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Beware the ‘bronze disease’
LIKE copper, bronze is used for making different kinds of household items, including decorative pieces. These decorative items look good so long as they don’t get discoloured due to humidity, as in the rainy season. Bronze is basically a copper alloy. In modern times, bronze is an alloy of copper and any metal, except zinc. It is generally more expensive than brass and more corrosion-resistant. Bronze forms a patina (green colour) which is protective to the metal and is often seen on artwork. When reproduced, it is called Verde. Bronze deteriorates rapidly if exposed to moisture and chlorides or sulfides. Solid bronze often is lacquered at the factory to protect its finish. Lacquered bronze only needs dusting and an occasional wiping with a damp cloth. Brush the dust away Keep bronze pieces as
clean as possible. Accumulations of dust and dirt can eat into the
metal surface. Dust regularly using a soft cloth. Do not rub too
vigorously, especially on any protruding parts. If a bronze piece has
been neglected for a long time and is covered with grime, thoroughly
clean it with a soft brush. Remove all dust from crevices and notches
and then lightly rub the entire surface with a soft flannel cloth. |
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Shine time If you want a high polish, dip a cloth into liquid wax and apply to the piece. When dry, buff lightly to a high gloss. This wax treatment also may be given to bronze pieces that are kept outdoors. Weathered bronze usually darkens; however, this is natural and does not harm the piece. A bronze cleaner can be made at home from salt, vinegar and flour. Dissolve 1 teaspoon salt in 1 cup of white vinegar. Add enough flour to make a paste. Apply the paste to bronze and let it sit for 15 minutes to 1 hour. Rinse with clean, warm water and polish dry. Prevent corrosion "Bronze disease" is one of the most serious hazards that afflicts bronze. This disease, caused when chlorides and oxygen combine in a damp environment, also attacks brass and pewter. The disease takes the form of a sudden outbreak of small patches of corrosion and is distinguished by rough, light green spots. "Bronze disease" usually can be stopped by washing the piece in repeated changes of boiling hot, distilled water. You may have to soak the object for a week or more in distilled water.— CB |
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