| 摘要 |
PROBLEM TO BE SOLVED: To provide steel for a crude oil tank of a welded structure, which shows excellent resistance to general corrosion and local corrosion occurring in crude oil in a crude oil tank made from steel, and further inhibits the formation of a corrosion product (sludge) containing solid S; a crude oil tank; and a method for preventing the corrosion thereof. SOLUTION: The steel for the crude oil tank includes, by mass%, 0.001 to 0.2% C, 0.01 to 2.5% Si, 0.1 to 2% Mn, 0.03% or less P, 0.007% or less S, 0.01 to 1.5% Cu, 0.001 to 0.3% Al, 0.001 to 0.01% N, as basic components, further includes one or two of 0.01 to 0.08% Mo and 0.01 to 0.5% W; thereby shows the resistance to the general corrosion and local corrosion in an environment in the crude oil tank; and further inhibits the formation of the corrosion product (sludge) containing solid S. COPYRIGHT: (C)2009,JPO&INPIT |
