32results about How to "Excellent resistance to salt spray corrosion" patented technology

The invention discloses an aluminum alloy for a main frame structure of a transmission tower and a preparation method thereof and relates to the field of aluminum alloy casting, in particular to an aluminum alloy for a main frame structure of a transmission tower and a preparation method thereof. The aluminum alloy aims to solve the problem that an existing aluminum alloy is not suitable for the severe natural environment of the transmission tower and is poor in corrosion resistance. The aluminum alloy is prepared from the following elements in percent by mass: 5.5-6.5% of Zn, 1.2-1.9% of Mg, 0.1-0.3% of Mn, 0.05-0.25% of Cu, 0.05-0.25% of Zr, 0.02-0.1% of Ti, less than or equal to 0.25% of Fe, less than or equal to 0.15% of Si and the balance of Al and other inevitable impurity elements. The preparation method comprises the following steps: I, material preparation; II, smelting; III, refining and heating; IV, modification; and V, casting and twin-stage heat treatment. The preparation method disclosed by the invention is used for casting the high strength aluminum alloy for the main frame structure of the transmission tower.

The invention relates to a durable polyurethane finish capable of resisting marine-atmosphere environment, and a preparation method thereof. An A solution is prepared by an HDI trimer, a corrosion inhibitor and polyurethane-grade butyl acetate; a B solution is prepared by a polyurethane resin hydroxyl component, xylene, a polymethacrylate solution, a fluorine-containing organosilicone solution, a silicone-free acrylic polymer, a polysiloxane-polyether copolymer, a mixture of alkaline and acidic fatty acid surface active substances, a ultraviolet absorber, a light stabilizer, a polyurethane curing accelerator, a polyethylene micronization wax and precipitated barium sulphate, quartz powder, sericite powder and rutile-structured titanium dioxide. When being in use, the A solution and the B solution are mixed and cured to form a coating. The coating has good adhesion with a micaceous iron epoxy coating and an epoxy paste coating and has excellent weather resistance and salt fog resistance. An artificial accelerated aging test shows that gloss retention of the finish can reach 80% at 3,000 h. The finish can be applied in ocean platform overhead pipelines and offshore wharf surface pipelines.

The invention relates to strippable protective coating, which is used for ocean transportation of mechanical products. The strippable protective coating comprises the following components in parts by mass: 30-50 parts of film former, 2.5-4.5 parts of ultraviolet absorber, 5-10 parts of corrosion inhibitor, 0.3-0.8 part of defoaming agent, 0.5-1 part of flatting agent, 2-5 parts of organic bentonite, 15-30 parts of pigment filler, 0.3-0.7 part of thermal stabilizer, and 60-80 parts of solvent, wherein the film former is a styrene-butadiene-styrene segmented copolymer. After forming films, the strippable protective coating has excellent salt spray corrosion resistance and ultraviolet aging resistance, has stable property in an ocean environment, and can solve the protection problem of mechanical products in ocean transportation.

The invention discloses a waterborne rust conversion polymer emulsion. The waterborne rust conversion polymer emulsion is prepared by the polyreaction of alkenyl halide monomers, monomers of (methyl)acrylic acid and esters of (methyl)acrylic acid, alkene phosphate ester monomers, a complexing agent, a compound emulsifying agent, an initiator and deionized water in an inert atmosphere at a pressure of 0.08 to 0.12MPa and a temperature of between 50 and 60 DEG C; and the percentages of dosages of all components on the basis of the total weight of all polyreaction monomers are: 75.0 to 95.0 percent of alkenyl halide monomers, 1.0 to 5.0 percent of alkene phosphate ester monomers, 5.0 to 10.0 percent of monomers of (methyl)acrylic acid and esters of (methyl)acrylic acid, 0.05 to 0.5 percent of initiator, 2 to 4 percent of compound emulsifying agent, 1.0 to 10.0 percent of complexing agent and 100 to 120 percent of deionized water. The coating prepared by the emulsion has the characteristics of good adhesive force, strong covering force, good stability, acid resistance, alkali resistance, salt spray corrosion resistance and long service life, and can be directly coated on the surfaces of metallic materials with a tight rusty layer without the rust removal treatment; and in a film-forming process, no volatile organic compounds are discharged, so that the coating of the invention is a green environmentally protected antirust coating.