39results about How to "Stable corrosion resistance" patented technology

The invention relates to a kind of corrosion-resistant and erosion resistant coating material, which in detail is a corrosion-resistant material for cable bridge surface. The invention adds flaky zinc powder concentration for traditional dacromet coating formulation, adds penetrating agent, surface active agent, hardening agent and rare earth material. The coating layer on the surface is characterized by high adhesion power, good wearing resistant performance, good antiweatherability and stable chemically-resistant property, and suitability for wild environment utilization for a long time, which as long as 30 years.

An antistatic paint is prepared through mixing ethyl n-silicate with absolute alcohol, stirring, alcoholysis reaction, dropping hydrochloric acid diluted by purified water to make pH=2-3, laying aside, adding organic silanamine, stirring, adding zinc powder and stirring. Its advantages are high electrostatic conductivity and corrosion resistance, low cost, fast dry, and high firmness of film.

The invention discloses silver-free and brittle fracture-resistant 18K rose gold and a processing technology thereof. The silver-free and brittle fracture-resistant 18K rose gold comprises the following components in percent by weight: 0.2-0.4wt.% of Ba, 0.6-0.8wt.% of V, 1.2-1.6wt.% of Ni, 1.0-1.2wt.% of Sb, 8.0-12.0wt.% of In, 74.0-76.0wt.% of Au and the balance of copper. The invention providesnovel silver-free 18K rose gold and the processing technology thereof, and the characteristic of low-temperature brittle fracture of the conventional rose gold is avoided. Through the innovation andoptimization of the alloy components, the development bottleneck of a 18K red gold material for jewelries is broken through; implementation and industrialization of the material achieve plenteous economic results and social benefits.

The invention discloses high-temperature and corrosion resistant aluminum-containing austenitic stainless steel and a preparation method. The high-temperature and corrosion resistant aluminum-containing austenitic stainless steel comprises, by weight, 15%-30% of Ni, 15%-25% of Cr, 2.5%-8% of Al, 1%-3% of Mo, 0.1%-1% of Si, 0.1%-2% of Nb, 0.02%-0.2% of C, 0.02%-0.2% of Y/Hf and the balance Fe. According to the aluminum-containing austenitic stainless steel, the content of Cr is increased to 15-25 wt.%, the content of Al is increased to 2.5-8 wt.%, the aluminum-containing austenitic stainless steel contains Cr and Al elements with the enough high content, both Cr and Al are key elements for improving the oxidation resistance, and the high content of Cr and Al contributes to formation of an Al-Cr oxidation film. A stable and compact Cr2O3 oxidation film can be formed on the surface of the alloy, and the oxidation resistance of the material is improved; and meanwhile, the Al2O3 oxidation film can be formed on the surface of the alloy in an oxidizing atmosphere, the Al2O3 layer is good in thermodynamic stability, low in growth rate and more protective in an extreme environment, and the Al can further form a large number of B2-NiAl phases in a matrix. The using temperature of the material in a high-temperature oxidizing atmosphere is increased, the corrosion resistance of the material is improved, and the material can be used in a high-temperature extreme environment.

The invention provides an aluminum and aluminum alloy passivation solution, preparation method and using method thereof; the raw material ratios of the passivation solution are as follows: 3-5g/L of zinc chromate, 0.5-1g/L of cobaltous sulfate, 2-3g/L of zirconium sulfate, 0.5-1.5g/L of sodium fluoride, 2-4g/L of nitric acid, 1-2g/L of citric acid, and the rest amount is water. A passivation working solution (bath solution) which is prepared by diluting the passivation solution is stable, low concentration, fast in passivation speed, low void ratio of the obtained passivation film, is able to form a yellow chromate film layer on surface of the aluminum product, has an excellent anti-corrosion property, and is able to greatly increase the paint or coating layer adhesive force on the work piece. The property of the formed passivation film for resisting neutral salt mist is more than 120 hours.

An antistatic anticorrosion paint is prepared through mixing epoxy resin E42, meta-xylene phenolic resin, organosilicon resin, dibutyl o-benzoate and ethyl n-silicate, adding Ti powder, stirring, adding absolute alcohol or ethanediamine, and stirring. Its advantages are high electrostatic conductivity and corrosion resistance, low cost, fast dry and firm film.

The invention discloses Li and Sn gold alloy for 14K red gold with low-temperature brittle fracture inhibition. The alloy comprises, by weight, 0.2-0.4wt.% of Li, 0.4-0.6wt.% of V, 1.5-1.8wt.% of Sn,2.0-2.4wt.% of Al, 12.0-20.0wt.% of Ag, 57.0-59.0wt.% of Au and the balance of copper. The problem about lag in technology that existing 14K red gold materials are low-temperature brittle is solved; through innovation and optimization of alloy composition, the bottleneck of the 14K red gold material for jewelry is broken through; the implementation of the material and the industrialization can predictably achieve substantial economical results and social benefits.

