In situ mildly synthesized CuZnAl LDHs nanofilm with long-lasting corrosion resistance and self-healing properties induced by corrosive Cl– ions

A smart means to achieve the harmless treatment of corrosive Cl – have been proposed for protecting brass. In this method, intelligent self-healing nanofilms based on the interlayer anion exchange properties of LDHs in situ grow on brass surfaces. The Cl – ions replace the BTA – loaded between LDHs interlayers to induce self-healing, as the binding energy of Cl – is lower than that of BTA – , obtained from theoretical calculations. The simultaneous application of electrochemistry and digital holography technologies confirmed that the constructed film has high instantaneous corrosion inhibition efficiency (99.9 %), long-lasting corrosion resistance, and self-healing ability (50 days).