Question

What are two condition which promotes corrosion​

Answer 1

oxygen,air,moisture

pollutants like acid rain promotes corrosion

Answer 2

Oxygen, temperature, chemical salts are the condition which promotes corrosion​.

Explanation:

Corrosion is permanent injury or degradation of living tissue or substance due to chemical or electro-chemical reactions. The rusting of iron or steel is a prime indicator in corrosion.  

• The sources of corrosion are numerous. Which are: atmospheric oxygen, temperature, chemical salts, noise, soil moisture etc.
• Presence of an electrolyte -  Presence of a substance that conducts electricity and thus enables electrons to move and causes metal oxidation resulting in corrosion.  
• Temperature - Temperature hastens just about every chemical reaction as corrosion is exactly a chemical reaction. The higher the temperature, the quicker the corrosion.

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