The invention discloses Li-containing and Re-containing gold alloy capable of inhibiting low-temperature brittleness and used for 10K red gold. The alloy comprises the following components in percentage by weight: 0.2 to 0.4 percent of Li, 0.3 to 0.5 percent of Re, 0.2 to 0.3 percent of Ti, 3.0 to 4.5 percent of Sn, 25.0 to 32.0 percent of Ag, 41.0 to 43.0 percent of Au and the balance of copper.The patent solves the existing conditions that the current 10K red gold material has low-temperature brittleness and the technology falls behind. The development bottleneck of the 10K red gold material for jewelry is broken through by innovating and optimizing the alloy components. Through prediction, implementation and industrialization of the material can achieve plenteous economic gain and social benefit.

The invention discloses a yellow Miao silver alloy with the features of low density, light weight and corrosion resistance, and a technology thereof. The yellow Miao silver alloy comprises, by weight,0.8%-1.2% of Li, 3.0%-4.0% of Al, 4.0%-6.0% of Mg, 0.4%-0.6% of B, 0.5%-0.8% of Sc, 10.0%-15.0% of Zn, 30.0%-50.0% of Ag and the balance copper. According to the yellow Miao silver alloy, a light-weight selection scheme is provided for Miao silver alloy in China, and the obtained product not only has excellent yellow appearance, but also is extremely resistant to hydrogen sulfide corrosion. The requirements of product update of the jewelry industry and the industry upgrade in China can be promoted through the implementation and industrialization of the yellow Miao silver alloy effectively.

The invention provides a passivation solution which is prepared by dissolving various raw materials in deionized water. The materials comprise 6-9 g/L of chromium sulfate hexahydrate, 2-4 g/L of cobalt sulfate heptahydrate, 4-8 g/L of sodium chlorate, 2-3 g/L of ammonium fluoride, 1-2 g/L of sulfuric acid, 2-3 g/L of citric acid and the balance water. According to an obtained passivation film, the corrosion resisting property is good, a salt spray test can be kept for 120 h or longer, the workpiece surface has no white rust or white spot, the porosity is low, and no sealing agent is needed for treatment.

The invention discloses a lightweight yellow low-silver alloy with excellent die casting performance and a process thereof. The alloy comprises, by weight, 0.5-0.8% of Sr, 15.0-18.0% of Al, 10.0-12.0% of Mg, 0.5-0.8% of Be, 4.0-5.0% of Mo, 20.0-24.0% of Zn, 29.0-31.0% of Ag and the balance copper. A lightweight selection scheme is provided for our Tibetan silver alloy through the alloy, and the obtained product has excellent yellow look and is extremely resistant to hydrogen sulfide corrosion. Through implementation and industrialization of the alloy, the demands for product upgrading and industrial upgrading in China's jewelry industry can be effectively promoted.

The invention discloses a high-hardness and anti-corrosion yellow low silver content alloy for Miao silver jewellery and technology thereof. The high hardness and anti-corrosion yellow low silver content alloy comprises, by weight, 0.3-0.5wt.% of P, 0.2-0.4wt.% of C, 0.5-0.8wt.% of Li, 0.3-0.5wt.% of W, 1.0-1.5wt.% of Y, 8.0-1.0wt.% of Zn, 5.0-8.0wt.% of Ni, 40.0-50.0wt.% of Ag, and the balance copper. The material provides a solution for Chinese Miao silver alloy in materials science. Miao silver products have yellow color after processing, and the alloy has excellent high-hardness performance. Implement and industrialization of the material is capable of effectively promoting jewelry industry product renewal and industry upgrading in China. Difficulty in the industry can be overcome, andmeanwhile, abundant economic and social benefits can be obtained.

The invention discloses a Miao silver alloy used for nickel-free high-elasticity-modulus jewelry resistant to hydrogen sulfide corrosion and a process of the Miao silver alloy. The alloy comprises 0.3wt%-0.5 wt% of B, 2.0 wt%-3.0 wt% of Mg, 0.8 wt%-1.0 wt% of Ge, 1.5 wt%-1.8 wt% of In, 1.2 wt%-1.5 wt% of Y, 4.0 wt%-6.0 wt% of Fe, 40.0 wt%-50.0 wt% of Ag and the balance copper. The material provides a solution of material science for the Miao silver alloy in China, Miao silver products are environment-friendly and do not cause allergies after being machined, and the alloy has excellent corrosion resistance. By means of implementation and industrialization of the material, the product renewal requirement of the jewelry industry in China and the requirement of industry upgrading can be effectively promoted.

The invention discloses a Ba and Ge containing gold alloy for corrosion-resisting and deformation-resisting 10K rose red gold. According to the weight percent, the alloy comprises components including0.3 wt.%-0.5 wt.% of Ba, 0.2 wt.%-0.4 wt.% of Zr, 1.0 wt.%-1.5 wt.% of Ge, 0.3 wt.%-0.5 wt.% of W, 20.0 wt.%-25.0 wt.% of Ag, 40.0 wt.%-42.0 wt.% of Au and the balance Cu. The Ba and Ge containing gold alloy avoids the phenomenon that current 10K rose gold fades in the usage process. Through alloy component innovation and optimization, the development bottleneck of jewelry 10K rose gold materialsis broken through. It can be predicted that abundant economic gains and social benefits can be obtained due to material implementation and industrialization.