Steam exposure: All copper metals are resistant to attack by pure steam, but if there is much carbon dioxide, oxygen, or ammonia present, the steam condensate may be harmful. Dry atmosphere way from the seacoast will produce the least surface discoloration, while industrial and marine atmospheres will produce maximum coloration.įresh water exposure: Copper tubing is commonly used for fresh water piping. In effect, the extremely long life of copper metals is due mainly to the fact that their oxidized surfaces protect them from further deterioration.Ĭopper metals offer excellent resistance to industrial, rural, and marine atmospheres. It is protected by the surface oxidation, which is generally not soluble in water, and which adheres tightly to the surface, preventing exposure to further environmental corrosion. ![]() Therefore, the metal itself does not deteriorate. However, this tarnish, or patina, affects only the appearance and not the matrix of the metal. ![]() However, since corrosion is a reaction of a metal’s surface to its environment, deterioration does not take place until the corrosion penetrates the surface.Īll copper metals react quickly to their environment and form a film of surface oxidation. Corrosion is usually defined as a deterioration or failure of metal by chemical or electrochemical processes. ![]() One of the most outstanding and certainly the most complex features of copper metals is their corrosion resistance.
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