![]() The copper coating gives the steel beneath it a weathered appearance, which is sometimes architecturally or aesthetically desirable. Copper is used to make weathering steel, also known as COR-TEN steel. That doesn’t mean that steel isn’t ever dipped in a copper coat. That’s not the effect architects, engineers, and fabricators are looking for. But steel is more reactive than copper, so if you coated steel with copper, and the copper got scratched, the steel would corrode while the copper stayed intact. Zinc is more reactive than any kind of steel, so it protects steel. Metals that are more reactive protect metals that are less reactive by losing electrons first. Stainless steel is more reactive than lead.Carbon steel is more reactive than stainless steel.Cast iron is more reactive than carbon steel.Cadmium is more reactive than cast iron. ![]()
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