The influence of depassivating element on the performance of aluminium anodes
Abstract
Abstract
The corrosion behaviour of ternary aluminium alloy sacrificial anodes with small amount addition of tin as depassivating element in natural seawater was studied by means of conventional DC electrochemical measurements. Metallurgical microscope was employed in order to observe the changing of microstructure caused by tin present in ternary alloys. The relationship between microstructure and electrochemical results was examined and particular attention paid to the cause of the electrochemical efficiency of anode performance. The results indicate that the proper precipitates uniformly distributed of tin are influence on improving electrochemical performance of alumnium alloy anode.
Abstrak
Tingkah karat anod aloi aluminium ternary pengorbanan dengan sedikit penambahan timah sebagai unsur depassivating dalam air laut semula jadi telah dikaji dengan cara pengukuran elektrokimia DC konvensional. Mikroskop metalurgi digunakan untuk memerhatikan perubahan mikrostruktur yang disebabkan oleh timah yang terdapat dalam aloi ternary. Hubungan antara hasil mikro dan elektrokimia diperiksa dan perhatian khusus diberikan kepada punca kecekapan elektrokimia prestasi anod. Hasilnya menunjukkan bahawa yang tepat mereplikasi secara seragam timah berpengaruh terhadap peningkatan prestasi elektrokimia anod aloi alumnium.
