配方类型：	METALS AND THEIR TREATMENT
配方说明：	Acid Pickling Solutions Chromic nitrate
配方组成：	Sodium nitrate/4 oz/gal Chromic acid/24 oz/gal
配制方法：	Operating Conditions Temp. 60-90F Time 2-20 min.** **Bath maintained at pH of 0.0 to 1.7. Construction Details Ceramic, stainless or tanks lined with lead, synthetic rubber or vinyl base materials. Comments Removal of mill scale and burnt-on graphitic lubricants. Effective as a preclean for welding. Metal Removal; Mils: 0.5

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