A method monitoring a corrosion of a device includes conveying an electrical current through a monitoring component. The monitoring component includes a replaceable consumable electrode embedded in an electrolyte and disposed onboard and in electrical communication with the device. The electrode is configured to degrade before the device corrodes. The monitoring component includes a sensor disposed in electrical communication with the replaceable consumable electrode and the device. The sensor is configured for detecting a degradation of the electrode. After conveying, the method includes sending a first signal from the sensor to a storage medium. After sending the first signal, the method includes sending a second signal from the storage medium to a communication device to thereby monitor the corrosion. A monitoring system and a method of monitoring a corrosion of a plurality of joints of the device are also described.

A cathode protection method of embedded CFRP anode for reinforced concrete structure includes the following steps. Provide a preformed groove with a predetermined shape and size in a surface of a protection area of a reinforced concrete body, and remove dust in the preformed groove. Provide a CFRP member on the surface of the protection area of the reinforced concrete body. Coat an electrical conductive adhesive material between side surfaces of the reinforcing column of the CFRP member and the preformed groove and between the reinforcing plate and the reinforced concrete body. Connect the CFRP member with a positive electrode of an external DC power supply and the steel reinforcing element with a negative electrode of the external DC power supply.

A cathodic protection unit (12) utilizes a signal generated by a conducting wire (14) inserted into a clamp body (16) after the clamp (16) is attached to a pipe (P). The wire (14) wraps a complete number of turns around the clamp structure. When the clamp is attached to the exterior of the pipe (P), the conducting wire (14) makes contact with the pipe (P) via a slight clamping pressure. Analyzing two signals generated by separate conducting wires (14) are used for cathodic protection.

Corrosion protection of steel in concrete is provided by locating an anode assembly including both a sacrificial anode and an impressed current anode in contact with the concrete and providing an impressed current from a power supply to the anode. The impressed current anode forms a perforated sleeve surrounding a rod of the sacrificial anode material with an activated ionically-conductive filler material between. The system can be used without the power supply in sacrificial mode or when the power supply is connected, the impressed current anode can be powered to provide an impressed current system and/or to recharge the sacrificial anode from sacrificial anode corrosion products.

Sacrificial anodes for installing in an ionically conductive medium at an installation site containing metal requiring cathodic protection are formed by locating anode cores in a tray having dividing members defining a row of side by side chambers with each chamber containing a respective one of the anode cores and casting into the receptacle a covering mortar for the anode cores with each anode core receiving a coating at least partly surrounding the anode core with the connecting wire exposed. The mortar is cast to form frangible bridges between each anode and the next. The trays are stacked and transported to the site where the installer separates and individually installs the anodes into the medium.

A hybrid sacrificial galvanic anode, an anodic system including the hybrid sacrificial anode, and a method of cathodically protecting steel reinforcement in concrete structures is provided. The hybrid anode provides initial steel polarization followed by long term galvanic protection without the use of batteries or external power supplies.

A corrosion protection anode using an external power supply in which a reinforcing layer formed of a fiber base material is laminated with an adhesive layer on one surface of a conductive layer formed of a graphite sheet, and an electrolyte layer of an electrolyte-containing resin formed in a sheet shape and having adhesive power such that the layer is capable of being adhered to the conductive layer and to a surface layer of an object to be protected from corrosion is adhered by the adhesive power thereof to the other surface of the conductive layer, wherein the conductive layer always has a resistance value of 4 or less between any two points on the surface thereof on a side that comes into contact with the electrolyte layer.

Sacrificial anodes for installing in an ionically conductive medium at an installation site containing metal requiring cathodic protection are formed by locating anode cores in a tray having dividing members defining a row of side by side chambers with each chamber containing a respective one of the anode cores and casting into the receptacle a covering mortar for the anode cores with each anode core receiving a coating at least partly surrounding the anode core with the connecting wire exposed. The mortar is cast to form frangible bridges between each anode and the next. The trays are stacked and transported to the site where the installer separates and individually installs the anodes into the medium.

A sacrificial galvanic anode, an anodic assembly including the sacrificial anode, and a method of cathodically protecting steel reinforcement in concrete structures from corrosion is provided. The sacrificial galvanic anode comprises at least one sacrificial metal helical coil. The galvanic anode is easily fabricated and occupies a minimum volume within a steel reinforced concrete structure while providing maximum surface area for sacrificial corrosion.

A hybrid sacrificial galvanic anode, an anodic system including the hybrid sacrificial anode, and a method of cathodically protecting steel reinforcement in concrete structures is provided. The hybrid anode provides initial steel polarization followed by long term galvanic protection without the use of batteries or external power supplies.