PIPE PROVIDED WITH CORROSION PREVENTION LAYER ON THE OUTSIDE SURFCE, PROCESS FOR PRODUCTION OF THE SAME, AND PROCESS FOR PRODUCTION OF ALLOY WIRES USED FOR THE CORROSION PREVENTION LAYER

摘要

Disclosed is a pipe made of an iron-base material, having a corrosion prevention layer formed on the surface thereof. The corrosion prevention layer includes a Zn-Sn sprayed coating including Sn in a content of more than 1% by mass and less than 50% by mass and the balance composed of Zn. Alternatively, the corrosion prevention layer includes a Zn-Sn-Mg sprayed coating including Sn in a content of more than 1% by mass and less than 50% by mass, Mg in a content of more than 0.01% by mass and less than 5% by mass and the balance composed of Zn. Preferably, the sprayed coating of the corrosion prevention layer includes at least any one of Ti, Co, Ni and P, and the content of each of these elements is more than 0.001% by mass and less than 3% by mass.