METALS AND THEIR TREATMENT_化学配方数据库_化工助手

化工产品及用途数据库香料库颜料库染料库化学配方数据库畅销药物查询系统药物化学大辞典 FDA药品批准信息 FDA药品独占权信息 FDA药品专利信息 DMF提交信息库

化学配方数据库

配方类型：	METALS AND THEIR TREATMENT
配方说明：	Pretreating Aluminum for Painting
配方组成：	Water/1 liter Zinc Carbonate/71 g. Chromic Acid/140 g.
配制方法：	Mix until dissolved and add gradually to a 2% gelatin solution until the pH is between 4 and 5. Degrease the surface; clean chemically or mechanically; and passivate by this solution.