US 8,298,390 B2 · Electrochemical probes for corrosion monitoring in hydrogen sulfide systems and methods of avoiding the effect of electron-conducting deposits

Abstract

Electrochemical probes for corrosion monitoring in an environment that may cause the formation of electron-conducting deposits and the method for making such probes were described. The probes have long exposed electrodes. Except for the tip section, all surfaces of the exposed electrodes are coated with a coating or covered with electrically insulating tubing, so that only the tip section has uncovered metal that serves as the active areas of the electrodes. The coating or tubing material is such that the deposits cannot easily form on its surfaces. Because the electrical bridging between the active areas of any two electrodes requires the deposition of an evenly distributed layer of the electron-conducting deposits along the path from one area to the other area, the coated surface reduces the possibility of short-circuiting for the active areas of the electrodes. These probes are especially suitable for applications in systems containing hydrogen sulphide (H2S).

Claims17

Dependent claims

An electrochemical probe for corrosion monitoring in an environment that may cause the formation of electron-conducting deposits on the probe, comprising:

(a) a plurality of electrodes;
(b) a body wherein a portion of each electrode is embedded to form a probe and the remaining portion of the electrodes is exposed out of the probe body;
(c) electrical leads connected individually to each electrode at the end of the electrodes that are being embedded;
and
(d) a coating that is chemically and mechanically stable in said environment;
wherein the coating is applied to the electrodes, such that all surface areas of each exposed electrode—except for a polished area at the electrode tip that serves as the active area of the electrode—is covered by the coating and the electrodes are spaced such that there are gaps between the outside surfaces of the coatings of the adjacent electrodes near the active areas to prevent the formation of evenly distributed electron-conducting deposits on the electrodes to cause short-circuiting between any two active areas.

3 more elements

Dependencies are inferred from the claim text.

Electrochemical probes for corrosion monitoring in hydrogen sulfide systems and methods of avoiding the effect of electron-conducting deposits

Life of this patent

Electrochemical probes for corrosion monitoring in hydrogen sulfide systems and methods of avoiding the effect of electron-conducting deposits

Life of this patent

Abstract

Claims17