33results about How to "Improve dezincification corrosion resistance" patented technology

The invention relates to a rare earth stannum copper alloy, belonging to the technical field of the alloying of metal material and the anti-corrosion; the invention comprises copper, zinc, stannum, aluminum, nickel, manganese, antimony, boron, mischmetal containing mainly light rare earth elements such as lanthanum and cerium, each component element takes up the weight proportion as: copper 69-71%, stannum 0.5-1%, aluminum 0.1-0.5%, nickel 0.1-0.5%, manganese 0.1-0.6%, antimony 0.01-0.05%, boron 0.002-0.02%, mischmetal containing mainly light rare earth elements such as lanthanum and cerium 0.02-0.2%, the rest is taken by zinc and impurity with the total volume of no greater than 0.05%, the sum up of each component element is 100%. The invention aiming at the high corrosion resistance requirements by a condenser tube for heat exchange, via optimized design and multiple test, is finished to improve the anti-stress corrosion rupture performance, and level up the anti high C1^-, NH₄⁺, S^2- ion density corrosion performance of polluted water.

The invention discloses a low-lead brass alloy. The low-lead brass alloy comprises 61.5-63.5% of copper and 0.02-0.15% of arsenic and also comprises less than or equal to 0.3% of nickel, less than or equal to 0.1% of aluminum, less than or equal to 0.2% of lead, less than or equal to 0.1% of manganese, iron and tin and the balance Fe and unavoidable impurities, wherein the content of the unavoidable impurities is less than or equal to 0.2%. The low-lead brass alloy reduces an alloy manufacturing cost, improves cutting ability and improves dezincification resistance.

The invention provides elastic alloy brass with high strength, relating to the field of copper alloys. The elastic alloy brass with the high strength is characterized in that the strength and elasticity of the alloy are improved through adding elements of tin and phosphorus on the basis of a copper-zinc binary alloy; the alloy brass comprises the following components in percentage by weight: 59.0-65.0 % of copper, 0.2-1.5 % of tin and 0.015-0.15 % of phosphorus as well as the balance of zinc and not more than 0.05 % of inevitable impurities; and the alloy is prepared by smelting and rolling. The elastic alloy brass with the high strength, provided by the invention, has the advantages of reasonable mixing ratio design and higher performance cost; compared with the copper content of 93.0 % in the tin-phosphorus brass, the copper content in the alloy brass is reduced by 28.0 % and domestic scarce resource copper metal is saved. The elastic alloy brass with the high strength, provided by the invention, is mainly used for manufacturing electronic appliance connectors, springs, connectors, switches, contacts and the like as well as various copper alloy parts used under the marine environment; hardness and elastic modulus which are equivalent to those of the tin-phosphorus brass are obtained; and good dezincification corrosion resistance is also obtained; and the tin-phosphorus brass can be partially replaced with the elastic alloy brass.

The invention relates to the field of copper alloys for toilet and kitchen industries, and provides a preparation method of an anti-dezincification lead-free bismuth arsenic brass pipe. The preparation method comprises the steps of casting as a copper ingot-extrusion as a copper pipe blank-stretching-annealing-inspection of a finished copper pipe-warehousing of the finished copper pipe after smelting of the following raw materials in percentage by mass: 61-63% of Cu, 0.5-0.9% of Bi, 0.07-0.12% of As, 0.5-0.8% of Al, 0.08-0.24% of Sn, Pb not more than 0.1%, and the balance of Zn and impuritieswith a total amount not more than 0.25%.

The invention relates to the field of copper alloys for the bathroom and kitchen industry and provides a preparing method for an anti-dezincification leadless bismuth arsenic extruded brass rod. The preparing method comprises the step of smelting 61-63% of Cu, 0.5-0.9% of Bi, 0.07-0.12% of As, 0.5-0.8% of Al, 0.08-0.24% of Sn, smaller than 0.1% of Pb, the balance Zn and smaller than or equal to 0.25% of impurities to obtain the solid brass rod by the processes of lead casting and extruding.

The invention relates to the field of copper alloys for kitchenware industries, and provides a production method of an anti-dezincification and unleaded lead-cast brass ingot which is good in anti-dezincification corrosion property, high in strength, and good in machining property. The production method comprises the steps that the following raw materials of, by mass, 61-63% of Cu, 0.5-0.9% of Bi,0.07-0.12% of As, 0.5-0.8% of Al, 0.08-0.24% of Sn, less than 0.1% of Pb and the balance Zn and impurities with the total amount being less than or equal to 0.25% are smelted, and then subjected to lead casting, and the brass ingot is prepared.

A low-cost lead-free dezincification corrosion-resistant brass alloy for casting. The brass alloy contains: 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.05-0.8 wt. % of Al, 0-0.1 wt. % of Sn, and 0.05-0.16 wt. % of As, with the balance being Zn and inevitable impurities. Moreover, the equivalent weight of zinc X meets the requirements of the following formula: 35%<X<39.5%, and X=(B+ΣCiKi/(A+B+ΣCiKi); in the formula, X is the equivalent weight of zinc in the complex brass, A is the copper content (%), B is the actual zinc content (%), Ci is the content (%) of the other alloy elements, and CiKi is the corresponding equivalent weight of zinc of various elements.

The invention relates to the field of copper alloys for toilet and kitchen industries and provides a method for preparing dezincification-resistant, lead-free, low-silicon and low-arsenic brass tubeswhich are good in dezincification corrosion resistance, high in strength and good in processing performance. The method comprises the steps of smelting the following raw materials in percentage by mass: 62%-65% of Cu, 0.6%-1.0% of Si, 0.07%-0.12% of As, 0.5%-0.8% of Al, 0.03%-0.1% of Fe, Pb less than 0.1% and the balance of Zn and impurities with the total amount not more than 0.35%, casting to form copper ingots, extruding to form copper tube billets, stretching, annealing, inspecting the finished copper tubes and putting the finished copper tubes into a warehouse.

The invention discloses a brass material for water heating equipment. The brass material comprises the following components in percentage by mass of 62-63.5% of Cu, 0.27-0.81% of Si, 0.35-0.41% of Bi, 0.11-0.19% of Al, 0.12-0.21% of Mn, 0.025-0.06% of Ce+Nd+Os, 0.004-0.005% of B, 1.21-2.15% of Sn+Ni+Co, 0.42-0.9% of Mg, 0.05-0.08% of Sb, 0.03-0.057% of P and the balance of zinc and inevitable impurities. The brass material for the water heating equipment is easy to cut, high in strength and excellent in corrosion resistance.

The invention relates to the field of copper alloys for kitchen and bathroom industries and provides a dezincification-resistant lead-free low-silicon arsenic brass which is good in dezincification corrosion resistance property and processing property and high in strength and a preparation method of the dezincification-resistant lead-free low-silicon arsenic brass. The method includes the steps that the following raw materials including, by mass, 62-65% of Cu, 0.6-1.0% of Si, 0.07-0.12% of As, 0.5-0.8% of Al, 0.03-0.1% of Fe, less than 0.1% of Pb and the balance Zn and no larger than 0.35% ofimpurities in total amount are smelted, refined and subjected to furnace front detection and casting, and then a low-silicon arsenic brass ingot of which the content of Pb is less than 0.1% is obtained.