Page 108 - Pharmaceutical Analytical Chemistry III

 Corrosion and plumbo-solvency can be avoided and
controlled by:

 (i) Increasing pH by Ca(HCO3)2 which will precipitate
a protective calcium carbonate film on the inner
surface of the pipes.

 Ca(HCO3)2 CaCO3  + CO2  + H2O

(ii) Addition of oxygen – absorbing substances.
(iii) Use of galvanized (zinc – coated) pipes.