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

Abstract

An anticorrosion golden Cu-alloy contains Cu (60-84 wt.%), Zn (0-35 wt.%), Al (0.5-10 wt.%), Ni (0.5-1.5 wt.%), Mn (0.1-8 wt.%), Fe (0-5 wt.%), Ti (0.01-15 wt.%), Ce (0.001-5 wt.%), and Sn (0-8 wt.%)and is prepared by conventional casting. Its advantages are golden colour without decolouring, and high resistance to atmosphere corrosion, NaCl solution, and sulfuric acid solution.

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, large-scale open-air copper reliefs used in cities, bronze statues displayed indoors and outdoors, and 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 a...

AI Technical Summary

Problems solved by technology

[0002] In the background technology, large-scale open-air copper reliefs used in cities, bronze statues displayed indoors and outdoors, and 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, gold plating and gold foil methods 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