| 摘要 |
PROBLEM TO BE SOLVED: To provide a duct anti-rust method which is easily applicable to a duct whose circumferential environment is narrow, such as a duct attached to a bridge assembled into a multistage, and which achieves anti-rust effect over a long term.SOLUTION: A duct anti-rust method for preventing rust on an outer peripheral surface of a duct 10 includes: applying an oil-based rust-preventive agent 12 having no curing characteristics to the surface of a cloth material 11; winding the cloth material 11 with the oil-based rust-preventive agent 12 applied thereto around the outer peripheral surface of the duct 10; and covering, with a jacket material 15, the duct 10 with the cloth material 11 wound therearound. |
