Studies on the Atmospheric Corrosion of Metals and Anti-Corrosive Coatings in Japan (4th Report)

Results of Weathering Test Conducted on Protective Coatings for Two Years

Abstract

Weathering test on protective coatings has been arried out for two years (since April, 1960) at the even sites as mentioned in the 1st report.
The rust-inhibitive pigments examined were: red ead, lead suboxide, lead cyanamide, calcium plumbate, basic lead chromate, metallic lead, zinc chromate, zinc oxide, zinc powder, aluminum powder and iron oxide.
The results showed that steel specimens coated with paints containing red lead, lead suboxide, basic lead chromate and zinc chromate are protected more effectively than those coated with the paint prepared from lead cyanamide, zinc oxide, zinc powder and iron oxide.
The most severe attack was observed in the seashore (Omaezaki) and subtropical districts (Makurazaki).