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抄録
to study the cavitation erosion behavior of interface and base metal for platings, magneto-strictive erosion tests were carried out in a 3% NaCl solution using a 0.18% carbon steel specimen plated thinly with zinc, tin, chromium or nickel. When erosion attack extends to the interface between the plating and base metal, chromium or nickel plating which is more noble than base metal forms a rough surface because of the difference of hardness and electrochemical corrosion at the interface, even though it shows high erosion resistance in itself. Thus the protective effects of thin and hard plating disappears immediately. However, the platings of metal such as zinc or tin become effective because of the electrochemical reactions of the plating layer remaining on the surface outside the eroded area.
