46results about How to "Improve throwing power" patented technology

A surface treatment with a zirconium ion that enables sufficient throwing power and superior anti-corrosion properties to be exhibited when thus surface treated metal base material is subjected to cation electrodeposition coating is provided. A metal surface treatment liquid thereof for cation electrodeposition coating includes zirconium ions, copper ions, and other metal ions, and having a pH of 1.5 to 6.5, in which: the other metal ions are at least one selected from the group consisting of tin ions, indium ions, aluminum ions, niobium ions, tantalum ions, yttrium ions and cerium ions; the concentration of zirconium ions is 10 to 10,000 ppm; the concentration ratio of the copper ions to the zirconium ions is 0.005 to 1 on a mass basis; and the concentration ratio of the other metal ions to the copper ions is 0.1 to 1,000 on a mass basis.

The invention discloses methyl sulfonate tinning electrolyte using cerium salt as an additive. The electrolyte comprises the following components: 30 to 120 g/L of stannous methyl sulfonate, 60 to 180 g/L of methylsulfonic acid, 1 to 10 g/L of cerium sulfate, 0.1 to 2 g/L of antioxidant, 5 to 10 g/L of brightening agent and 5 to 10 g/L of surfactant. The invention also discloses a method for tinning a steel strip or a steel plate by adopting the electrolyte. During plating, the cerium salt in the electrolyte lightens the harm degree of 'hydrogen brittleness', and plays roles of the antioxidant and the brightening agent. On the basis of adaptability to the environment, the electrolyte meets the requirements that the process is simple, the solution is stable, the maintenance is easy and the quality of a coating is high.

A composition and method for electroplating a metal on a substrate. The composition has a chloride to brightener concentration ratio of from 20:1 to 125:1. The method of electroplating, which employs the composition, employs pulse patterns that improve physical properties of metal surfaces.

The present invention provides a chemical conversion solution and the surface treating method for realizing high corrosion resistance and high coating adhesion of the metal surface, as well as high throwing power during electrodeposition, and generating no sludge.

A chemical conversion solution comprising (A) at least one compound selected from water-soluble germanium compound, water-soluble tin compound, and water-soluble copper compound, (B) at least one compound selected from water-soluble titanium compound and water-soluble zirconium compound, (C) at least one water-soluble nitrate compound, (D) at least one compound selected from water-soluble aluminum compound and water-soluble magnesium compound, (E) at least one water-soluble zinc compound, and (F) at least one fluorine compound, and, the coating process for the metal structure.

A low energy snow making gun having at least one but preferably three operational stages each having at least one pair of small aperture water outlets which are oriented at a divergent angle to generate a respective pair of narrow angled water droplet streams which do not interfere with each other until they have reached a distance from the gun. A second pair of water outlets may be provided on each stage with each pair on each stage oriented at a divergent angle to maintain singularity of the streams over a distance thereby increasing the throwing power of the gun.

The invention discloses tin plating electrolyte. The tin plating electrolyte comprises the following components 60 to 90g/L of tin methane sulfonate, 10 to 30g/L of tin sulfate, 110 to 140mg/L of p-cresolsulphonic acid, 60 to 120mg/L of sulfosalicylic acid, 30 to 50g/L of phosphinic acid, 45 to 70mg/L of 2,2-PySSPy, 15 to 25mg/L of 8-hydroxyquinoline, 20 to 30mg/L of catechins, 10 to 15g/L of 2,2-dihydroxy diethyl sulfide, 5 to 10mg/L of hexadecylpyridinium bromide, 8 to 12 g/L of dodecyl-phenol polyoxyethylene ether, 5 to 10g/L of ethylene glycol, 4 to 8g/L of benzalacetophenone, 5 to 10g/L of sodium hexametaphosphate, 4 to 8g/L of sodium dodecyl sulfate, and the balance of deionized water. According to the tin plating electrolyte, Sn2<+> can be effectively restrained to convert into Sn4 <+> in an electrolytic process by improving an electrolyte formula, and the stability of plating solution is improved; and meanwhile, the throwing power of the electrolyte is increased, and the luminance, the corrosion resistance and the welding performance of tin coatings are improved.

