Which term describes the reaction that occurs within a metal when exposed to corrosive factors such as temperature, humidity, and saline?

• A. Corrosion
• B. Hardness
• C. Solubility
• D. Adhesion

Answer: (A)

Corrosion is the reaction that happens to a metal when it meets environmental factors like temperature, humidity, and saline. When water, oxygen, and salts are present, chemical or electrochemical processes can break down the metal’s surface, forming oxides or other compounds and leading to deterioration. A familiar example is rust on iron, which forms more quickly in moist, salty conditions because salts increase electrical conductivity and speed up the reaction. Higher temperatures also accelerate the process.

Hardness describes how resistant a material is to deformation, not a chemical reaction with the environment. Solubility is about how well a substance dissolves in a solvent. Adhesion is about sticking to another surface. These terms refer to different properties, while corrosion specifically captures the deterioration of metal due to environmental exposure.