Silver-silver sulfide reference electrode
AssigneeArizona Board of Regents on Behalf of the University of Arizona
InventorsDominic Francis Gervasio, Kalin Danton, Gil-Pyo Kim, Vlad Alex Sasaran, Nicholas Michael McEvoy, Alexis Gary
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Abstract
This present disclosure is directed to a silver metal wire coated with silver sulfide reference electrode, the preparation via anodization of a silver metal wire in a sodium and/or potassium sulfide solution and use thereof, including test methods to measure corrosion in test articles such as metal pipes. The reference electrode exhibits good stability characteristics, including stability under high temperature conditions.
Claims19
A reference electrode apparatus, the apparatus comprising:
- a silver wire;
- and
- a silver sulfide coating formed on the wire to produce a silver sulfide coated silver wire
- wherein said silver sulfide wire is prepared by anodizing silver wire in an aqueous sodium sulfide solution.
A method of making a reference electrode apparatus, said method comprising
- putting a silver wire Ag(0) in a solution of sodium sulfide (Na2S) or sodium sulfide (K2S);
- forming Ag2S on said Ag wire by anodizing Ag wire to generate Ag(+1) which in the presence of sodium sulfide or potassium sulfide reacts to form and deposit Ag2S on the silver wire to form a silver/silver-sulfide reference electrode (SSRE).
The sensor apparatus of claim 14, wherein the sensor output values are generated on board the reference electrode apparatus, processed and transformed to one or more kinetic parameters of said material via a data logger/potentiostat/other sensor reading/computing device that is hard-wired or wirelessly connected to the sensor, whereupon the sensor data presented to the user using a local sensor mounted or remote wireless visual display.
Dependencies are inferred from the claim text.