Question

What is the difference Between Erosion and Corrosion.

Answer 1

Corrosion is a natural process that transforms refined metals into more chemically stable forms such oxide, hydroxide, carbonate, or sulphide. It refers to the slow decomposition of things (typically metals) due to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.

Complete answer:
Corrosion is the term used to describe the chemical processes that cause things to corrode. Erosion is a physical phenomena that involves the movement of tiny fragments of rock or dirt as a result of natural forces such as gravity, water, wind, and so on. Corrosion and erosion have one thing in common: they both occur as a result of external forces acting on a surface. While these are all essential natural processes that we see and hear about on a daily basis, let us examine the differences between them.

Erosion	Corrosion
Erosion is a natural occurrence.	Corrosion is a chemical reaction that occurs when metals react with one other.
It occurs on the land's surface.	It can be found on the surface of polymers, ceramics, and metals.
Erosion is caused by natural forces such as water, gravity, and wind.	Corrosion can be caused by corrosive substances such as oxygen and sulphates.
Erosion is the result of a variety of processes, including movement, weathering, and dissolution.	Pitting, galvanic, crevice, intergranular, and selective leaching are all forms of corrosion.
Erosion can be prevented by land reform measures such as terracing or tree planting.	A protective coating is applied to the metals' surface as a preventative precaution.

Note:
Many structural alloys erode simply by being exposed to moisture in the air, but exposure to specific chemicals can have a significant impact on the process. Corrosion can be localised locally, forming a pit or fracture, or it can spread over a large region, corroding the surface more or less evenly. Corrosion happens on exposed surfaces because it is a diffusion-controlled process. As a result, techniques like passivation and chromate conversion that lower the activity of the exposed surface might improve a material's corrosion resistance. Some corrosion mechanisms, on the other hand, are less apparent and predictable.