Abstract
In the new type landfill site system using the steel plate liner, cathodic protection, heavy duty coating and corrosion margin will be used as corrosion prevention methods of steel plates. Corrosion margin should be adopted as a backup prevention method and it is necessary to measure the corrosion rate of steel plate in waste to determine the corrosion margin. In this study, the corrosion rate of an unpainted steel plate was measured and the performance of cathodic protection and various types of heavy duty coating was checked by landfill site exposure examinations. The results showed that both cathodic protection and heavy duty coating were effective for preventing corrosion in waste. The laboratory corrosion examinations for investigating the influence of pH, chloride ion, and dissolved oxygen (DO) were also conducted, because these factors seemed to play important roles in corrosion. It was suggested that DO in water which touches to steelp late has the most significant influence on corrosion.
