预脱脂

说明了表面活性剂的脱脂类型酸性脱脂、碱性脱脂和溶剂型脱脂的特点以及隧道式喷淋脱脂预脱脂、隧道式喷淋磷化、磷化后洗涤和钝化等工艺常见的问题。

The characteristics of degreasing types of surfactant acidic degreasing , basic degreasing and solvent degreasing , common problems of the processes of tunnel cascade degreasing pre-degreasing , tunnel cascade phosphating , washing after phosphating and passivation etc. , were described .

采用固相萃取的方法对四种茶籽多酚样品进行预分离纯化脱脂，并用HPLC测定比较不同洗脱溶剂进行预处理的结果。

HPLC was used to determine and compare the pretreatment results of different elution solvent .

石英光纤表面电沉积Ni-Co合金镀层的研究表明，石英光纤化学性质稳定，表面光滑，化学镀前必须经过特殊的预处理工艺：脱脂，粗化，敏化，活化，烤烘等。

The study of electroplating Ni ~ Co coating on silica fiber showed that a special pretreatment must be preformed before electroless nickel because of the smooth surface of silica fiber .

预处理采用电解脱脂、电解酸洗、直线溢流漂洗工艺。

Electrolysis degreasing , electrolysis pickling and straight line flooding fulling process are adopted while pre-treatment .