A clamp for a pipe includes: a crevice corrosion-resistant member surrounding the outer surface of the pipe; and a body that is assembled to allow the crevice corrosion-resistant member to be disposed inside thereof and has opening walls formed at both ends thereof, each of the opening walls having an opening hole through which the pipe passes, wherein the crevice corrosion-resistant member is provided to have the same length as a distance between the opening walls, and thus ends of the crevice corrosion-resistant member can be supported by the opening walls, respectively.

A clamp for a pipe includes: a crevice corrosion-resistant member surrounding the outer surface of the pipe; and a body that is assembled to allow the crevice corrosion-resistant member to be disposed inside thereof and has opening walls formed at both ends thereof, each of the opening walls having an opening hole through which the pipe passes, wherein the crevice corrosion-resistant member is provided to have the same length as a distance between the opening walls, and thus ends of the crevice corrosion-resistant member can be supported by the opening walls, respectively.

The invention to which this application relates is to a propeller of the type for use in relation to water vessels and which can be moved between an in-use position in which the blades of the propeller extend outwardly to provide a propulsion force when rotated and, a storage position in which the desire is to minimize the effect of the blades as the vessel moves through the water and in which the blades are held substantially in line with the body of the propeller. The location means which allow the blades to be connected to the body are located within the body and thereby minimize the risk of corrosion and thereby increase the life of the propeller whilst also providing a secure fitment of the blades to the body and allowing ease of movement of the blades between in-use and storage positions.

The invention to which this application relates is to a propeller of the type for use in relation to water vessels and which can be moved between an in-use position in which the blades of the propeller extend outwardly to provide a propulsion force when rotated and, a storage position in which the desire is to minimize the effect of the blades as the vessel moves through the water and in which the blades are held substantially in line with the body of the propeller. The location means which allow the blades to be connected to the body are located within the body and thereby minimize the risk of corrosion and thereby increase the life of the propeller whilst also providing a secure fitment of the blades to the body and allowing ease of movement of the blades between in-use and storage positions.

A metal section in concrete or mortar material is protected against corrosion by providing an anode and a solar panel where the solar panel and the anode are supplied for installation as a common unit where the anode is mounted to the rear of the solar panel with an optional storage component therebetween. At least a part of the anode is attached to a surface of the material and one or both of the anode and the solar panel is flexible to conform to the surface. In installation, a light meter is used to determine levels of ambient light for example in an interior location not in receipt of direct sunlight and details of the material and metal section at the location to calculate a required location and size of the solar panels and the anodes.

A metal section in concrete or mortar material is protected against corrosion by providing an anode and a solar panel where the solar panel and the anode are supplied for installation as a common unit where the anode is mounted to the rear of the solar panel with an optional storage component therebetween. At least a part of the anode is attached to a surface of the material and one or both of the anode and the solar panel is flexible to conform to the surface. In installation, a light meter is used to determine levels of ambient light for example in an interior location not in receipt of direct sunlight and details of the material and metal section at the location to calculate a required location and size of the solar panels and the anodes.

A sacrificial metal component, such as a zinc bar, is mounted on the frame of a land vehicle to reduce the corrosion of the frame of the land vehicle. The zinc bar is mounted on the frame in a manner to electrically couple the zinc bar to the land vehicle to promote the sacrificial nature of the zinc bar. The zinc bar can be mounted on a metal bracket secured to the frame of the land vehicle by metal fasteners, molded with a steel mounting strap that can be secured to the frame of the land vehicle by metal fasteners, or simply be detachably connected to the zinc bar and to the frame of the land vehicle, or alternatively, attached directly to the frame of the land vehicle. With reduction in size, the zinc bar will need to be replaced for continued operation.

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. A current limiter is provided which prevents excess current draining the supply. This can be a semi-conductive device such as a transistor or diode is connected in the path from the anode to the metal section to limit the cathodic protection current to a value of the order of 1 milliamp. When a diode or similar device is used the current can be limited to the reverse leakage current of the diode.

The invention discloses an offshore Tension Anode system and an installation method thereof. The system comprises a tension platform, a tension device, a composite cable integrated with auxiliary anodes and reference electrodes, and a gravity type foundation base, wherein the tension device is installed on the tension platform; the upper end of the composite cable is tensioned by the tension device, and the lower end of the composite cable sinks to a seabed along with the gravity type foundation base and is anchored by the gravity type foundation base; and the composite cable integrated with the auxiliary anodes and the reference electrodes is a main part of the system. The system is simple in structure and convenient to install and transport. The invention further discloses the installation method of the system, which can safely and reliably install the offshore tension anode system on an offshore platform. The installation method mainly comprises: (1) lifting the composite cable and the gravity type foundation base to an offshore platform; (2) installing the gravity type foundation base on a seabed; (3) installing the composite cable; (4) tension adjustment and lock fixation of composite cable.

The invention discloses an offshore Tension Anode system and an installation method thereof. The system comprises a tension platform, a tension device, a composite cable integrated with auxiliary anodes and reference electrodes, and a gravity type foundation base, wherein the tension device is installed on the tension platform; the upper end of the composite cable is tensioned by the tension device, and the lower end of the composite cable sinks to a seabed along with the gravity type foundation base and is anchored by the gravity type foundation base; and the composite cable integrated with the auxiliary anodes and the reference electrodes is a main part of the system. The system is simple in structure and convenient to install and transport. The invention further discloses the installation method of the system, which can safely and reliably install the offshore tension anode system on an offshore platform. The installation method mainly comprises: (1) lifting the composite cable and the gravity type foundation base to an offshore platform; (2) installing the gravity type foundation base on a seabed; (3) installing the composite cable; (4) tension adjustment and lock fixation of composite cable.