This study was conducted to investigate the effect on copper corrosion of adding six different
mixtures of orthophosphate and polyphosphate (sodium hexmetaphosphate) to the drinking
water. A no-treatment option was also studied. Using a pilot-scale flow-through apparatus
containing new copper pipes, studies were performed on site at two small Nebraska public water
supplies; both water supplies currently do not treat their water, which comes from deep
groundwater wells. At the end of each study, the copper pipes were removed and the pipe scale
was analyzed using a Scanning Electron Microscope (SEM). It was found that in all cases
orthophosphate reduced copper corrosion and ortho/polyphosphate blends tended to increase
copper corrosion. For all pipes fed phosphate inhibitors, their surfaces appeared brown and shiny
and no phosphates were found on the surfaces. CuO or/and Cu<sub>2</sub>O existed on the surfaces. Includes 19 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 11/15/2004 |
