Copper tarnish is composed of CuO, and the basic carbonate if moisture and air are present. It can be removed by solutions containing the ammonium ion, which forms the soluble ammonia complex. The commercial preparation Brasso is an example.
mysite.du.edu/~jcalvert/phys/copper.htm mysite.du.edu/~jcalvert/phys/copper.htm
Copper Pots: To remove tarnish from copper pots, rub with lemon halves dipped in salt. ... Ideally you should clean copper bottoms after each use, even though the tarnish does not affect cooking results or the pan's efficiency. Do not use an abrasive cleaner or steel wool to clean copper bottoms.
www.doityourself.com/stry/copper www.doityourself.com/stry/copper
Re: Why does copper tarnish to form patina? Area: Chemistry ; Posted By: Scott Hawkins, Metallurgist, Metallurgy, Bisalloy Steels (company); Date: Sun Oct 5 23:19:35 1997; Area of science: Chemistry ; ID: 874601217.Ch...
www.madsci.org/posts/archives/dec97/876143644.Ch.r.html
Clean all the copper and brass around your home quickly and inexpensively with this trick. ... Looking for a low-cost, low-elbow grease way to clean the copper and brass around your home? Then, try this: ... The acetic acid in the vinegar and the sodium in the baking soda works together to dissolve the tarnish.
frugalliving.about.com/od/cleaningtipsandrecipes/qt/Tar... frugalliving.about.com/od/cleaningtipsandrecipes/qt/Tarnish_Remover.htm
I just cleaned an old copper lamp and want the old brown tarnished finish back. Any tips on how to speed up the brown tarnishing on copper? (I don't want the green tarnish finish.) Thanks!
www.finishing.com/1600-1799/1746.shtml
I'm trying to find a dipping solution that will remove tarnish from copper and brass, and will prevent the tarnish from building up again. ... Tarnish on Copper Lamps made from sheets appears as small spots after a period of time (30-45 days) even though they are packed in airtight plastic bags on completion of polishing.
www.finishing.com/2600-2799/2609.shtml
Looking for the best products to clean, polish and remove tarnish from your Sterling, Silver Plate, Brass & Copper? Is your Silver Plate dull and need replating? Tired of cleaning your Sterling Silver Plate, Brass & Copper every few months?
www.metalbrite.net/page/1316883
United States Patent 3410703 ... US Patent References:; Vinyl halide resin containing a substituted tin mercaptide; - - 2888435; Process for the production of organo sulfur compounds; - - 3012077; Silver polish; - - 2841501; ... Anti-tarnish composition for coppercontaining surfaces; - - 3248235;
www.freepatentsonline.com/3410703.html
"Copper Tarnish Removal" is one of the many Cleaning tips at LifeTips. Find related Cleaning advice in the "Kitchen Cleaning" category. ... Still, if they're not properly maintained, pots and pans, especially those made of copper, can tarnish. If this has happened to you, you can rest easy knowing there are options.The...
cleaning.lifetips.com/tip/96713/kitchen-cleaning/kitche... cleaning.lifetips.com/tip/96713/kitchen-cleaning/kitchen-cleaning-tips/copper-tarnish-removal.html
> use a mixture of at least 90% tin with the balance made up of copper, antimony, bismuth or silver. Comstock Creations in Durango, Colorado, USA, who makes beautiful clocks, uses a composition of 97% tin with the balance made up of copper, bismuth, and silver. ... Under normal conditions, it will not tarnish, rust,
www.roseindia.net/articles/what-fine-pewter.page