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Self-strengthening phytic acid micelle(PAM)-Zn complex film fabricated on cold rolled steel (CRS) for corrosion protection

Ru Yan,Xiao Zhang,Xiang Gao,Wei He,Houyi Ma

PAM formed by self-organization can be considered as nanocontainers of phytic acid (PA) molecules and used for the corrosion protection of metal materials. Herein, self-strengthening PAM-Zn conversion films were successfully constructed on CRS substrate by a simple dipping method. The highest protection efficiency of PAM-Zn films was 81.0 % and was further increased beyond 90 % after immersion in NaCl solution. The immersion treatment in NaCl solution not only promoted the formation of more P O 4 3 − and PAM-Zn complex, but also changed the surface microstructure and increased the film thickness and compactness, thereby leading to the great enhancement of anti-corrosion performance.