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AWWA ACE71091

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AWWA ACE71091 Effects of Alkalinity on Galvanic Corrosion of Lead Solder in Low Conductivity Waters

Conference Proceeding by American Water Works Association, 11/01/2009

Clark, Brandi; Nguyen, Caroline; Edwards, Marc

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This powerpoint presentation begins by providing a brief overview of galvanic corrosion and the theory of alkalinity mitigatingcorrosion by acting as a buffer or bycontributing to formation of protectivepipe scale. Study objectives were to: reproduce this trend undercontrolled circumstances;determine if there is an "optimally bad"amount of alkalinity; and,examine mechanisms for the trend - pH at anode, chloride concentration at anode, andgalvanic current with conductivity. Part I involved dump and fill jar testing. Part II involved using a electrochemical test cell toexamine conductivity effect. Includes figures.

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 37File Size: 1 file , 1.6 MB