Disclosed herein are corrosion prevention devices comprising a sacrificial anode and a mass sensor. Also disclosed herein are corrosion prevention devices comprising a controller in communication with the mass sensor and sacrificial anode. The controller can be configured to receive mass data to detect when the mass of the sacrificial anode has fallen below a predetermined threshold. Upon determining that the mass has fallen below the predetermined threshold, the controller can designate that the sacrificial anode is depleted. In response, the controller can output instructions for performing one or more corrective actions to protect the desired structure from corrosion.

This application discloses magnetically coupled integrated probes and probe systems, attachable to the robotic arms of a remotely operated vehicle to perform both cathodic protection (CP) voltage measurements and ultrasonic testing (UT) thickness measurements at an underwater surface. The integrated probe system can include a spring for coupling to an ROV end effector. An ultrasonic probe is disposed within and extends from the sleeve housing. A magnetic carrier, flux concentrator, and gimbal surround a portion of the ultrasonic probe, and one or more electrically conductive legs extend from the front surface of the gimbal to function as a CP probe. The legs are arranged about the ultrasonic probe, which has a flexible membrane exposed at the front surface of the gimbal, such that during inspection, at least one leg contacts the surface and the ultrasonic probe is sufficiently proximate to provide substantially simultaneous CP and UT measurements.

A marine vessel propulsion device having a metal component in contact with water. The marine vessel propulsion device includes an anticorrosive anode made of a metal material that is less corrosion-resistant than the metal component, is electrically connected to the metal component, and is disposed in contact with the water contacting the metal component, a primary reference electrode isolated from the metal component and the anticorrosive anode, and disposed in contact with the water contacting the metal component, and a potentiometer that detects a potential difference of the metal component or the anticorrosive anode with respect to the primary reference electrode.

An automated system for measuring the voltage potential across test coupons, reference cells and metal structures is disclosed. The system may evaluate the amount of cathodic protection that may be applied to the metal structure. The system may automatically take, store and transmit data to a backend system via wireless and/or satellite communication systems.

An automated system for measuring the voltage potential across test coupons, reference cells and metal structures is disclosed. The system may evaluate the amount of cathodic protection that may be applied to the metal structure. The system may automatically take, store and transmit data to a backend system via wireless and/or satellite communication systems.

The metal tank portion of an electric water heater is protected against corrosion utilizing a corrosion protection system that detects a voltage potential between the sheath portion of a tank water-immersed electric heating element and the tank. In one embodiment of the corrosion protection system the sensed sheath/tank potential is utilized to enable a user of the water heater to accurately gauge the necessity of replacing a sacrificial anode extending into the tank. In another corrosion protection system, the sensed sheath/tank potential is utilized to provide impressed current cathodic protection of the tank and also to prevent dry firing of the electric water heater.

The metal tank portion of an electric water heater is protected against corrosion utilizing a corrosion protection system that detects a voltage potential between the sheath portion of a tank water-immersed electric heating element and the tank. In one embodiment of the corrosion protection system the sensed sheath/tank potential is utilized to enable a user of the water heater to accurately gauge the necessity of replacing a sacrificial anode extending into the tank. In another corrosion protection system, the sensed sheath/tank potential is utilized to provide impressed current cathodic protection of the tank and also to prevent dry firing of the electric water heater.

Embodiments of the present disclosure provide devices, systems and methods for monitoring anti-corrosion efforts including the efficacy of cathodic protection systems. Embodiments of the present disclosure provide devices, systems and methods for remote cell cathodic protection (CP) survey data acquisition to sense, display, and record CP survey voltage potential measurements as well as global positioning system and navigation data. Embodiments of the present disclosure provide improvements in terms reduced noise and improved signal quality through the use of copper conductors that connect electrochemical reference cells (i.e., electrodes) to measuring apparatus. Further, improved signal detection is provided by embodiments including reference electrodes that may be placed further (e.g., up to 1000 feet) from a surface vessel than are found in conventional system. Disclosed embodiments also provide highly precise spatial mapping of CP potentials (e.g., to within 0.5 mm spatial resolution in 1000 feet of depth).

Embodiments of the present disclosure provide devices, systems and methods for monitoring anti-corrosion efforts including the efficacy of cathodic protection systems. Embodiments of the present disclosure provide devices, systems and methods for remote cell cathodic protection (CP) survey data acquisition to sense, display, and record CP survey voltage potential measurements as well as global positioning system and navigation data. Embodiments of the present disclosure provide improvements in terms reduced noise and improved signal quality through the use of copper conductors that connect electrochemical reference cells (i.e., electrodes) to measuring apparatus. Further, improved signal detection is provided by embodiments including reference electrodes that may be placed further (e.g., up to 1000 feet) from a surface vessel than are found in conventional system. Disclosed embodiments also provide highly precise spatial mapping of CP potentials (e.g., to within 0.5 mm spatial resolution in 1000 feet of depth).

The present disclosure is for a safety system for de-coupling of a cathodically protected structure. The safety system comprises both a DC (Direct Current) component, connected or connectable between the structure and ground, and an AC (Alternating Current) component, connected or connectable between the structure and ground and connected in parallel with the DC component. The safety system also comprises a switch connected in series with the AC component, the switch configured selectively to disconnect the AC component between the structure and ground while permitting the DC component to remain connected between structure and ground.