| abstract |
(57) [Problem] To provide Zn having excellent long-term corrosion resistance in a freshwater environment. Provide a freshwater pipe or pipe member coated with an alloy. SOLUTION: On the surface of steel material, Mg: 0.1 A freshwater pipe and a pipe member made of a steel material containing ２０20% and / or Al: 0.1 to 60%, with the balance being Zn and a Zn alloy composed of unavoidable impurities. Further, in the Zn alloy, Si: 0.01 to Freshwater piping and piping members containing 4%. Furthermore, Z Mg and Al in the n alloy are represented by the following formula, Mg (% by mass) + Al The above freshwater piping and piping member satisfying (mass%) ≦ 60 (mass%). |