| 摘要 |
PROBLEM TO BE SOLVED: To provide a crude oil tank having excellent corrosion resistance almost equivalent throughout the entire crude oil tank including a welded joint and being capable of inhibiting the formation of a corrosive product (sludge) containing solid sulfur. SOLUTION: The crude oil tank is constructed by welding a steel material containing as basic components 0.001 to 0.2% (in terms of mass %, and this shall apply hereinbelow) C, 0.01 to 2.5% Si, 0.1 to 2% Mn, 0.01 to 1.5% Cu, 0.001 to 0.1% Al, and 0.001 to 0.01% N and further containing at least either of 0.01 to 0.5% Mo and 0.02 to 1% W. Its corrosion resistance is improved throughout the entire crude oil tank by inhibiting the local corrosion of a joint by setting each of the Cu content of the welding metal of the welded joint/the Cu content of the steel material and (the Mo content + W content of the welding metal)/(the Mo content + W content of the steel material) at 0.15 to 3. COPYRIGHT: (C)2005,JPO&NCIPI
|
