| 摘要 |
PROBLEM TO BE SOLVED: To suppress the excessive convertion of the electric potential of titanium clad steel into the baser one, to buffer the hydrogen absorbing embrittlement therein and to maintain its durability by providing titanium clad steel joined to a steel structure in which the submerged part is subjected to electric corrosion prevention with a metallic material having a natural electric potential baser than that of the steel and joining it with the steel. SOLUTION: The submerged part 2 in seawater of the steel pipe pile 1 of a landing bridge 7 is, e.g. fitted with a voltaic anode 3, which is subjected to electric corrosion prevention. Moreover, titanium clad steel 5 having high corrosion resistance is coiled directly below a droplet zone and a tide zone 4 severe in corrosive environments in the steel pipe pile 1, and its corrosion resistance is moreover increased. In this steel structure, from the tide seawater face of the titanium clad steel 5 to below about 1 m, a metallic material 8 with a planar, helical or netty shape or the like of copper, a copper alloy, stainless steel, cupro, a nickel base alloy or the like having a natural electric potential baser than that of the steel is coiled, and, moreover, this metallic material 8 is welded and joined to the steel pipe pile 1. In this way, protective current is flowed on the metallic material, and it is made hard to flow on the titanium clad steel to prevent hydrogen absorption.
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