Abstract

AbstractThe influence of cast structure on the magnitude of the anodic attack has been studied for six lead base materials.A comparison of the losses of weight of series of grid samples corresponding to the testing of two well differentiated cast structures for each material (a “coarse” structure and a “fine” one) shows that there is often a significant influence of the structure on the corrosion. The direction of the effect depends on the type of alloy tested. In some cases the “coarse” structure motivates a higher attack than the “fine” structure; in other cases, the opposite effect is encountered.Finally, a theoretical justification is given of the principal facts observed. This is chiefly based on an analysis of the possibilities of selective attack of the material and disintegration of structural units.

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