Polyurethane coating with synergistic anticorrosion effect

A new paper presents a stretchable and self-healing polyurethane coating with a synergistic anticorrosion effect for the corrosion protection of stainless steels.

The obtained composite coating could achieve efficient self-healing behavior under sunlight.  Image source: Broesis - Pixabay (symbol image).

Introduction of inorganic fillers into organic coatings can be significant for enhancing mechanical properties and corrosion protection. Scientists now utilised the barrier function of the laminar structure (MXene, Ti3C2) and the inhibition property of the corrosion inhibitor (CeO2) to prepare a MXene/CeO2 polyurethane composite coatings and investigated the corrosion protection performance in 3.5 wt% NaCl solution.

Self-healing behavior under sunlight

Benefiting from the “labyrinth effect” of MXene and the inhibition effect of CeO2, the composite coating exhibits excellent corrosion resistance. What’s more, the researchers introduced the DA bonds into the coating to endow it with self-healing property. The results demonstrated that the obtained composite coating could achieve efficient self-healing behavior under sunlight. Its mechanical properties and anti-corrosion properties were basically unaffected after self-healing. As the researchers point out, the strategy presents a new approach to protection of coating for metal substrates and provides the basis for a multi-mechanism synergistic approach to corrosion protection.

The study has been published in Progress in Organic Coatings, Volume 164, March 2022.

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