METAL RUSTING - ENVIRONMENTAL FACTORS

METAL RUSTING - ENVIRONMENTAL FACTORS 


The red or orange coating that forms on the surface of the metal when it is exposed to air and moisture, consisting chiefly of ferric hydroxide and ferric oxide formed by oxidation is known as rusting. The rusting of metal may cause soil pollution and becomes hazardous too. 

image source - https://monroeengineering.com/blog/how-to-prevent-steel-from-rusting/

There are some factors from the weather that affect the rate at which rust forms. 

MOISTURE:

The climate has different approach to the metal. In a hot and dry climate, metal is less prone to rusting than in humid or wet climate. Rust is the byproduct of the process " corrosion ". This process happens when the metal reacts with oxygen in water. If the metal is dry all time, it will rust and if it is constantly exposed to rain, it will rust too. 

TEMPERATURE: 

Heat is a major factor when it comes to rusting. Higher temperatures are associated with higher rate of corrosion. Thus temperature affect how fast can a metal rust. There will be less rusting in winder and more rusting in summer. However, the change can happen based on other factors too - a lower temperature with high humidity can cause the metal to rust fast.

ACID RAIN: 

Although rain will speed up the rate of corrosion, acid rain will accelerate much more. Acid rain is caused by the chemical reaction due to the release of sulphur dioxide and nitrogen oxides in air. This can be caused due to pollution, unregulated industry and also natural occurrences such as volcanic eruption. 

Though steel has the property of getting rusted when exposed to air and moisture, they do have other properties that enhances the work ability of the metal. The steel corrosion can be prevented by applying several types of coating above it. 

- NANDHINI  





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