106results about How to "Improves corrosion protection" patented technology

The invention relates to a method for plasma-assisted chemical vapour deposition for coating, or removing material from, the inner wall of a hollow body (42). A gas lance (44) is introduced into the hollow body (42), and a cavity plasma (45) is formed by applying an electrical high-frequency field to a high-frequency electrode (41), forming a plasma cloud arranged on the tip of the gas lance.

The invention belongs to the technical field of magnesium alloy surface modification, and particularly relates to a magnesium alloy surface composite coating and a preparation method thereof. The magnesium alloy surface composite coating is characterized by comprising an aluminum metal layer and a micro-arc oxidation ceramic coating, wherein the aluminum metal layer is sprayed on the surface of amagnesium alloy matrix through cold spraying technology, and the micro-arc oxidation ceramic coating grows in situ on the aluminum metal layer through micro-arc oxidation technology. According to themagnesium alloy surface composite coating and preparation method thereof, the design of preparing a high-performance AL-MAO composite coating through aluminum cold spraying- micro-arc oxidation composite technology is adopted, the AL-MAO composite coating has a better hardness value than a single pure aluminum coating and a MAO coating, the mechanical property and the bearing capacity of the matrix are obviously improved, and the bearing capacity and the friction and wear resistance ability of the magnesium alloy can be effectively improved; the AL-MAO composite coating has relatively high hardness bearing capacity and better friction and wear resistance ability, is more obvious in improving the friction and wear characteristic of the matrix, and shows better reliability and longer servicelife; and a pure aluminum metal layer is introduced between the matrix and the MAO coating, so that the comprehensive performance of the composite coating is improved.

The invention discloses a marine anti-fouling and corrosion-resistant coating. The marine anti-fouling and corrosion-resistant coating is prepared from the following raw materials: bisbutyl tin oxide, carbon black, n-butanol, tributyl tin fluoride, tributyl benzyl ammonium chloride, vanillin, titanium dioxide, butyl acetate, polyvinyl acetate resin, glycol ethyl ether acetate, butyl rubber, p-tert-butylphenol formaldehyde resin, perchloroethylene, vaseline, toluene, stearic acid, magnesium oxide, antimony oxide, a silane coupling agent, iron oxide, a thixotropic agent, an auxiliary filler and a corrosion-resistant filler. The coating has the characteristics of good corrosion resistance and anti-fouling performance, can tolerate acid and alkali environments and has a good protection effect on the surface of a hull.

A composition comprising titanium, a small amount of at least one platinum group metal and alloying elements for lowering melting point of the composition to below titanium beta transus temperature.

A light metal workpiece with enhanced surface protection. The workpiece comprises a metal or alloy matrix having an exposed surface. A corrosion resistant oxide layer is formed in at least a portion of the exposed surface using a micro-arc oxidation technique. A first coating is applied onto at least a portion of the oxide layer using an electro-coating technique and is configured to seal the oxide layer. A second coating is applied onto at least a portion of the first coating, the second coating comprising a powder coating material. An appearance coating may optionally be applied onto at least a portion of the second coating, wherein the appearance coating includes at least one of a base coat, a color coat, and a clear coat.

The invention discloses a graphene oxide quantum dot as well as a preparation method and application thereof as a corrosion inhibitor, and belongs to the technical field of the corrosion inhibitor. The preparation method comprises the following steps: taking a graphite bar as a positive electrode and a noble electrode as a negative electrode; using an ammonium salt aqueous solution of hydroxyl-containing organic carboxylic acid as electrolyte, and electrolyzing at constant voltage; filtering the electrolyte after completing the electrolyzing by using a microfiltration membrane, carrying out dialysis purification on filtrate through deionized water, and drying, thus obtaining the graphene oxide quantum dot. The graphene oxide quantum dot disclosed by the invention has good dispersity in anaqueous solution; the preparation method disclosed by the invention is simple, green and environment-friendly, and the graphene oxide quantum dot has a good corrosion prevention effect on a carbon steel material in an acidic solution.