Abstract: An automated, remote control/monitoring system for a cathodic protection system for a buried metallic object based on monitoring multiple coupon test stations, buried next to the metal object, by a central processor, which can individually control multiple cathodic protection rectifiers. Preferably, the reference for potential measurements is a buried coupon having a metallurgy substantially the same as the metallurgy of the buried object.

Abstract: A test station for measuring the effectiveness of cathodic protection including a cylindrical plastic reference tube extending downwardly through the soil to near the protected structure, such as a pipe. Two plastic coupon tubes extend within the chamber of the reference tube attaching to opposite sides of its interior sidewalls. First and second circular cylindrical rod-shaped coupons attach to, and sealingly engage, the bottom ends of the coupon tubes. Insulated conductors extend from attachment to each coupon upwardly through the coupon tubes. A first coupon is electrically connected to the pipe, and the second coupon is used to measure a free-corrosion (native) potential.

Abstract: A corrosion monitoring apparatus and method for determining the corrosive effects of a chemical environment, having an environmental pressure, on a vessel containing the chemical environment. A probe is exposed to the environment and is made of a material substantially similar to that of which the vessel is made. The probe has a sealed internal chamber which contains a pressurized fluid which is monitored. A pressure transducer is in communication with the sealed internal chamber of the first probe for translating any pressure change within the chamber into a (preferably electrical) signal which is indicated by an electrical meter or similar device. Stress corrosion cracking of the probe causes fluid leakage and, therefore, a pressure change.