Patent ID: 7208117

Claim:
An automated process for inhibiting the internal corrosion of a boiler containing water comprising: (a) adding an initial amount of oxygen scavenger to the boiler water to provide a concentration of oxygen scavenger of at least 50 ppm; (b) adding an initial amount of alkaline chemical to the boiler water to provide a pH of about 8.5 to about 11.0; (c) automatically monitoring the pH and the oxidation-reduction potential of the boiler water; and (d) adjusting the pH of the boiler water by adding more alkaline chemical to the boiler water to maintain a pH between about 8.5 to about 11.0, and adjusting the ORP by adding more oxygen scavenger to the boiler water to maintain an ORP more negative than −120 mV, wherein said boiler is an inactive boiler.