Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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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.
Equipment supplier - Lahore, Punjab, Pakistan
July 20, 2010
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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
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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.  Harry Parkes - Birmingham, UK July 26, 2010 |
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