| 摘要 |
PROBLEM TO BE SOLVED: To provide a welded joint and a welded structure which are excellent in corrosion resistance under environment where they are exposed to salt caused by seawater and high temperature and high humidity and environment which contains sulfur which comes from oil or the like without applying painting and electric corrosion protection especially the welded joint and the welded structure which are raised in the corrosion resistance to local corrosion and crevice corrosion. SOLUTION: In this welded joint, mutual base metal is welded and the welded joint satisfies under formula (5), (6) and (7): 0.30≤[A<SB POS="POST">Al</SB>]/[B<SB POS="POST">Al</SB>]≤3.0...(5), 0.30≤[A<SB POS="POST">Cu</SB>]/[B<SB POS="POST">Cu</SB>]≤3.0...(6) and 0.30≤[A<SB POS="POST">Cr</SB>]/[B<SB POS="POST">Cr</SB>]≤3.0...(7). In the formula, [A<SB POS="POST">Al</SB>] means the content (mass%) of Al which is contained in the weld metal in the welded part, [B<SB POS="POST">Al</SB>] means the content (mass%) of Al which is contained in the base metal, [A<SB POS="POST">Cu</SB>] means the content (mass%) of Cu which is contained in the weld metal in the welded part, [B<SB POS="POST">Cu</SB>] means the content (mass%) of Cu which is contained in the base metal, [A<SB POS="POST">Cr</SB>] means the content (mass%) of Cr which is contained in the weld metal in the welded part, and [BCr] means the content (mass%) of Cr which is contained in the base metal. COPYRIGHT: (C)2012,JPO&INPIT |
