KAGAKU KOGAKU RONBUNSHU
Online ISSN : 1349-9203
Print ISSN : 0386-216X
ISSN-L : 0386-216X
Effect of Corrosion on Cavitation Erosion
Ken TsudaYoshitada Suezawa
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1975 Volume 1 Issue 2 Pages 213-218

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Abstract

The effect of corrosion on cavitation erosion was investigated by using the magnetostrictive method in HCl solutions ranging in pH from 0.5 to 4.
The cavitation damage was very severe under corrosive environment. It is shown that this is principally due to the deterioration of material surface, which becomes very brittle by the action of corrosion.
The effect of pH of test liquid on weight loss of cavitation erosion was very similar to the behavior of pure corrosion, that is, weight loss increased rapidly at pH=43, and progressively decreased with increasing acidity above pH≈2. This behavior can be explained by the film of corrosion products and the adsorption of Cl-.
From these results a conventional equation, by which it was possible to estimate the weight loss by cavitation erosion under corrosive environment from that of pure corrosion and erosion, is presented.

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