39results about How to "Extend corrosion resistance time" patented technology

A steel skeleton of a greenhouse shed comprises an inner chord and an outer chord which take a circular arc shape as a whole and are connected by a 'zigzag' connecting rib in the middle. The steel skeleton is characterized in that the outer chord is made from an 'I'-shaped sectional material which comprises a wide surface and a narrow surface, the surface of the outer chord connected with the 'zigzag' connecting rib is the narrow surface, and the other surface is the wide surface for uplifting a shed film. The 'I'-shaped sectional material of the greenhouse shed integrates the advantages of strong bending resistance of a steel pipe and long corrosion resistance time of reinforcing steel bar overcomes the disadvantages of poor corrosion resistance and short service life of the steel pipe and poor bending resistance of the reinforcing steel bar, and has functions for unique innovation of laying a double-layer shed film and internally providing an insulating layer so that the greenhouse shed constructed by the sectional material improve snow resistance, wind resistance and internal thermal insulation, thus filling a gap for facility agriculture.

The invention belongs to the field of reinforced concrete, and discloses carbon-nanotube-modified reinforced concrete resistant to chlorine salt corrosion and a preparation method thereof. According to the preparation method, chemical applied force and a physical method are combined to make carbon nanotubes dispersed in a polyvinyl alcohol solution, and after a carbon nanotube / polyvinyl alcohol prepolymer solution even in distribution and good in combination is obtained, the prepolymer solution serving as a composite modification agent is added into a cement matrix to obtain a carbon nanotube-polyvinyl alcohol-cement-based composite material even in dispersion. According to the method, the reinforcing effects of the hydroxy carbon nanotubes and polyvinyl alcohol are fully combined into thecomposite modified cement-based material, and not only does the concrete have unique advantages in terms of mechanical properties, but also the porosity can be reduced; by changing an internal microscopic dielectric constant, mobile charges are captured, the formation of corrosive batteries is prevented, corrosive current in the reinforced concrete is significantly reduced, and the corrosion resistance time of the reinforced concrete is prolonged.

The invention relates to a high-salt-fog-resistance aluminum product passivator which is an environment-friendly passivator having excellent adhesive force and high corrosion resistance, remarkably prolonging the corrosion resistance time and containing no phosphate, nitrite or other toxic heavy metal ions. The aluminum product passivator mainly comprises the following components: fluozirconate, chromic sulfate, sodium hydroxide, fluoride salt, nitrate, nickel salt and water. A preparation method of the aluminum product passivator comprises the following steps: mixing the fluozirconate and the fluoride salt, dissolving in water; fully dissolving the chromic sulfate in water of 70-75 DEG C, then adding into the former solution, and evenly mixing; and then, sequentially adding the sodium hydroxide, the nitrate and the nickel salt into the mixed solution, evenly stirring, and adding water to a specified volume, thus obtaining the aluminum product passivator. The method is simple to operate and short in processing time; and the aluminum product passivator can be repeatedly used. Thus, the cost can be saved.

The invention discloses a corrosion-resistant and anti-rust paint and a preparation method thereof, belonging to the field of paints. In the present invention, the anti-rust active material is added into the curing agent according to the mass ratio of 2~5:10~20, stirred and mixed at 50~60°C to obtain the mixed matrix, calculated in parts by mass, taking 200~300 parts of the mixed matrix, 30 ~50 parts of preservative additives, 5~10 parts of titanium dioxide, 2~7 parts of talc, 8~15 parts of lecithin, 8~13 parts of hydrogenated castor oil, 7~12 parts of glass flakes, 3~6 parts of γ‑ Aminopropyltriethoxysilane, 80~150 parts of water, stirred and mixed at 60~70°C for 40~50min to obtain corrosion-resistant and antirust paint. The invention solves the problems of poor adhesion and poor corrosion resistance of existing antirust paints.

The invention discloses a one-step method non-phosphorus skin film agent which comprises the ingredients by mass percent: 2-4% of fluorine zirconic acid, 0-1% of sodium molybdate, 0-0.8% of potassium fluotitanate, 2-3.5% of polyethylene glycol, 0.1-0.6% of sodium fluoride, 0.5-1.5% of acrylic acid, 0-1% of citric acid, 0-1.5% of oxalic acid, 0.1-0.5% of emulsifier and the balance of water. Unoiling and skin film coating are accomplished in one process, and a whole pretreatment process is accomplished through twice washing, so that the conventional six processes are greatly simplified, and the equipment investment is reduced.

The invention discloses a silver discoloring preventive intermediate, a composition and discoloring preventive silver and a preparation method. The intermediate is a mixed solution comprising tetraethoxysilane, boric acid, bismuth nitrate and an organic solvent, wherein the weight ratio of tetraethoxysilane to boric acid to bismuth nitrate is 10-13: 1.5-3: 7-10. The composition is a glass body andcomprises silicon dioxide, diboron trioxide and bismuth trioxide based on the weight ratio of 30-35: 10-15: 50-55. The discoloring preventive silver is synthesized by the following steps: (1) mixingboric acid and tetraethoxysilane organic solutions to obtain a solution A; (2) mixing the solution A and bismuth nitrate to obtain the silver discoloring preventive intermediate; (3) soaking silver inthe silver discoloring preventive intermediate; moving out; and forming an intermediate layer on the surface of silver; and (4) thermally processing the intermediate layer; heating; and then decreasing the temperature to obtain the discoloring preventive silver. With the adoption of the silver discoloring preventive intermediate, the color remaining time of the discoloring preventive silver can be prolonged, and meanwhile, the corrosion resisting effect of the discoloring preventive silver can be improved.