| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating pretreatment method by which the throwing power of an electrodeposition coating film in an automobile body is made satisfactory. SOLUTION: An automobile body 4 is subjected to degreasing treatment and washing treatment, and is subjected to chemical conversion treatment with a chemical conversion treatment liquid, and, thereafter, the automobile body is warmed to a temperature equal to that of an electrodeposition liquid at the electrodeposition coating in a pure water washing stage. COPYRIGHT: (C)2006,JPO&NCIPI
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