42results about How to "Long salt spray resistance" patented technology

A zinc-rich epoxy anti-corrosion coating, including a component A, capable of being cured into a film, and a component B containing a curing agent; component A contains, by weight percentage, graphene (0.1-5wt%), zinc powder (0-35wt%), filler (30-70wt%), 10-20wt% epoxy resin having 54wt% solids content, and solvent (10-20wt%), wherein the sum of the weight percentages of the graphene, zinc powder and filler is 60-80wt% and the sum of the weight percentages of all components of compenent A is 100wt%. The present invention adds graphene into an anti-corrosion coating, thus decreasing the thickness of the coating film, increases the anti-corrosion effect while decreasing zinc powder contents, reduces the amount of zinc oxide vapor generated during welding, and is environmentally friendly.

A zinc-rich epoxy anti-corrosion coating, including a component A, capable of being cured into a film, and a component B containing a curing agent; component A contains, by weight percentage, graphene (0.1-5wt%), zinc powder (0-35wt%), filler (30-70wt%), 10-20wt% epoxy resin having 54wt% solids content, and solvent (10-20wt%), wherein the sum of the weight percentages of the graphene, zinc powder and filler is 60-80wt% and the sum of the weight percentages of all components of compenent A is 100wt%. The present invention adds graphene into an anti-corrosion coating, thus decreasing the thickness of the coating film, increases the anti-corrosion effect while decreasing zinc powder contents, reduces the amount of zinc oxide vapor generated during welding, and is environmentally friendly.

The invention relates to a phosphorus-and-slag-free normal temperature coating agent. The phosphorus-and-slag-free normal temperature coating agent is suitable for the metal surface treatment of a plurality of metal materials, such as cold-rolled plates, hot-rolled plates, cast iron, galvanized plates, electrolytic plates, aluminum and aluminum alloys. The phosphorus-and-slag-free normal temperature coating agent is mainly composed of hexafluorozirconic acid, hydrofluoric acid, magnesium nitrate, hydrogen peroxide and water. The coating agent comprises a component A, a component B and a component C, wherein the component A comprises hexafluorozirconic acid, hydrofluoric acid and water; the component B comprises magnesium nitrate, hydrogen peroxide and water; and the component C comprises hexafluorozirconic acid, magnesium nitrate and water. A preparation method of the coating agent comprises the following steps: mixing the component A with the component B according to a certain ratio, fully stirring, and adding water to a constant volume; and adding the component C according to a certain proportion as a supplement to realize adjustment when the concentration of the above treatment liquid decreases. The phosphorus-and-slag-free normal temperature coating agent has the characteristics of strong adhesion capability, strong anticorrosion performance, simple operation method, and no need of the surface adjustment treatment or passivation enclosing, so the process flow is shortened, the coating agent can be repeatedly used for a long term, and the coating agent has a lower cost than traditional phosphatization liquids. Additionally, the environmentally-friendly coating agent contains no nitrites, phosphates, chromium ions or other toxic heavy metal ions or harmful volatile substances, so sewage can be directly discharged without sewage treatment.

The invention provides a preparation method of a Ca<2+> / SiO2 ion exchange type pigment. The preparation method comprises the steps of dissolving a calcium source into an alcohol solvent I, dissolvinga silicon source into an alcohol solvent II, preparing gel by virtue of a sol-gel method, drying, grinding and sieving the gel, selecting dry gel particles with the particle sizes of 0.1-30 microns asa precursor, and maintaining the precursor at 200-1000 DEG C for 0.5-8 hours until the precursor is crystallized, so as to obtain the pigment. The preparation method is simple in process and operation and low in production cost, the prepared Ca<2+> / SiO2 ion exchange type pigment has good solubleness and is applied to the fields of coatings, papermaking, oil ink, plastic, rubber and the like, andthe performance of corresponding materials can be improved; and furthermore, the pigment is low in content of impurity heavy metal, so that the potential safety hazards of a user can be reduced, the environmental friendliness can be improved, and the pigment has good application prospects.

