8 results about "Composite coating" patented technology

The invention discloses functional composite coating and a preparing method thereof and belongs to the technical field of coatings. The functional composite coating solves the problems that a corrosion-resisting coating in the prior art is large in thickness, low in elasticity, easy to damage in larger stress impact, poor in friction resistance, poor in marine corrosion resistance, short in service life and unable to be used in a wider temperature range. The composite coating is composed of a base coat, a floating coat and a cover coat, wherein the base coat is composed of a zinc chromate primer and a zinc chromate primer curing agent according to a weight ratio of 8 to 1, the thickness of the base coat is 35-65mum, the floating coat is composed of epoxy resin, an epoxy curing agent, a flexibilizer and a filling agent, the thickness of the floating coat is 0.25-0.45mum, the cover coat is composed of fluorocarbon painting and functional painting according to a weight ratio of 1 to 1, and the thickness of the cover coat is 0.4-0.8mum. The composite coating has excellent corrosion resistance, friction resistance and impact resistance, is small in coating thickness and high in elasticity, can resist high-low temperature change of seawater and can be used in a wider temperature range.

The invention discloses a hydrophobic polymer film composite coating hydrophiling modification method which comprises the following steps: preparing a tannin solution with a certain concentration, adding a certain amount of silane coupling agent alcohol solution, stirring uniformly, and regulating the pH value of the mixed solution to alkalinity; sequentially soaking the polymer film in isopropanol, deionized water and the tannin-silane coupling agent solution; and after finishing the modification, taking out the film, flushing with deionized water many times, and storing in deionized water or in a dry environment at room temperature, thereby obtaining the hydrophiling-modified high-polymer film sample. The method greatly enhances the hydrophilicity and stability of the hydrophobic polymer film, has the advantages of simple modification technique and low cost, and has wide application range.

The invention relates to the technical field of surface treatment and modification of metal materials, and in particular relates to a preparation method for manufacturing a durable superhydrophobic coating on the surface of the aluminum and aluminum alloy. The method comprises the following steps that: after the surface of the aluminum and the aluminum alloy is roughened, washed, corroded and cleaned, a compound coating of durable maleic anhydride grafted polypropylene and polypropylene is coated on the surface of the aluminum and the aluminum alloy; therefore, the surface of the aluminum and the aluminum alloy has good durable super-hydrophobicity; the contact angle between the water and the surface is more than 150 degrees; and the super-hydrophobicity is still good after half a year. The preparation method is simple, is easy to operate and low in cost, the adopted reagent is harmless to the human body and does not pollute the environment.

The invention discloses a graphene modified self-lubricating wear-resistant coating. Mixed powder adopted comprises, by mass, 99.4-99.9% of WC-Co and 0.1-0.6% of graphene, after the powder making process of wet ball grinding on the mixed powder is completed, the powder is evenly scattered through ultrasonic treatment, drying is carried out, spraying powder with the grain size being 18-58 [mu]m is obtained through screening, and the graphene modified WC-Co self-lubricating wear-resistant coating is prepared by the adoption of an explosive spraying technology. The graphene modified WC-Co coating has the beneficial effects that the friction coefficient of the coating is decreased on the basis that the original high bonding strength and hardness of the WC-Co coating can be ensured, the abrasion loss is also reduced to a certain extent, the service life of parts can be prolonged, and the graphene modified self-lubricating wear-resistant coating is an excellent self-lubricating wear-resistant composite coating.

The invention relates to the technical field of material surface treatment, in particular to a coating roller, and application and a preparation method thereof. The coating roller comprises a coating roller base body and a composite coating, and the composite coating comprises an anti-corrosion coating and a low reflection coating which are arranged on the surface of the coating roller base body in sequence. The coating roller is high in hardness, good in abrasion resistance, not prone to being abraded and capable of reducing the loss of the roller body; the product quality is improved, the product consistency can be kept for a long time, and the yield is increased; the service life of the coating roller is three time or above that of a common roller, and expenses of spare parts are decreased; and the number of times for replacing the roller by halting is decreased, and the equipment using efficiency and the product production efficiency are improved.

The invention relates to a method for removing at least part of at least one layer of a composite coating that is formed of fibers and at least one resin that is present on the surface of the body of a gas cartridge. In said method, at least one liquid nitrogen stream is dispensed at a temperature less than −100 DEG C at a pressure of at least 00 bars upon contact with said coating so as to remove at least part of said coating layer present on the body of the gas cartridge.