Patent ID: 9080692
Filing Date: 2015-07-14
Classification: C25D,F16L,Y10T

Abstract:
1. A fuel supply pipe having corrosion resistance against fuel vapor which is provided for supplying fuel to a fuel tank, wherein the fuel supply pipe comprises: a large-diameter pipe portion through which the fuel passes; and a small-diameter pipe portion which makes an upper portion of the large-diameter pipe portion and a lower portion of the large-diameter pipe portion communicate with each other for ventilation, and a Fe—Ni diffusion layer and a softened Ni layer which is provided on the Fe—Ni diffusion layer are formed on an inner surface of at least the small-diameter pipe portion, and a thickness of the softened Ni layer is set to a value which falls within a range of 0.9 to 8.1 μm, said thickness providing an observed corrosion resistance against the fuel vapor; wherein the fuel vapor is a gasoline, light oil, bioethanol or bio-diesel fuel.