The use of acid addition to control alkaline scale formation in M.S.F. desalination plants results in a recirculating brine pH of 7.2 - 7.5. The use of an effective high temperature scale control additive results in a recirculating brine pH of 8.5 9.5. In laboratory tests the corrosion rate of ferrous metals was reduced by about 70 % and of non-ferrous metals by about 80 % as the brine pH was increased from 7.5 to 9.0. High recirculating brine pH should lead to better plant reliability and availability due to these lower corrosion rates.
The effect of scale control additives on the corrosion rates of plant constructional materials
FIFTH INTERN. SYMP. ON FRESH WATER FROM THE SEA. ; 1 ; 379-386
1976
8 Seiten, 1 Bild, 4 Tabellen, 8 Quellen
Aufsatz (Konferenz)
Englisch