CPC B60C 9/0007 (2013.01) [B32B 15/015 (2013.01); C25D 5/10 (2013.01); C25D 5/50 (2013.01); D07B 1/066 (2013.01); D07B 1/0646 (2013.01); B60C 2009/0014 (2013.01); D07B 2501/2046 (2013.01)] | 4 Claims |
1. A steel cord for rubber reinforcement, comprising at least one strand of a plated steel wire, wherein the plated steel wire comprises a plating layer of Cu—Co—Zn and has a concentration gradient in which the Co content ratio (Co/(Cu+Zn+Co)) in a region from an outside surface of the plating to ¼ of the plating layer is 40% or more and up to ½ of the plating layer 20% or more compared with the Co content ratio in the entire region of the plating layer, wherein the plating layer of Cu—Co—Zn is a ternary alloy sequentially plated on a surface of a steel wire in the order of Cu→Co→Zn followed by thermal diffusion.
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