AWWA DSS71301

AWWA DSS71301 The Effect of Corrosion Inhibitors on Pipe Surface Roughness

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

MacNevin, David; Stone, Erica; Duranceau, Steven; Taylor, James

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This poster paper presents a study of corrosion inhibitor addition to influence the impact of scale formation potential and corrosivity on pipe surface roughness. Experimental methods included: multiple source waters; corrosion inhibitors consisting of blended poly/orthophosphate, sodium orthophosphate, zinc orthosphosphate, and sodium silicate; pH elevation; roughness coupons incubated in PVC pipe cradles at the end of each pilot distribution system; and, new metal corrosion coupons incubated in separate electrochemical noise cradles. Topics presented include: measurement of surface roughness; sample scans; typical surface roughness and appearance of pipe materials before and after incubation; results; recommendations; and, conclusions.

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