10 results about "Phosphate treatment" patented technology

The present invention relates to a method for phosphating metal surfaces in a layer-forming manner using, as an activation step, an aqueous colloidal solution containing dispersed particulate components, which, in addition to a dispersed inorganic compound of a phosphate of a polyvalent metal cation, contain a polymeric organic compound as a dispersant at least partially composed of styrene and / or an α-olefin having 5 or fewer carbon atoms and at least partially composed of maleic acid, its anhydrides and / or its imides, and which polymeric organic compound further comprises polyoxyalkylene units. The washing and rinsing steps preceding the activation step, as well as the activation step itself, can be carried out using tap water, in a resource-saving manner, without loss of activation performance, using an aqueous colloidal solution containing at least 0.5 mmol / L of alkaline earth metal ions dissolved in water.

The invention relates to the field of steel piston phosphating treatment, in particular to a steel piston phosphating treatment method and system. According to the steel piston phosphating treatment method provided by the invention, through forced liquid drainage and synchronous purification, no liquid accumulation in a complex inner cavity is ensured, the defects of cross contamination and piebaldness are avoided, and the core pain point of steel piston phosphating is fundamentally solved; through the combined action of forced liquid drainage and synchronous purification, the thickness difference of phosphating films on the inner cavity and the outer surface of the piston subjected to phosphating treatment is smaller than 1 micron, corrosion resistance is uniform, and the product quality consistency is improved.

One aspect of the present invention aims to provide a cold-rolled steel sheet and a method for manufacturing the same. A preferred aspect of the present invention aims to provide an ultra-high strength cold-rolled steel sheet with excellent shape and phosphate treatment properties, exhibiting a tensile strength of 1470 MPa or higher, and a method for manufacturing the same.

The present invention relates to a process for the anti-corrosion pretreatment of a series of multiple components, each of which has at least a partial zinc and / or iron surface, at least a portion of which is initially activated in a targeted manner for subsequent zinc phosphate treatment. Targeted activation is achieved by controlled distribution of an aqueous dispersion to wet the zinc and / or iron surfaces, thus ensuring resource-saving activation. The aqueous dispersion for activation wetting contains particulate components dispersed in water, at least in part composed of hopeite, phosphophyllite, scholzite, and / or hallolite, provided as a dispersion of these crystalline solids stabilized by at least one polymeric organic compound. Again, the phosphate treatment quality of the acidic aqueous composition for zinc phosphate treatment is ensured and maintained by adding a certain amount of aqueous dispersion, particularly the same aqueous dispersion also used for activation wetting.

The application discloses a metal wire drawing process and relates to the technical field of metal wire processing. The metal wire drawing process comprises polishing, pickling, phosphating treatment and drawing treatment of the metal wire to be processed; a specific phosphating agent, ammonium polyphosphate, is used in the phosphating treatment process, a staged phosphating treatment process is used, and an activator is used to sequentially deposit a first phosphating layer with high compactness and a second phosphating layer with low compactness on the surface of the metal wire, so that the wear resistance of the surface of the metal wire is enhanced, and the adhesion of the lubricant film layer is facilitated; secondly, the metal wire passes through a lubricant with specific components in the drawing process, so that the corrosion resistance and the water-oxygen corrosion resistance of the metal wire are further enhanced, and obvious effects of preventing rust of the metal wire are achieved; in addition, the lubricant combines the wear-resistant agent with low hardness with the talc powder with soft texture, so that better lubrication is provided, and the drawing efficiency of the metal wire is improved.

The present invention relates to an acidic aqueous composition which is free or substantially free of both fluoride anions and nickel cations and which comprises at least components a1) to a5) which are different from one another, namely phosphate anions as a1), nitrate anions as a2), zinc cations as a3), copper cations as a4), and magnesium cations as a5), a concentrate for producing said composition by dilution with water, a method for using said composition for at least partially phosphating an iron surface of a substrate, a method for phosphating at least one iron surface of at least one substrate, which method comprises at least step 1), i.e., contacting at least one iron surface at least partially with the aqueous acidic composition for phosphating at least one surface of the present invention, a substrate having at least one phosphate-treated surface obtainable by said phosphating method, and a method for cold-forming said substrate having at least one iron surface, which method comprises subjecting said substrate having at least one phosphate-treated surface to a cold-forming process.

The application discloses a preparation method of a cobalt-nickel MOF derived high-capacity phosphate positive electrode material and an aqueous zinc-based alkaline battery. The positive electrode material is prepared through a two-step hydrothermal process. In the first step, cobalt-nickel MOF is prepared. In the second step, the cobalt-nickel MOF is used as a precursor to perform hydrothermal phosphate treatment, so that the positive electrode material with high surface capacity is obtained and applied to the zinc-based alkaline battery. The electrode material preparation process is simple, the electrode material is applied to the positive electrode of the zinc-based alkaline battery, the electrode surface capacity is very high, and the electrode material has excellent application prospect.

The invention provides a synergist for maintaining a steam-water system of a boiler and a preparation method of the synergist. The synergist comprises the following components: 2-6 parts of alkyl hydroxylamine, 8-35 parts of an alcohol amine composition, 3-18 parts of cyclic amine, 2-6 parts of inorganic alkali, 1-12 parts of an organic stabilizer, 0.5-8 parts of a modified silicate dispersant and 45-110 parts of water. The preparation method comprises the following steps: heating water, adding the inorganic base, sequentially adding the alkylhydroxylamine and alcohol amine composition, adding the cyclic amine and the organic stabilizer, adding the modified silicate dispersant, cooling to room temperature, and filtering to obtain the synergist for maintaining the boiler steam-water system. The comprehensive performance is far better than that of a traditional phosphate treating agent and a single-component alternative scheme, and the industrial pain point is solved.

A method of producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method including performing a phosphate treatment including adding an inorganic acid to a slurry containing a raw material SmFeN-based anisotropic magnetic powder, water, a phosphate compound, and a rare earth compound so that the slurry is adjusted to have a pH of at least 1 and not higher than 4.5 to obtain a phosphate-coated SmFeN-based anisotropic magnetic powder having a surface coated with a phosphate.

This invention provides an synergist for boiler steam-water system maintenance and its preparation method. The synergist comprises the following components: 2-6 parts alkyl hydroxylamine, 8-35 parts an alkanolamine composition, 3-18 parts cyclic amine, 2-6 parts inorganic base, 1-12 parts organic stabilizer, 0.5-8 parts modified silicate dispersant, and 45-110 parts water. The preparation method includes the following steps: heating water and adding an inorganic base, then sequentially adding the alkyl hydroxylamine and alkanolamine composition, then adding the cyclic amine and organic stabilizer, adding the modified silicate dispersant, cooling to room temperature, and filtering to obtain the synergist for boiler steam-water system maintenance. The comprehensive performance of this invention far surpasses traditional phosphate treatment agents and single-component alternatives, solving a pain point in the industry.