CORROSION PREVENTION METHOD OF CAST IRON PIPE

摘要

PROBLEM TO BE SOLVED: To form a stable corrosion prevention layer even on a part where it is easily left unpainted due to irregularity of ditches and protrusions such as on a surface of a cast iron pipe, and where lack of preparation process (blast process) is likely to occur.SOLUTION: Zinc metal with excellent corrosion prevention property is fused and blasted on a surface of the cast iron pipe, and then, the corrosion prevention layer is formed by spray paint overcoating of zinc rich paint. Thereby, making use of advantages of different two methods of spray coating and painting, the zinc corrosion prevention layer with excellent rust prevention property is stably formed.