Abstract
Among a wide variety of alternative water resources, reclaimed water from waste-water has drawn much attention, as it is considered a stable water resource to be substituted for agricultural, industrial, recreational, and public water. This study aimed to compare and evaluate the effects of tap water and reclaimed water on the corrosion of the inner surface of pipes. The investigated pipes included GSP (Galvanized Steel Pipe), CIP (Cast Iron Pipe), STSP (Stainless Steel Pipe), and PVCP (Polyvinyl Chloride Pipe). Assessment of corrosion impact on the different materials of pipes was conducted by analyzing the corrosion accelerators and inhibitors related to the characteristics of reclaimed water. Reclaimed water with higher ionic content showed a faster corrosion rate than tap water because corrosion accelerators have more of an effect on pipe corrosion than do corrosion inhibitors. In terms of pipe materials, the corrosion rate was fastest in CIP, followed by GSP, and STSP; PVCP exhibited no electrochemical corrosion.
Highlights
Due to the rapid changes in climate and the recognition of the importance of water, the acquisition of alternative water resources has become an important part of research
As for the test devices, the study selected cast iron pipes (CIPs), stainless steel pipes (STSPs), polyvinyl chloride pipes (PVCP), as well as galvanized steel pipes (GSPs) as these are usually used in the reclaimed water supply network in Korea
While this study focused on four-pipe materials—STSP, PVCP, CIP, and GSP—it removed PVCP, non-metal material, from the calculation of the corrosion rate as it poses no risk of corrosion
Summary
Due to the rapid changes in climate and the recognition of the importance of water, the acquisition of alternative water resources has become an important part of research. Among a wide variety of alternative water resources, treated wastewater draws much attention, as it is considered a stable resource for substituting the agricultural, industrial, recreational, and public water, thanks to its good water quality and the amount of discharge that can be reliably predicted. After the advanced wastewater treatment process, the treated wastewater offers great potential for use. This is a stable alternative water resource, and as such, much attention has been paid to the research on its applicability as an alternative water resource
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