抄録
We tried comparative test of many anticorrosive methods for iron and steel by salt spraying and wheathering, and found that, in the case of non-painting, the iron and steel which were treated by “Zinc plating- chromate treating-oxy dizing” method was superior and that in the case of painting, “Zinc plating-phosphate treating” method, “Zinc plating-chromate treating” method, and “Zinc plating” were nearly as good as “Zinc plating-chromate treating-oxydizing” method.