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Ted Mooney, P.E. RET
Pine Beach, NJ

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Pickled brass components only look good for a couple of weeks

We are doing chromic acid pickling for our forged and machined products, which gives a good colour and brightness. Unfortunately this good appearance does not last beyond a couple of weeks after which the parts look dull and colour is also a faded out yellow. Please suggest a process other than lacquer that will retain the bright colour for a long time.

R.Thiagarajan
Brass forge & machine shop - Chennai, TamilNadu, India
2003

Use 20 gms per lit of Sodium Dichromate followed by a DM Water rinse before lacquer.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

2003

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