Which item is not a listed cause of corrosion?

Which item is not a listed cause of corrosion?

• A. Moisture
• B. Improper maintenance procedures
• C. Improper heat treatment at manufacturer
• D. Proper packaging and handling

Answer: (D)

Corrosion occurs when metal surfaces are exposed to environmental conditions that promote oxidation or electrochemical attack—primarily moisture, contaminants, and surface or material defects that accelerate the reaction. Moisture itself provides the electrolyte needed for electrochemical corrosion. If maintenance procedures are done improperly, residues, missed cleaning, or damaged protective coatings can leave the surface vulnerable to corrosion. Likewise, improper heat treatment at the manufacturer can change the metal’s microstructure or introduce residual stresses that increase susceptibility to corrosion in service. Proper packaging and handling, on the other hand, is aimed at protecting parts from moisture, contaminants, and damage. When packaging and handling are done correctly, they actually help prevent corrosion rather than cause it. So it is not a listed cause of corrosion.

Corrosion occurs when metal surfaces are exposed to environmental conditions that promote oxidation or electrochemical attack—primarily moisture, contaminants, and surface or material defects that accelerate the reaction. Moisture itself provides the electrolyte needed for electrochemical corrosion. If maintenance procedures are done improperly, residues, missed cleaning, or damaged protective coatings can leave the surface vulnerable to corrosion. Likewise, improper heat treatment at the manufacturer can change the metal’s microstructure or introduce residual stresses that increase susceptibility to corrosion in service.

Proper packaging and handling, on the other hand, is aimed at protecting parts from moisture, contaminants, and damage. When packaging and handling are done correctly, they actually help prevent corrosion rather than cause it. So it is not a listed cause of corrosion.