A dried latex emulsion coating on a surface of a metal member is used as a thin bond layer on well tubular joints, on tubular strings in wells, and on other metal members. The bond layer promotes adhesion to cement members formed from hardening a cement slurry in contact with the bond layer. The bond layer can be used in bonded cement structures, on well tubular joints, on tubular strings in a well, on tubular strings cemented in a well, in methods of making the cement structures and the tubular strings, and in methods of placing and cementing a tubular string in a well.

The disclosure pertains to methods and systems for converting inactive chemicals into active chemicals in-situ for treating oil and gas pipelines, other industrial systems, or sanitizing surfaces. A method of treating an oil and gas pipeline is disclosed. The method may include feeding an inactive additive through a first conduit and into a second conduit, wherein the second conduit is in fluid communication with the first conduit and the oil and gas pipeline. The method also includes converting the inactive additive into an active additive within the second conduit and introducing the active additive into the oil and gas pipeline.

A robotic system is provided for repeatedly and reproducibly applying a sealant to a seam in an assembled HVAC duct component. The applied sealant has a predetermined location on the assembled HVAC duct component to seal the seam. An assembled HVAC duct component is thus provided having a robot applied sealant on at least one seam in the assembled HVAC duct component, wherein the applied sealant has at least one of a predetermined location, thickness or coverage. The robotically applied sealant can be applied to a blank for forming the assembled HVAC duct component, wherein the sealant is located at locations forming a seam in the assembled HVAC duct component.

Disclosed is a coated metal pipe including a metal pipe and a multi-layered coating film that covers an outer circumferential surface of the metal pipe. The multi-layered coating film includes a chemical conversion layer and a primer layer, and these layers are provided in this order from the inside. The chemical conversion layer contains a zirconium oxide and/or a zirconium hydroxide. The primer layer contains a polyamide imide and/or an epoxy resin.

Minimum Federal Safety Standards for corrosion control on buried oil and natural 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 susceptible pipes. In certain examples described herein, electrically-conductive nanocomposites can be used and provide intrinsically-safe foam materials without the dielectric shielding issues of existing materials used to physically protect and stabilize buried pipelines. As cured or formed by customary spray applications, the nanocomposite foams described herein are directly compatible with ICCP functionality wherever foam contacts the metallic pipe. Various foam compositions and their use with underground pipelines are described.

A wet cylinder liner for internal combustion engines may include a cylindrical body composed of a ferrous alloy having a circumferential outer surface. The cylindrical body may include a first layer and a second layer disposed sequentially on the outer surface. The first layer may include at least one of at least one silicon and at least one two-component epoxy adhesive. The second layer may include a silane-elastomer compound. The silane-elastomer compound may include nanoparticles of silicon oxide and an adhesion modifier additive. The second layer may be configured as an interface between a cooling fluid and the first layer, as well as to resist erosion by cavitation. The first layer may facilitate an interface for resistance at high temperatures.

An applicator machine and a process for heating and coating a section of pipeline. The applicator machine includes a frame configured to rotate about a section of pipeline to be heated and coated, rotating means operable to rotate the frame, and coating material applicators induction coils and radiant heaters mounted on the frame and rotatable therewith. The induction coil is configured to heat a section of pipeline adjacent to the induction coil to a coating material application temperature. The radiant heaters are configured to heat factory-applied coatings. Each coating material applicator sprays coating material through an aperture in a respective induction coil. The applicator includes an enclosure configured to surround a section of pipeline and provision for evacuating and collecting waste coating material. The coating material applicator may be configured to spray powder coating material, such as fusion bonded epoxy powder material and/or chemically modified polypropylene powder material.

Various embodiments relate to a blasting ring for blasting a weld on a pipe, including: a ring structure with a first pivot point and a latch, wherein the first pivot point allows the ring structure to open and close around the pipe and the latch is configured to secure the ring to the pipe; a plurality of rollers attached to the ring structure configured to engage the pipe; a cleaner brush attached to the ring structure configured to rotate and engage the weld on the pipe to clean the weld; and a profile brush attached to the ring structure configured to rotate and engage the weld on the pipe to profile the weld. Further, the blasting ring and a heating ring may be used to finish the weld on a pipe.

A new system has a plurality of modular segments flexibly attached to one other and a source of electrical power and plating and coating solutions at the rear of the plurality of modular segments. The plurality of modular segments include a drive stage configured to push the plurality of modular segments along a surface, a plating stage configured to apply the plating solution to the surface under a pre-set operating current density to deposit metal or metal alloy onto the surface, a surface treatment application stage configured to apply the coating solution to the surface, and a curing stage configured to cure the coating solution to form a final coating on the surface that is resistant to corrosion, chemical attacks and chemical buildup.

A lining for a compressor case is provided. The lining comprises a layer of primer applied to an interior surface of the compressor case, and at least one layer of a seal compound applied to the layer of primer. The primer has been found to significantly improve the bond strength between the base metal and the coating. Also, the primer provides a waterproof coating at the bond interface, which prevents any moisture from creeping under the plastic and causing material break-out. The waterproof coating also provides an increased corrosion resistance to the base metal and stator vanes where the plastic lining has been applied. A method of lining a compressor case is also provided, comprising applying a first layer comprising a primer to an interior surface of the compressor case, and applying at least one second layer over the first layer of primer, the at least one second layer comprising a seal compound to line the compressor case.