An anti-biofouling method which suppresses biofouling in water includes a preparation step of using a copper alloy-made anti-biofouling object member immersed in the water as a cathode electrode, and immersing and arranging an anode electrode member serving as a counter electrode of the anti-biofouling object member in the water, and a current supplying step of supplying DC current between the anti-biofouling object member and the anode electrode member.

An anchor is buried in the ground near a place where a utility pole is installed. A guy wire is connected to the utility pole. A guy wire rod couples the anchor and the guy wire. An electrode is buried in the ground near a place where the anchor is buried. A power supply supplies an anti-corrosion current with an underground portion of the guy wire rod and the anchor as a cathode and the electrode as an anode. The power supply includes a photovoltaic cell.

An anchor is buried in the ground near a place where a utility pole is installed. A guy wire is connected to the utility pole. A guy wire rod couples the anchor and the guy wire. An electrode is buried in the ground near a place where the anchor is buried. A power supply supplies an anti-corrosion current with an underground portion of the guy wire rod and the anchor as a cathode and the electrode as an anode. The power supply includes a photovoltaic cell.

A device for cathodic protection (100) arranged to provide an impressed current cathodic protection of a metal element (10) configured to be immersed in an electrolytic environment. The device for cathodic protection (100) comprises a container body (110) comprising an inner chamber (111) and at least one conductive interface (115) arranged to be electrically connected to the metal element (10), an anode (120) integral to the container body (110) and having a portion which faces externally with respect to the container body (110), a reference electrode (130) integral to the container body (110) and having a portion which faces externally with respect to the container body (110), a direct current source (140) disposed in the container body (110) and comprising a negative pole, electrically connected to the conductive interface (115), and a positive pole, electrically connected to the anode (120), a control unit (150) disposed in the container body (110) and configured to measure an electric voltage ?V between the conductive interface (115) and the reference electrode (130) when the device for cathodic protection (100) is immersed in an electrolytic environment. In particular, the device for cathodic protection (100) is configured in such a way that, when the control unit (150) detects an electric voltage ?V>?V*, where ?V* is a predetermined threshold value, the direct current source (140) supplies an electric current I between the conductive interface (115) and the anode (120) such as to restore a condition ?V<?V*.

A device for cathodic protection (100) arranged to provide an impressed current cathodic protection of a metal element (10) configured to be immersed in an electrolytic environment. The device for cathodic protection (100) comprises a container body (110) comprising an inner chamber (111) and at least one conductive interface (115) arranged to be electrically connected to the metal element (10), an anode (120) integral to the container body (110) and having a portion which faces externally with respect to the container body (110), a reference electrode (130) integral to the container body (110) and having a portion which faces externally with respect to the container body (110), a direct current source (140) disposed in the container body (110) and comprising a negative pole, electrically connected to the conductive interface (115), and a positive pole, electrically connected to the anode (120), a control unit (150) disposed in the container body (110) and configured to measure an electric voltage ?V between the conductive interface (115) and the reference electrode (130) when the device for cathodic protection (100) is immersed in an electrolytic environment. In particular, the device for cathodic protection (100) is configured in such a way that, when the control unit (150) detects an electric voltage ?V>?V*, where ?V* is a predetermined threshold value, the direct current source (140) supplies an electric current I between the conductive interface (115) and the anode (120) such as to restore a condition ?V<?V*.

Provided is a system and method for preventing the chemical redox reaction, and thereby, corrosion between potable water and copper piping systems, which causes pinhole leaks in the copper piping systems. A sacrificial anode, made of a material, such as a metal or metal alloy less noble than copper, e.g., iron, zinc, aluminum, magnesium, titanium, and/or alloys thereof, is electrically attached to the potable water copper piping system. Alternatively an active cathodic corrosion prevention system may be used. The active cathodic corrosion protection system is composed of an independent source of DC power, a voltage controller and a non-sacrificial grounding anode. The negative terminal of the voltage controller is connected to the potable water copper piping system. The system is maintained at a voltage and/or potential above the reduction potential of copper.

Provided is a system and method for preventing the chemical redox reaction, and thereby, corrosion between potable water and copper piping systems, which causes pinhole leaks in the copper piping systems. A sacrificial anode, made of a material, such as a metal or metal alloy less noble than copper, e.g., iron, zinc, aluminum, magnesium, titanium, and/or alloys thereof, is electrically attached to the potable water copper piping system. Alternatively an active cathodic corrosion prevention system may be used. The active cathodic corrosion protection system is composed of an independent source of DC power, a voltage controller and a non-sacrificial grounding anode. The negative terminal of the voltage controller is connected to the potable water copper piping system. The system is maintained at a voltage and/or potential above the reduction potential of copper.

In a method for cathodically protecting and/or passivating a metal section in an ionically conductive material such as steel reinforcement in concrete or mortar, an impressed current or sacrificial anode communicates ionic current to the metal section and a storage component of electrical energy which can be a cell, battery or capacitor is provided as a component of the anode. The storage component can have replacement energy introduced by re-charging or replacing the component from an outside supply. Typically the cell or storage capacitor has an outer case which carries an anode material as an integral outer component. A mechanical clamp is provided to attach the assembly to a rebar. A current limiter is provided which prevents excess current draining the supply.

In a method for cathodically protecting and/or passivating a metal section in an ionically conductive material such as steel reinforcement in concrete or mortar, an impressed current or sacrificial anode communicates ionic current to the metal section and a storage component of electrical energy which can be a cell, battery or capacitor is provided as a component of the anode. The storage component can have replacement energy introduced by re-charging or replacing the component from an outside supply. Typically the cell or storage capacitor has an outer case which carries an anode material as an integral outer component. A mechanical clamp is provided to attach the assembly to a rebar. A current limiter is provided which prevents excess current draining the supply.

A corrosion resistant article including an aluminum substrate and a corrosion-inhibiting cerium based corrosion inhibitor corrosion inhibiting additive on the aluminum substrate, the corrosion inhibiting additive comprising an anodic corrosion inhibitor and a cathodic corrosion inhibitor, the anodic corrosion inhibitor greater than 25 wt % of the total inhibitor.