Gem Bids For 1620 Passivation Chemical For Manganese Based Phosphating Chromic Acid I. C: - 1000250130 De-greasing Chemical For Maganese Based Phosphating Caustic Soda 40% I. C: - 1000250127 De-rusting Chemical For Maganese Based Phosphating Phosphoric Acid I. C: -1000370128 Pickling Chemical For Manganese Based Phosphating Hydrochloric Acid I. C: - 1000370129