The effect of orthophosphate on copper corrosion was studied in pipe rig experiments
according to the German standard DIN 50931-1. Two effects of phosphate on copper
corrosion were noticed: phosphate dosing decreased copper oxidation and resulted in lower
copper concentrations in water; and, phosphate hindered the precipitation of malachite,
which prolonged the existence of copper in water and resulted in higher copper concentration.
As a consequence, orthophosphate can decrease or increase the copper release, depending on
the strength of the two effects. Neither the reduction of cuprosolvency nor the formation of
calciumphosphate are the reasons for the mechanisms of phosphate on copper corrosion. It
can be assumed that phosphate ions sorb on copper surface affecting the corrosion processes
during stagnation. Includes 15 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 860 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 06/17/2005 |
