The effect of yellow sand on the ion dissolution by precipitation from super duralumin and aluminum bronze and the measurement of corrosion current - corrosion potential.

Abstract

In order to examine the effect of yellow sand on the metal dissolution from aluminum bronze sheets and super duralumin boards by precipitation, the artificial corrosion atmospheric exposure test was performed. The dissolution inhibition tendency due to the yellow sand atomizing was observed for aluminum and copper from the super duralumin boards and copper from the aluminum bronze sheets. The corrosion current-corrosion potential was measured, and analyzed assuming the yellow sand as a corrosion inhibitor. For the super duralumin, under the yellow sand atomizing, the dissolution was mainly controlled by a inhibition type cathode reaction. The measured result of the accumulative leaching amount of aluminum and copper was explained by this reaction type. For the aluminum bronze, the dissolution was controlled with an inhibition type or a mixed inhibition type anode reaction, which corresponds to the result of the accumulative leaching amount of copper. The yellow sand is assumed to act as a corrosion inhibitor.