A multilayer coating film which comprises:a cationic electrodeposition coat formed from an epoxy-based cationic electrocoating composition containing 5 to 300 millimoles of sulfonium group and 50 to 2,000 millimoles of carbon-carbon unsaturated bond per 100 g of the resin solid content, with carbon-carbon triple bond accounting for at least 15% of said carbon-carbon unsaturated bond; anda top coat formed thereon.

The invention relates to a processing technique of an oil delivery pipe, belonging to the technical field of alloy processing. The technique comprises the following steps: machining alloy steel to obtain an oil delivery pipe blank; carrying out electroplating treatment on the oil delivery pipe blank in a 20-30-DEG C nickel-electroplating solution by an auxiliary anode electroplating technique, wherein the electroplating solution is composed of 5-7 g/L zinc oxide, 110-130 g/L sodium hydroxide, 0.6-1 g/L nickel and 150-300ml of additive; sequentially carrying out polishing treatment, passivating treatment and rust prevention treatment on the electroplated oil delivery pipe blank to obtain an oil delivery pipe semifinished product; and carrying out seal treatment on the oil delivery pipe semifinished product to obtain the oil delivery pipe finished product. The oil delivery pipe has reasonable component combination; and under the synergistic actions of the component elements, the zinc-nickel alloy is electroplated on the surface by the auxiliary anode electroplating technique, the passivating treatment and rust prevention treatment are then carried out, and finally, the seal treatment for silanization treatment is carried out to further enhance the corrosion resistance and mechanical properties of the oil delivery pipe.

The methods inhibit or reduce dimpling and voids during copper electroplating of through-holes with flash copper layers in substrates such as printed circuit boards. An acid solution containing disulfide compounds is applied to the through-holes of the substrate followed by filling the through-holes with copper using an acid copper electroplating bath which includes additives such as brighteners and levelers.

Direct current plating methods inhibit void formation, reduce dimples and eliminate nodules. The method involves electroplating copper at a high current density followed by electroplating at a lower current density to fill through-holes.

The invention discloses a preparation method of reverse copper foil. The preparation method of the reverse copper foil comprises the following steps of electrolytic bath arrangement, addition agent addition, stirring operation, primary electroplating operation, primary roughening operation, primary curing operation, secondary electroplating operation, secondary roughening operation, secondary curing operation, cleaning operation, anti-oxidation treatment and drying operation. A titanium iridium anode plate and a titanium roller are adopted, an electrolytic solution is used in an electrolytic bath, specifically, the copper content of the electrolytic solution ranges from 130g/L to 220g/L, and the sulfuric acid content of the electrolytic solution ranges from 70g/L to 100g/L. When addition agents are added, the electrolytic solution is heated to enable the temperature to range from 45 DEG C to 50 DEG C, and 5-10 parts of WH-001 addition agents, 3-5 parts of WH-002 addition agents and 2-3parts of WH-003 addition agents by mass are added to 1000 parts of electrolytic solutions by volume every hour. When the secondary electroplating operation is conducted, 5-10 parts of WH-004 additionagents by mass are added. When the secondary roughening operation is conducted, 5-15 parts of WH-005 addition agents by mass are added, and the secondary roughening operation is accomplished. By theadoption of the technology, the potential barrier of metal nucleation is reduced, the nucleation speed is increased, high-density copper particle crystals can be formed on the surface of the copper foil, the non-uniformity degree of the surface is reduced, the mechanical property of the copper foil is improved, and therefore the tensile strength and the peeling resistance strength of the copper foil are improved.

The invention belongs to the field of electroplating, and particularly relates to a preparation method of a metal surface plating layer structure applicable to an ocean severe corrosion environment. The preparation method of the metal surface plating layer structure applicable to the ocean severe corrosion environment comprises the following steps of S1, pretreating a metal matrix; S2, preparing anon-cyanide cadmium plating layer; S3, preparing a rare-earth modified chromate low-chromium passivation layer; and S4, preparing a hydroxyl graphene modified confining bed. The plating layer prepared through the method provided by the invention is good in corrosion resistance, capable of remarkably prolonging the service life of the metal matrix, and suitable for the ocean severe corrosion environment.