| 摘要 |
PURPOSE:To surely adhere an anticorrosive to an entire exposed surface, by a method wherein a magnetic fluid prepared by mixing a ferromagnetic fine powder and the anticorrosive with an org. solvent is allowed to fill an object to be treated and subsequently drained therefrom while the org. solvent is volatilized from the remaining magnetic fluid. CONSTITUTION:A ferromagnetic fine powder such as magnetite or various ferrites and an anticorrosive such as mineral oil are dispersed or dissolved in an org. solvent such as kerosene to obtain a magnetic fluid. Next, one end of water piping 1 formed by connecting a plurality of straight pipes 10 by a joint 20 is closed and filled with the magnetic fluid from the other end thereof and, subsequently, said magnetic fluid is drained. At this time, because the magnetic fluid remains on the entire surface of the ferromagnetic metal containing the iron exposed surface 11a of a steel plate 11 in an adhered state, if the solvent is volatilized from the magnetic fluid adhered to the exposed surface, the anticorrosive can be uniformly adhered to the entire inner surface of the pipe.
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