电泳工件预清洗过程简介中英对照版 Precleaning 预清洗
Stamping oils and dirt must be removed from unit before electrocoating. The stamping oil carry-over from the body shop can result in cratering in the electrocoat film:
Contamination of the paint bath may occur when oil is not removed from the metal surface. This oil becomes emulsified in the paint, causing uniform cratering on all painted surfaces. Removal of this oil from the paint is extremely difficult.
当金属表面的油污清除不净时，电泳槽液会污染，油在涂料中乳化会导致在所有的涂漆表面产生均布的缩孔，要从涂料中除去这些油是很困难的。
Oil entrapped in seams and flanges is "steamed out" during baking. The atomized oil falls upon the uncured paint and usually leaves a crater with a distinctive rough-edge appearance. This type of cratering can be extensive over the entire body but is usually concentrated in the area of the seam or flange which contained the entrapped oil.
烘干过程中，含在焊缝中的油会“蒸出”,雾化在未固化的油漆上就留下缩孔。这类缩孔严重时可以扩散到整个车身，但一般只是在含油污的焊缝或翻边区域。
Oil spots or smears on the phosphated surface can become craters or bare metal spots after electrocoating. These conditions are common on bodies that have been stored for a period of time after phosphating, permitting entrapped oil to exude from seams. The condition can also be caused by air blown onto the body to remove water from the seams. This cratering is usually localized. Particulate dirt on coated bodies is caused by filings from body shop metal- finishing operations. Often, manual vacuuming is the most efficient method for removing this dirt. Magnets in phosphate rinses have also been successful in capturing these filings.
磷化膜表面上的油点或油污电泳后会变成缩孔或露底。这些情况一般都是在车身磷化后贮存过久，夹带在焊缝中的油渗出造成的，所有磷化后的贮存区都要密闭，防止车身悬链及一般的环境污染。车身车间的金属修饰作业产生的碎屑可能成为涂漆车身上的颗粒状污物。通常， 人工真空抽吸是除去这种尘 埃的最有效方法，适当的槽液过泸做法可以大大地减少这个问题的发生，在磷化清洗中采用磁铁来收集这些碎屑的方法也已获得成功。
