Reveals no corrosion inhibition in aluminium by protocatechuic acid, indicating alternative protective strategies may be needed.
• Protocatechuic acid showed no inhibition of aluminium corrosion in H 3 PO 4 solution. • Electrically neutral protocatechuic acid molecules did not adsorb on aluminium. • Water and phosphate species dominated aluminium surface coverage H 3 PO 4 solution. • MD simulations revealed AlOH intermediates and possible aluminium hydrogenation.
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Kwolek et al. (2026) studied this question.
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