What is corrosion give any three method for prevention of corrosion
Answers
Answer:
Corrosion is a process where the water or the moisture on the surface of the metal oxidizes with the atmospheric oxygen, it is an oxidation reaction. ... Less reactive metals like lead and copper are used to roof situations.
PREVENTION :-
•Avoid exposure to Corrosive Agents: Prevent the deterioration of metals by limiting its contactwith corrosive agents.
•Proper Monitoring of Metal Surface: Carefully monitor the metal surface.
•Prevent Galvanic Corrosion
•Protect the Metal Surface
•Metallic Plating
Answer:
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Prevention:
1. Coating with paints or oil or grease: Application of paint or oil or grease on metal surfaces keep out air and moisture.
2. Alloying: Alloyed metal is more resistant to corrosion. Example: stainless steel.
3. Galvanization: This is a process of coating molten zinc on iron articles. Zinc forms a protective layer and prevents corrosion.
4. Electroplating: It is a method of coating one metal with another by the use of electric current. This method not only lends protection but also enhances the metallic appearance.
Example: silver plating, nickel plating.
5. Sacrificial protection: Magnesium is more reactive than iron. When it is coated on the articles made of iron or steel, it acts as the cathode, undergoes reaction (sacrifice) instead of iron and protects the articles.
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