ELECTRIC ANTICORROSION METHOD AND APPARATUS |
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| 申请号 | EP97929520 | 申请日 | 1997-07-03 | 公开(公告)号 | EP0913499A4 | 公开(公告)日 | 1999-09-29 |
| 申请人 | HONDA MOTOR CO LTD; | 发明人 | TAKEUCHI TOSHIHIRO; IMANAKA TADASHI; | ||||
| 摘要 | In an electric anticorrosion method in which the polarity of a metal material having a film thereon is set negative, a negative polarity set period of such a metal material immersed in an NaCl aqueous solution is rendered discontinuous, and a positive polarity set period in which the polarity of the metal material is set positive is interposed between a preceding negative polarity set period and a subsequent negative polarity set period. This polarity switching is carried out by a polarity switch relay provided between the metal material and a DC power source. Although the corrosion of the metal material is prevented in a negative polarity set period, the separation of a film starting at a damaged portion occurs. In a positive polarity set period, an electrolytic product is formed on an exposed portion of the metal material, and the separation of the film in the subsequent negative polarity set period is prevented by this electrolytic product. This enables the corrosion of a film-carrying metal material to be prevented, and the separation of the film ascribable to the corrosion prevention of the metal material to be minimized. | ||||||
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