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Locking in the brightened brass/copper shine

Belonging to a progressive organisation engaged in production of various types of parts & equipment made from brass and copper, I mostly confront with the situation where our products return to dim and dark position (as of pre- brightening stage) some times quite quickly whereas at occasions it takes a few days for the polish to diminish.

55388 photo

Ali Hussain
Equipment supplier - Lahore, Punjab, Pakistan
July 20, 2010

A. You need to utilize a tarnish preventive compound among other possible steps i.e. packaging,storage,etc.

Gene Packman
- Great Neck, New York
July 24, 2010

A. Sounds very much like poor rinsing or failure to dry quickly and adequately. I am guessing that these products are being treated in bulk. Parts need good movement in rinses to ensure that they acid-free. Suggest that you improve rinsing and then to give them a degree of additional tarnish resistance, wash in benzotriazole ⇦ on eBay or Amazon [affil link] or soap solution followed by more rinsing. The final rinse should preferably be hot to aid drying and improve water repellency. Note these treatments are not a substitute for good rinsing in the first place.
Can supply more detail if required.

Harry Parkes
- Birmingham, UK
July 26, 2010

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