AWWA WQTC71603

This powerpoint presentation presents study goals that included: determine a novel approach for characterizing the early stages of corrosion; attempt to understand the mechanisms of surface corrosion on copper; and, examine the effects of inhibitors, i.e orthophosphate, on copper corrosion. Experimental approach included the following: pieces of pure copper were cut into 1 x 1 in² sections; water conditions for the test solutions were 120 mg/L sulfate, 3 mg/L Cl₂, 10 mg/L DIC, 60 mg/L chloride and 6 mg/L orthophosphate; pH was controlled at 6.5, 7, 8 and 9 with coupons suspended in stagnated test water for 6 and 24 hrs; and, after samples were dried, images were acquired in air with tapping-mode AFM.