Method of monitoring corrosion potential of engineering alloys in aqueous systems

摘要

An apparatus and method for measuring and monitoring the corrosion potential of engineering alloys used in aqueous systems is disclosed and claimed. The method is applicable for a variety of alloys including, but not limited to, copper-based, iron-based, nickel-based, other metallic-based alloys, and their combinations. The corrosion potential is typically determined by measuring a voltage between a specific material in the described oxidation-reduction potential measuring device and a reference electrode. Corrosion potentials for specific materials of construction may be used for diagnostic or control purposes.

主权项

1. A method of determining a corrosion potential for an engineering alloy in a hot water system via an oxidation-reduction potential measuring device (“ORP device”), wherein the ORP device comprises a flow-through cell having a plurality of ports and being connected either directly or indirectly to at least one electrical lead, an ORP probe associated with the flow-through cell, a temperature detector associated with the flow-through cell, and a reference electrode associated with the flow-through cell and being connected either directly or indirectly to at least one electrical lead, the method comprising:
(a) contacting hot water from the hot water system with an interior surface of the flow-through cell; (b) measuring voltage between the flow-through cell and the reference electrode via the respective electrical leads; and (c) determining the corrosion potential of the engineering alloy based upon the measured voltage, wherein the flow-through cell comprises a material of construction including the engineering alloy and the corrosion potential is the corrosion potential of the flow-through cell.