What is the primary cause of corrosion in metal components?

The primary cause of corrosion in metal components is exposure to moisture and oxygen. When metal is subjected to these two elements, a chemical reaction occurs that leads to the formation of rust and other corrosion products. In the presence of water, oxygen can react with the metal surface, often forming oxides that weaken the structural integrity of the metal over time. This process is particularly prevalent in environments with high humidity or where metal components are frequently exposed to rain or water.

While high temperatures can accelerate the corrosion process, they are not the fundamental cause. Similarly, lack of lubrication is more associated with wear and tear than with corrosion itself. Exposure to sunlight can lead to certain types of degradation in materials, particularly non-metallics, but it is not a direct agent of corrosion in metals. Therefore, moisture and oxygen stand out as the primary factors that initiate and sustain corrosion in metal components.