船底塗料によるアルミニウム合金の腐食とその防止について

抄録

The use of aluminum alloy as ship hull plate might lead to the necessity of ship bottom paint which does not corrode aluminum. Anti-fouling paint which contains copper, corrodes aluminum by forming local cell which is caused by copper precipitate at the defect of paint film. By the test using analogy of macro corrosion cell of aluminum alloy and copper as the above local cell, it was assured that these corrosion of aluminum alloy can be inhibited by cathodic polarization and that using zinc as a protective metal is most suitable for this purpose. And also it was ascertained that zinc can protect effectively the corrosion of aluminum alloy by ship bottom paint containing copper as a toxic agent.