Patent ID: 8171886
Filing Date: 2012-05-08
Classification: A61P,B22D,C22C,C22F

Abstract:
1. A copper alloy material in wire or bar form for forming a netted structure used in seawater under harsh conditions, wherein the netted structure is exposed to water or waves running at high speed and rubbing, and wherein the copper alloy material comprises a composition including: (a) 62 to 91 mass % of Cu; (b) 0.6 to 3 mass % of Sn; (c) one or more elements selected from the group consisting of 0.02 to 1.5 mass % of Al, and 0.02 to 1.9 mass % of Si; and (d) the balance being Zn, wherein the composition satisfies the relationship derived from the Cu content [Cu], and the Sn content [Sn], in terms of mass %, 62≦[Cu]−0.5[Sn]≦90, wherein the copper alloy material has a phase structure including an α phase, a γ phase, and a δ phase, and the total area ratio of the α, γ, and δ phases is 95 to 100%, and the copper alloy material forms an Al—Sn coating or a Si—Sn coating when in seawater.