Provided is a marine current energy generating device for a deep sea cage. The marine current energy generating device includes a vortex vibration generating portion, where the vortex vibration generating portion is used for generating vortex vibration on a side facing away from a marine current; power generating portions, where several nano friction generators are arranged in the power generating portions, and the several nano friction generators generate power by using the vortex vibration generated by the vortex vibration generating portion and are electrically connected to each other; a guide portion, where the guide portion is used for making the vortex vibration generating portion perpendicular to a direction of the marine current all the time; and corrosion protection assemblies, where the corrosion protection assemblies are arranged at joints of the vortex vibration generating portion to the power generating portions and the guide portion.

To provide a rolling bearing having excellent rust prevention capability and capable of being used for a long period of time in a highly corrosion environment. A rolling bearing 1 utilized for a power generator which generates power from natural energy or for generator equipment has one or more bearing members which form the bearing having a rust prevention film formed in a predetermined region of a surface of a base material. The rust prevention film is formed by a porous film with a sacrificial anode action against the base material in the whole of the predetermined region. The porous film in a part or the whole of the predetermined region is subjected to sealing treatment which impregnates the porous film with a sealing treatment agent from a surface of the porous film. A surface of a sealing treatment body obtained from the porous film subjected to the sealing treatment is subjected to first coating treatment which coats the surface of the sealing treatment body with epoxy resin coating. A coated surface formed by the first coating treatment is subjected to a second coating treatment which coats the coated surface with urethane resin coating. The sealing treatment agent is formed by diluting the epoxy resin coating at a dilution rate of between 15 and 25%.

A wind turbine with reduced electromagnetic scattering includes a wind turbine support structure having a cylindrical shape, a wind turbine blade supported by the wind support structure, and a plurality of multi-layer absorbers to limit the electromagnetic scattering, the absorber including at least cobalt ferrite alloy nano-particles, cobalt ferrite alloy nano-flakes, and air. The wind turbine blade includes a blade root, a blade tip opposite the blade root, and a blade middle part extending between the blade root and the blade tip. The plurality of multi-layer absorbers further includes a planar absorber that covers the wind turbine support structure, and a curved absorber that covers the middle part.

The present invention relates to coating compositions for wind turbine blades. The compositions are particularly useful as topcoats for wind blades and for Leading Edge Protection (LEP). The invention also relates to a wind blade coated with a coating composition of the invention and to a method for application of the coating composition and to a method for repairing and/or replacing the existing coating layer on a wind blade by application of a coating composition of the invention. The invention also relates to a kit of parts comprising the base composition and the curing agent used in the coating composition. The coating composition used for coating a wind blade comprises a base composition comprising a polyetheraspartic ester having the formula (I) below, wherein each R represents a linear or branched C.sub.1-C.sub.10 alkyl residue, such as a linear or branched C.sub.1-C.sub.6 alkyl residue, such as for example a methyl, ethyl, propyl or butyl residue; and wherein X is a polyether. The coating composition further comprises a curing agent.

Embodiments relate to a method for forming a protective coating on a substrate and a wind power generation system which comprises a blade and a protective coating on the blade.

A preparation method of a polytetrafluoroethylene (PTFE)-based membrane for preventing and removing ices covering wind turbine blades is provided and the method comprises: preparing a membrane into a PTFE rod material with polymerized monomers by using monomer polymerization methods such as blending, pre-compressing and pushing; making the membrane into a PTFE-based homogeneous membrane with micropores and nano and micron scale concave-convex geometrical ultra-structure morphologies under the condition that the membrane is cracked to generate a laminar exfoliated fabric-like structure in the hot calendaring process of the PTFE rod material by using a hot calendaring and fusion polymerization method; and applying the PTFE-based homogeneous membrane to blades of a large wind turbine in operation.

Described herein is a wind blade comprising an outer surface, and at least one coating layer applied to a part of the outer surface, the at least one coating layer including a first coating layer comprising: a) a primary composition comprising one or more aqueous dispersion of an aliphatic polyurethane; wherein said aqueous dispersion has a particle size characterized by a D50 (median) value below 1000 nm; and optionally b) a secondary composition comprising one or more polyisocyanates; wherein when the coating composition comprises b) then said aqueous dispersion in a) is present in an amount of at least 5 times the amount of said polyisocyanate in b) based on weight; when b) is absent then the coating composition is a one-component composition.

Disclosed herein is a blade for a turbine comprising a blade cover; a blade body; and a layer of adhesive disposed between the blade cover and the blade body; where the layer of adhesive comprises a first adhesive region and a second adhesive region; where the first adhesive region comprises an adhesive that is chemically different from an adhesive used in the second adhesive region.

A coating system configured to be applied to a thermal barrier coating of an article includes an infiltration coating configured to be applied to the thermal barrier coating. The infiltration coating infiltrates at least some pores of the thermal barrier coating. The infiltration coating decomposes within at least some pores of the thermal barrier coating to coat a portion of the at least some pores of the thermal barrier coating. The infiltration coating reduces a porosity of the thermal barrier coating. The coating system also includes a reactive phase spray formulation coat configured to be applied to the thermal barrier coating. The reactive phase spray formulation coating reacts with dust deposits on the thermal barrier coating.

The instant invention provides cross-linkable coating compositions, process for producing the same, and substrates coated therewith. The cross-linkable coating composition comprises: (a) polyaldehyde, or acetal or hemiacetal thereof; (b) an acid catalyst having pKa of less than 6; (c) a liquid media; (d) an acrylic polycarbamate comprising at least an average of 2.0 carbamate functional groups, wherein said polycarbamate has a glass transition (Tg) of less than 25 C.; and (e) one or more fillers having a pH in the range of equal to or less than 9 and/or one or more pigments having a pH in the range of equal to or less than 9, and/or one or more additives having a pH in the range of equal to or less than 9, wherein said composition has a curing temperature in the range of less than 70 C.