Corrosion-resistant copper alloy

Abstract

The invention discloses a corrosion-resistant copper alloy, which comprises the following compositions by weight percent: 1.0-1.2% of Mn, 0.5-0.7% of Si, 0.05-0.15% of Fe, 0.8-1.2% of Mg, 2-4% of Zn, 11-13% of Al, 1.2-1.4% of Ti, 0.3-0.5% of Sc, 5.5-6.5% of Ni and 0.2-0.3% of composite mischmetal, wherein the composite mischmetal contains La and Ce mischmetal elements, the percentage of Ce is 30-50%, and the balance is Cu.

Description

Technical field [0001] The invention relates to the technical field of copper alloys, in particular to a corrosion-resistant copper alloy. Background technique [0002] The tube bundle materials currently used in seawater environment mainly include aluminum brass (typical representative is: C68700, whose composition is 76-79wt% Cu, 1.8-2.5wt% Al, and the balance is Zn), tin brass (typical representative is :C44300, its composition is 70~73wt% Cu, 0.8~1.2wt% Sn, 0.06wt% Fe, 0.02~0.06As, the balance is Zn), nickel white copper (typical representative is: C70600, its composition is 9.0~11wt %Ni, 1.0~1.8wt%Fe, 1.0wt%Mn, 1.0wt%Zn, the balance is Cu; C71500, its composition is 29~33wt%Ni, 0.4~0.7wt%Fe, 1.0wt%Mn, 1.0wt %Zn, the balance is Cu), stainless steel (typically represented by 1Cr18Ni9Ti, 0Cr18Ni9Ti, 00Cr19Ni10 and 00Cr18Ni12Mo2) and titanium alloy (typically represented by TA2). [0003] The limitations and deficiencies of the above-mentioned tube bundle materials used in seawa...

AI Technical Summary

Problems solved by technology

[0003] The limitations and shortcomings of the above-mentioned tube bundle materials used in seawater corrosion environment are: aluminum brass and tin brass have low strength, dealloyed component corrosion (dezincification, dealumination) and serious erosion corrosion, etc.; nickel cupronickel has high cost , processing is difficult and other defects; titanium alloy and stainless steel have problems such as high cost and serious marine biological pollution

[0004] The application number is CN200610039282.1, and the patent titled "Seamless copper alloy tube for heat exchanger with excellent corrosion resistance and its preparation method" provides a seamless copper alloy tube for heat exchanger. On the basis, elements such as boron, nickel, and manganese are added to improve the corrosion resistance of the pipe, but copper-nickel alloys are prone to electrochemical corrosion, and tin brass has always had the problem of poor erosion and corrosion resistance, which limits seawater desalination The unit can only be used at low flow rates

[0005] Another example is that the patent application number CN200710106263.0 provides a production process for aluminum bronze alloy tubes and rods. The alloy ingots containing copper, aluminum, nickel, and iron are finally extruded. The alloy is corrosion-resistant through actual use. The performance is not very good, and the copper alloy cannot be drawn into pipes, which limits its application