Anticorrosion cast multi-element Cu-alloy simulating golden colour and its preparing process

Abstract

The invention discloses a corrosion-resistant multi-element imitation golden cast copper alloy and a manufacturing method thereof. The components thereof are as follows in percentage by weight: Cu60-84%; Zn0-35%; Al 0.5-10%; Ni 0.5-15%; Mn0 .1~8%; Fe≤5%, but not equal to 0; Ti0.01~15%; Ce0.001~5%; Sn0~8%, manufactured by conventional casting method. It uses the chemical inactivity of certain elements or forms a dense inert protective film on the surface of the copper alloy to protect the imitation gold-copper alloy from discoloration in the atmosphere; it uses certain elements to form metals with zinc, copper and other easily oxidized and discolored elements. The nature of the intermediate compound can inhibit the corrosion of elements such as zinc and copper in the atmosphere or acid rain and other corrosive media. The present invention omits expensive metals such as gold, and obtains 18K-22K imitation gold, and the processed surface and the non-processed surface are all golden yellow, which is basically the same. Soak in aqueous solution for two months without discoloration, and can withstand corrosion in 1%, 5%, 10%, 20% sulfuric acid aqueous solution for 4 days and nights.

Description

technical field [0001] The invention relates to a copper-based alloy, in particular to a corrosion-resistant multi-element gold imitation casting alloy with zinc as the secondary main component and a manufacturing method thereof. Background technique [0002] In the background technology, for large-scale open-air copper reliefs in cities, bronze statues displayed indoors and outdoors, handicrafts are generally cast with brass or bronze. These two copper alloys have black oxide skin on the outside. Although they are polished and bright, they are not durable Living in the sun, rain, acid rain, and salt spray erosion, even if they are indoors, they will change color and blacken within a few months, and finally appear patina, which cannot be cast into golden yellow. Existing handicrafts often use electricity to obtain their golden yellow. Gold plating, gilding, gold foil, ion plating titanium nitride, electroplating copper-zinc-tin ternary alloy and other methods, gold plating, ...

AI Technical Summary

Problems solved by technology

[0002] In the background technology, for large-scale open-air copper reliefs in cities, bronze statues displayed indoors and outdoors, handicrafts are generally cast with brass or bronze. These two copper alloys have black oxide skin on the outside. Although they are polished and bright, they are not durable Living in the sun, rain, acid rain, and salt spray erosion, even if they are indoors, they will change color and blacken within a few months, and finally appear patina, which cannot be cast into golden yellow. Existing handicrafts often use electricity to obtain their golden yellow. Gold plating, gilding, gold foil, ion plating titanium nitride, electroplating copper-zinc-tin ternary alloy and other methods, gold plating, gilding and gold foil method need expensive gold, although the color of ion plating titanium nitride is like gold , but not wear-resistant (such as TiN plated on the surface of stainless steel), electroplated ternary copper alloys only get light gold (about 14-18K), not wear-resistant, let alone corrosion-resistant, and will turn black indoors in 3-6 months

And due to equipment limitations, ion plating and electroplating are not suitable for large products