抄録
In recent time, aluminum and its alloy are being made use for the train or the building. In this case, as corrosion resistance of the material to urine is required for inside wall of toillet. we tried the corrosion test extending over one year. The result of our test, 2S 3S and 52S had little corrosion attack, we get the conclusion from our test of this term, which these material will be no trouble to make use of practical use.
