Minimum Federal Safety Standards for corrosion control on buried oil & gas pipelines stipulate that metallic pipes should be properly coated and have impressed-current cathodic protection (ICCP) systems in place to control the electrical potential field around a protected pipe. In certain examples described herein, electrically-conductive composites can be used and provide intrinsically-safe materials without the dielectric shielding issues of existing materials used with pipelines. As reacted by customary spray applications, the nanocomposite foams described herein are directly compatible with ICCP functionality wherever foam contacts the metallic pipe. Various compositions and their use with underground and/or above ground pipelines are described.

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.

A method for eliminating hydrocarbon fouling and reducing pumping power during hydrocarbon transportation. A dielectric layer covers the inner surface of a pipeline for transporting a water-hydrocarbon mixture. A proximity electrode is immersed in the water-hydrocarbon mixture, and an electrical voltage is applied across the dielectric layer. A buffer layer of water is formed on the dielectric layer since water is electrically attracted from the water-hydrocarbon mixture. This water layer, located between the dielectric layer and the water-hydrocarbon mixture, eliminates hydrocarbon fouling on the inner surface of the pipeline or any other internal surface that needs fouling protection. Alternatively, the dielectric layer covers an outer surface of the pipeline and is covered by an external conducting layer. Applying a potential difference between the proximity electrode and the external conducting layer still forms a water buffer layer between the inner surface and the water-hydrocarbon mixture, which eliminates hydrocarbon fouling.

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).

A carbon steel main body defines a flow passage. The carbon steel main body includes an end. The carbon steel main body includes a beveled edge at the end. A corrosion resistant cladding is deposited along an inner surface of the carbon steel main body. The corrosion resistant cladding extends from the end to a distance into the carbon steel main body.

A tubular includes a carbon steel main body defining a first flow passage. The carbon steel main body includes a first end and a second end. The carbon steel main body includes a beveled edge at the first end of the carbon steel main body. A corrosion resistant pup defines a second flow passage in-line with the first flow passage. The corrosion resistant pup includes a substantially same inner diameter and outer diameter as the carbon steel main body. The corrosion resistant pup includes a first end and a second end. The corrosion resistant pup includes a first beveled edge at the first end. The corrosion resistant pup is connected to the carbon steel main body by a weld along the beveled edge of the carbon steel main body and the beveled edge of the corrosion resistant pup.

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.

A metal plate corrosion sensing apparatus includes a conduit, and an electrical resistance probe mounted within the conduit, the electrical resistance probe configured to receive an electrical signal indicating a thickness of the metal plate, wherein the conduit comprises a plurality of slots configured to simulate an air/soil interface by permitting fluid access to the electrical resistance probe within the conduit through the slots.

The iron-based piping element (1), in particular made from cast iron, for a buried pipeline, includes an outer coating (9) including: a first layer (11) having at least one porous layer of zinc/aluminum alloy containing 5 to 60 wt % of aluminum; a second layer (13) of adhesive situated on the first layer (11); and a third layer (15) situated on the second layer (13) and including a synthetic organic material. The method for manufacturing such a piping element is also described.

The invention relates to a system for applying a superimposed time-varying frequency electromagnetic wave to a target object or a target region that is formed by the target object and a medium surrounding the target object, comprising a device for generating a superimposed time-varying frequency electromagnetic wave where the time-varying AC wave is riding on the predefined DC bias voltage. When applied to the object or region, the superimposed time-varying frequency electromagnetic wave is able to induce a flow of ionic current having a DC component traveling in a pulsating and time-varying manner in the target object and/or in the medium and effect induced vibration of electrons and molecules of the target object and the medium. The invention also relates to a method applying a superimposed time-varying frequency electromagnetic wave to a target object or a target region. The method and the system of the invention significantly reduce the capital cost and require very low energy, with the environmentally friendly final products, and are able to result in various treatment effects simultaneously.