A cathodic protection system comprising a short message system (SMS) transceiver. The SMS transceiver comprises a modem having a telephone number uniquely associated with it and a processor coupled to the modem. The processor is configured to retrieve sensor data from an input module of the cathodic protection system in response to an incoming SMS message from a remote telecommunication device when the incoming SMS message complies with a predetermined format. The processor is also configured to retrieve output voltage and current data from a rectifier monitor of the cathodic protection system in response to an incoming SMS message from the remote telecommunication device when the incoming SMS message complies with the predetermined format. The processor then sends the retrieved data to the remote telecommunication device via an outgoing SMS message.

A cathodic protection system comprising a short message system (SMS) transceiver. The SMS transceiver comprises a modem having a telephone number uniquely associated with it and a processor coupled to the modem. The processor is configured to retrieve sensor data from an input module of the cathodic protection system in response to an incoming SMS message from a remote telecommunication device when the incoming SMS message complies with a predetermined format. The processor is also configured to retrieve output voltage and current data from a rectifier monitor of the cathodic protection system in response to an incoming SMS message from the remote telecommunication device when the incoming SMS message complies with the predetermined format. The processor then sends the retrieved data to the remote telecommunication device via an outgoing SMS message.

A cathodic protection system for use with a wood veneer dryer is provided. The system includes a DC power supply and an anode mounted inside the dryer in a position to be electrolytically coupled to metallic structures or surfaces inside the dryer when an electrolytic medium is present inside the dryer. The electrolytic medium comprises a high-humidity atmosphere. A method for reducing the corrosion of metallic structures or surfaces inside the dryer is further provided. The method comprises mounting an anode inside the dryer in a position to be electrolytically coupled to the metallic structures or surfaces inside the dryer when an electrolytic medium is present. Wood veneer is conveyed through the dryer and heated to a temperature sufficient to produce a high-humidity atmosphere inside the dryer. A controlled amount of current is supplied by the DC power supply to electrolytically couple the anode to the metallic structures or surfaces.

A cathodic protection system for use with a wood veneer dryer is provided. The system includes a DC power supply and an anode mounted inside the dryer in a position to be electrolytically coupled to metallic structures or surfaces inside the dryer when an electrolytic medium is present inside the dryer. The electrolytic medium comprises a high-humidity atmosphere. A method for reducing the corrosion of metallic structures or surfaces inside the dryer is further provided. The method comprises mounting an anode inside the dryer in a position to be electrolytically coupled to the metallic structures or surfaces inside the dryer when an electrolytic medium is present. Wood veneer is conveyed through the dryer and heated to a temperature sufficient to produce a high-humidity atmosphere inside the dryer. A controlled amount of current is supplied by the DC power supply to electrolytically couple the anode to the metallic structures or surfaces.

A method and system for testing a cathodic protection system that protects a metallic structure with one or more DC power sources electrically connected to the metallic structure and an associated reference electrode. A Cathodic Protection Waveform Monitoring Unit (CPWMU) operates independently from power cycling by the cathodic protection system to measure cathodic protection voltage levels by measuring, over one or more measurement time periods, a voltage differential between the metallic structure and its associated reference electrode, a plurality of times when power provided to the metallic structure is cycled on and off. The CPWMU includes digital storage to store values indicative of the measured voltage differentials over the measurement time period. A reader that may be remotely located from any CPWMU communicates with a number of CPWMU's within communication range to obtain the values stored in the CPWMUs.

A method and system for testing a cathodic protection system that protects a metallic structure with one or more DC power sources electrically connected to the metallic structure and an associated reference electrode. A Cathodic Protection Waveform Monitoring Unit (CPWMU) operates independently from power cycling by the cathodic protection system to measure cathodic protection voltage levels by measuring, over one or more measurement time periods, a voltage differential between the metallic structure and its associated reference electrode, a plurality of times when power provided to the metallic structure is cycled on and off. The CPWMU includes digital storage to store values indicative of the measured voltage differentials over the measurement time period. A reader that may be remotely located from any CPWMU communicates with a number of CPWMU's within communication range to obtain the values stored in the CPWMUs.

Methods and electric circuit arrangements for protecting metallic components in an electrolytic medium from corrosion due to direct-current (DC) stray current (Is) from a power supply system. The DC stray current may be jointly registered as a total sum current across all active conductors together with the protective conductor of the power supply system by a DC total differential-current sensor. Alternatively, a combined DC differential-current sensor is switchable by a switching device, a differential current being registered across all active conductors or the DC stray current being registered as a total differential current across all active conductors and the protective conductor. Alternatively, a differential current may be registered across all active conductors by a DC current sensor at the protective conductor and the DC stray current computed by forming differences of the differential current registered by the differential-current transformer and of the protective conductor registered by the DC current sensor.

A portable unit is arranged to measure a value for polarized potential in a corrosion protection system comprising a protected structure, an anode and a reference electrode, which portable unit is connectable to the protected structure and to the reference electrode. The portable unit is arranged toperform voltage measurements to detect and monitor an instant-off sequence, wherein the corrosion protection system is turned off for a predetermined time period during normal operation. If an instant-off sequence is detected, then a voltage measurement is performed to measure a voltage signal representing a direct current potential curve for the corrosion protection system during the instant-off sequence. A step response detected in the voltage signal during an initial IR drop and a subsequent voltage decay are analysed. An initial value for the voltage signal at the time of the step response is determined and displayed as a value for polarized potential.

A portable unit is arranged to measure a value for polarized potential in a corrosion protection system comprising a protected structure, an anode and a reference electrode, which portable unit is connectable to the protected structure and to the reference electrode. The portable unit is arranged toperform voltage measurements to detect and monitor an instant-off sequence, wherein the corrosion protection system is turned off for a predetermined time period during normal operation. If an instant-off sequence is detected, then a voltage measurement is performed to measure a voltage signal representing a direct current potential curve for the corrosion protection system during the instant-off sequence. A step response detected in the voltage signal during an initial IR drop and a subsequent voltage decay are analysed. An initial value for the voltage signal at the time of the step response is determined and displayed as a value for polarized potential.

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.