Question

explain the method of rusting? explain five ways by which rusting can be prevented in detail?

Answer 1

When iron reacts with water in the presence of air and dust to formits oxides ,this process is called rusting.

Or

When any iron (object or) surface is continuously in contact with moisture and air, we can see the surface of that object starts turning red. That red layer is formed because iron reacts chemically with the moisture and forms iron oxide. This red layer of iron oxide is called rust and this process is called as rusting.

Exposure to outdoor conditions will increase the risk of rust, especially if the climate is rainy or humid. The best ways to prevent rust include:

1. Using rust resistant alloys

2. Design considerations

3. Galvanization

4. Bluing

5. Organic coating

6. Powder coating

7. Regular maintenance

Answer 2

Whenever you get iron, water and oxygen together, you get rust.


Rusting can be prevented by following ways:-




Plating: Metals that can rust can be covered by less reactive metals or non-reactive metals.


Alloying: This is the mixture of two or more metals or non-metals. Metals which cannot wear easily are melted into their molten form and are used to cover metals which rust easily. This stops the iron or alloy from rusting.


Coating: The surfaces of iron or metal are coated with paint or grease.


Cathode Protection: This is the method of protecting iron from rusting by connecting it by wires to a more reactive metal such as magnesium or zinc. This method is used when dealing with underground metallic pipe lines and tanks.


Galvanizing the Iron: This is when the iron is coated with a layer of zinc. The zinc reacts with the environment rather than the iron.