The invention provides a conductive anticorrosion coating, which comprises 15-25 parts by weight of epoxy resin, 3-10 parts by weight of high-conductivity graphene slurry, 15-35 parts by weight of solvent and auxiliary agent in terms of mass fraction. The invention also provides a preparation method of the conductive anticorrosion paint. The present invention uses high-conductivity graphene material, combined with other components, supplemented with specific ratio and formula, completely replaces metal or metal ion fillers, so that high-conductivity graphene can be uniformly dispersed in the coating, greatly improving the Conductive properties and coating properties can also realize the layer-by-layer superposition of graphene, exert its shielding effect, and better protect. The present invention adopts physical composite methods such as ultrasound with simple process, so that the graphene is evenly distributed in the coating, without adding other additives, and reduces the introduction of impurities, thereby preparing a highly conductive and highly anti-corrosion graphene conductive anti-corrosion coating. Simple operation, safe and environment-friendly.

The invention belongs to the technical field of metal surface treatment and specifically relates to a compound passivating fluid for a mechanical zinc coating. The compound passivating fluid comprises a component A and a component B, wherein the component A is waterborne polyurethane, of which the weight percent is 8-18% in the compound passivating fluid; the component B is an inorganic passivator, of which the weight percent is 2.4-1.5% in the compound passivating fluid; and the balance is deionized water. The pH value of the compound passivating fluid is adjusted to 6-9 by using the sulfuric acid with the mass fraction of 98%. The compound passivating fluid has a better passivating function to a mechanical zinc coating workpiece; the environmental pollution caused by hexavalent chromium is avoided; a formed film is bright and transparent, is durable and excellent in flexibility, has a certain mechanical property, is excellent in water and chemical solvent resistance and is long in salt mist resisting time. The coating has the advantages of self-repairing function, high stability, low cost, simple preparation process and simple use method.

The invention discloses a coating composite material and its application. The coating composite material has low surface resistance, good electrical conductivity, long salt spray resistance time, and can effectively avoid metal corrosion. Moreover, the coating material of the present invention can be coated on various metal materials, and the obtained metal materials with the coating are suitable for fields such as petrochemical industry, automobile, ship, engineering machinery, electric power industry and the like.

The invention relates to a vacuum coating production process of an automobile hub with high physical and chemical properties. The production process comprises the following steps: (1) processing a hub blank; (2) inspecting and polishing the hub blank; (3) removing oil; (4) cleaning and drying; (5) carrying out pre-treatment; (6) spraying body powder and curing; (7) polishing; (8) spraying medium powder and curing; (9) vacuum coating: spraying a metal coating on the treated hub in a vacuum chamber according to a vacuum sputter coating principle; (10) preparing a transparent coating; and (11) finally inspecting and packaging, wherein the passivation coating is a chromate-free passivation coating and the metal coating is an aluminum film. According to the production process provided by the invention, the surface evenness and the corrosion resistance of the hub are improved, the evenness, the gloss, the hardness and the corrosion resistance of the surface of the hub are increased, the surface of the hub is sealed and metallized, and the hub has glossiness of water electroplating. The transparent coating has an adhesive force of a high vacuum coating. The production process provided by the invention is concise and low in energy consumption, and the prepared hub is high in hardness and strong in corrosion resistance.

The invention provides a nickel passivation solution and a preparation method thereof. The nickel passivation solution contains the following components: 1-10g / L of chromic anhydride, 30-100g / L of phosphoric acid, 20-50g / L of dimethylformamide and 1-10g / L of methyl triethoxysilane. The invention also provides a method for passivating a nickel surface by adopting the nickel passivation solution. By adopting the nickel passivation solution provided by the invention, a stable and permanent passivation layer can be formed on the metallic nickel surface and the salt mist resistance time is greatly lengthened. Meanwhile, the nickel passivation solution provided by the invention has lower content of hexavalent chromium and is safe and environment-friendly.