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topic 3604

Cleaning anode bags


We clean our Nickel anode bags with Nitric Acid. This removes Nickel Oxide and small Ni fragments. The problem is that the bags are remaining acidic after several rinses. Can we neutralize the remaining Nitric Acid with a Sodium Hydroxide solution or will we drag in Sodium and Nitrates into our Ni baths?

Doug Nash
- El Cajon, California


At what labor costs vs what bags cost, why waste the chemicals, time? Waste treatment costs would be about the same for the bags as the spent strip. One way to not cause too much of a problem would be to put them in a 5 gal bucket or a small tank, agitate very well, add 1N sodium hydroxide until a ph meter read about 8, repeating until the pH remained above 7.

Your problem will not be with the acid affecting your nickel pH, the addition of nitrates is very bad for most nickel plating solutions. Why risk loosing a nickel tank, parts and customers to save a few pennies.

Talk to Jim's Plating Supply in Cincinnati for affordable bags. No relation, just a friend.

James Watts
- Navarre, Florida

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