| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrolytic phosphating treatment method that forms a film by causing a large current to flow at a voltage as low as possible and can improve efficiency. SOLUTION: Electrolysis is executed between a metal used as an electrode, that is the same as a metal of a nitrate of an electrolytic phosphating treatment bath, and a work by using a D.C. power source in the electrolytic phosphating treatment bath comprising: phosphoric acid; zinc, iron or manganese being a metal capable of dissociating phosphoric acid and dissolving in phosphoric acid; and a solution obtained by dissolving a nitrate of a metal becoming a film component, wherein anions other than nitrate ions and metal ions other than the metal ions becoming the film component are contained in an amount of≥0.5 g/L, the metal ion formed by the dissolution of the nitrate is contained in an amount of≥10 g/L, and phosphoric acid and phosphate ion are contained in an amount of≤1/2 of the metal ion formed by the dissolution of the nitrate. COPYRIGHT: (C)2007,JPO&INPIT
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