Definition
The ability of a material to withstand chemical or electrochemical attack from its environment, such as oxidation, moisture, salt, or industrial pollutants, without significant loss of strength, dimension, or surface integrity.
Plain English
How well a material holds up against rust, pitting, and other forms of damage caused by exposure to air, water, or chemicals.
Context Anchor
Seen in aircraft maintenance when choosing materials, inspecting metal parts, applying protective coatings, and checking aircraft exposed to moisture or salt air.
Derivation
From Latin corrodere, meaning 'to gnaw away.' Corrosion 'eats' the metal slowly. Resistance is simply how well the material stands up to that gnawing.
Why Pilots Care
Aircraft parts lose strength when corrosion advances, so materials with good resistance keep structures safe over time.
Intuition Check
Corrosion resistance does not mean a part can never corrode. It means the part, material, or coating is better able to slow down or withstand corrosion under expected conditions.
Example Sentence 1
Stainless steel was chosen for the firewall because of its high corrosion resistance in a hot, moist environment.
Example Sentence 2
The technician applied a protective coating to improve corrosion resistance on the landing gear.