Will the Copper Nuts also Rust under These Circumstances?

Copper nuts are widely used in industries such as faucets, valves, and electrical switches. The reason is that copper nuts have the advantages of not easy to rust, corrosion resistance, good thermal conductivity and electrical conductivity, so they are used more in rust prevention, high temperature, electrical conductivity, thermal conductivity and other working conditions.

However, recently a friend said that the copper nuts he purchased were rusted, and he suspected that it was a quality problem. Here, let me tell you that the rust of copper nuts may be caused by substandard quality, but there are many other situations that can also cause copper nuts to rust. Everyone must pay attention when using them.

Copper nuts will rust under the following circumstances:

• When the surface of copper nuts is adhered to substances containing acid, alkali, or salt, it may cause local corrosion, such as when it touches alkaline water or lime water splashed from the decoration wall during use or storage and transportation;

• Some organic juices such as vegetables, noodle soup, sputum, etc. are stained on the surface of the nut. In the presence of water and oxygen, organic acids will be produced. Over time, organic acids will corrode the surface of the copper nut;

• Polluted air containing a large amount of sulfide, carbon oxide, nitrogen oxide, etc., will form sulfuric acid, nitric acid, acetic acid, etc. when encountering condensed water. Copper nuts are exposed to such an environment and suffer chemical corrosion;

In addition, if the surface of the copper nut is deposited with dust or metal particle attachments of other metal elements, in humid air, the condensed water between these attachments and copper will connect the copper and these metal attachments into a micro-battery, producing an electrochemical reaction, which will damage the surface protective film of the copper nut and cause electrochemical corrosion.

Seeing this, everyone should understand that even copper nuts that are not easy to rust may corrode under the influence of various factors such as the use environment, not to mention other fasteners whose anti-corrosion performance is not as good as copper nuts. When choosing and using fasteners, everyone must choose according to the actual use conditions and maintain them well.

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