Facile constructing of interlocking structure for improving anti-corrosion performance of adenine film on copper

A nanometer-thick adenine (Ade/NaClO) film with interlocking structure was successfully prepared by regulating the micro-etching process of sodium hypochlorite and the adsorption process of adenine. Compared to single adenine film, the compactness, adhesion and anti-corrosion performance of Ade/NaClO film were obviously improved. Electrochemical tests demonstrated that the corrosion protection efficiency was improved from 85.8 % to 98.2 % and exhibited self-strengthen anti-corrosion performance. In-situ Raman spectroscopy indicated that the oxidative etching effect of NaClO played an important role in the formation of the film. The strategy proposed in this study exhibits guiding significance for improving the performance of conversion films on metal.