Tarnishing of Bronze Bronze is incredibly robust and durable, although it is not as malleable as copper. It can be fashioned into strong and attractive items. Bronze tarnishes and develops a green patina over time due to its copper content. This happens when the copper combines with moisture and air, oxidizing. The metal may also tarnish if exposed to light or chemicals. However, this can be removed with a little clean sanding.
Bronze does not melt like silver but will burn if enough heat is applied for long enough. If you put a thin piece of paper on top of a bronze object, it will burn the paper because the heat is sufficient to damage the sheet metal underneath.
If you leave water inside a hollow bronze object, it will rust. This is because water is a magnet for metals with oxygen in their structure. Hollow objects take longer to rust than solid ones because there is less surface area to interact with water. However, if you were to submerge the object in liquid nitrogen, which has no oxygen, that would prevent further oxidation. Then you could keep it frozen until it decomposes.
Bronzes are all too easy to scratch, so use caution not to wear them down too much. You can restore some of the luster to a dull bronze by rubbing it with a soft cloth; do not use steel wool or other abrasives because they will continue to etch the metal away.
The color of bronze can vary from light yellow to dark brown or black. When exposed to sunlight, bronze will turn grayish-white.
Copper has been used for water pipes since 1872 when they were first installed in New York City. Today, nearly all drinking water flows through pipe made from some type of metal. Brass is the common name for any of several heavy metals that form alloys with zinc and with other elements such as phosphorus or sulfur. When molten together, these metals have a lower melting point than either element alone. After cooling, the alloy is hard enough to be useful. All brass contains some amount of copper but it may also contain zinc, magnesium, aluminum, silicon, iron, and/or lead.
Bronze was originally made by adding tin to copper. But because most tin now is sold with gold or silver, bronze mostly contains only copper these days. Though both bronze and copper are malleable when hot, they become harder as they cool. This makes bronze more durable than copper for use in objects where strength is important such as plumbing fixtures.
White bronze contains copper, yet, contrary to popular belief, it does not tarnish. This is why it is so popular. Some folks even love to plate with it. However, like any other metal, white bronze will wear over time due to constant contact with water and dirt. This means that it will need to be repolished from time to time.
Copper is a common ingredient in many household products. It is also used in many things including plumbing, wiring, and paint. Although most of this copper goes into useable items, some does get lost into soil or drains. This is where it can cause problems for those who are sensitive or allergic to copper.
Those who are only mildly concerned about containing their environmental impact might want to consider these facts: Copper has been used for thousands of years and does not seem to be having that many effects on the environment. Also, because it is an essential element needed for life, it would likely find its way into the environment even if we didn't use it in technology every day.
In conclusion, white bronze does not appear to be harmful to humans and does not seem to hurt animals either. It is also useful for keeping households clean as well as safe. These are all good reasons to include some in your home!