Patent ID: 7341795

Claim:
A Fe—Cr alloy structure containing about 6% to about 25% by mass of Cr having a surface with at least one gap portion and having a corrosion-resistant film containing metal powder having ionization tendencies greater than iron on the surface, to a dry film thickness of about 5 μm to about 100 μm, so that the content of said metal powder in the dry paint film is about 20% to about 60% by volume, wherein the metal powder is zinc in an amount, based on the weight of the paint film, which satisfies Expression (1): 70−{2.7×(Cr+3.3Mo)}≦X≦70 (1) wherein X is the metal zinc powder content (% by mass) in the paint film, Cr is the Cr content (% by mass) in the Fe—Cr alloy, and Mo is the Mo content (% by mass) in the Fe—Cr alloy, wherein the composition of said Fe—Cr alloy structure is, in terms of % by mass, about 0.020% or less of C, about 1.0% or less of Si, about 0.5% to about 5.0% or less of Mn, about 0.05% or less of P, about 0.02% or less of S, about 6% to about 20% of Cr, about 1.0% or less of Al, and about 0.03% or less of N, with the remainder being essentially Fe and unavoidable impurities, which forms an alloy steel with a tensile strength (TS) of about 450 to abut 650 MPa.