", Pigment & Resin Technology, Vol. 28 No. 5, pp. 279-282. https://doi.org/10.1108/03699429910294328