Abstract
Nanosized manganese dioxide was prepared by anodic electro deposition method under standardized experimental conditions. Aluminum-zinc alloy sacrificial anodes incorporated with MnO2 nanoparticles were fabricated for cathodic protection of steel. The physico-chemical properties of anodes were enhanced by uniform dispersion and infiltration of the nano-MnO2 particles into the Al-Zn matrix. Such effective and uniform presence of nano-MnO2 inside the interior mass of the anodes was characterized by electrochemical techniques. The anodes exhibited stable potential in open circuit, small polarization and significant rate of depletion in self-corrosion in the course of galvanic immersion studies. The existence of nanocomposite particles in the anode matrix caused effective destruction of the passive aluminia film, which facilitated enrichment of galvanic performance of anode. The anode had better endurance against biofouling also.
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