Erosion vs Corrosion
Both erosion and corrosion are natural processes that have different results on the surfaces they act upon. They are totally different from each other in the sense that while erosion takes small rocks and pebbles to newer places, corrosion is chemical in nature as it causes changes in the composition of the surface it takes place. People confuse between erosion and corrosion and cannot differentiate between these two natural processes. This article will remain all doubts regarding these processes by highlighting their features.
First of all, erosion is not breakage of rocks as many people believe and it only refers to movement of small fragments of rocks from one location to another under the influence of gravity that is coupled with blowing winds, flowing water or melting ice of the glaciers. Weathering makes rock particles loose ands it is only then that natural agents like water and wind can move them away to newer locations. Remember, if rock pieces are falling under gravity, it is not called erosion and only when they are under the influence of a natural agent does the process called as erosion.
Corrosion, as told above, is a chemical process and takes place on the surface of some substances such as metals. Metals have loose electrons that they lose by the action of moisture and oxygen. Corrosion of metals is actually their oxidation in the presence of moisture and can be seen in daily life as when one observes an exposed part of a car getting corroded. In corrosion, there is an irreversible chemical reaction that changes the chemical composition of the metal and leads to formation of its oxide. You must have also seen iron pipes carrying water getting corroded because of their oxidation. This is also called rust which is brown in color and comes in your hands when you try to scratch it with a sharp object.
Difference Between Erosion and Corrosion
• Erosion refers to movement of small fragments of rocks under the influence of gravity and a natural agent such as water, winds or melting ice.
• Corrosion refers to change in the chemical composition of some surface (mostly metals) because of the action of oxygen in the presence of moisture
• Erosion can be prevented to an extent by afforestation and planting more trees on terraces where as corrosion can be prevented by putting on a protective layer on the surface of metals such as paint.
• Erosion does not change the chemical composition of the fragments that are carried away while corrosion leads to the formation of a totally new substances (such as rust in the case of corrosion of iron)