Which term defines the material's breakdown due to chemical exposure or aging?

• A. Degradation
• B. Permeation
• C. Breakthrough
• D. Diffusion

Answer: (A)

Material degradation is the deterioration of a material’s properties caused by chemical attack or aging. When a chemical interacts with a substance or the material simply ages over time, its structure can break down—leading to changes like cracking, softening or hardening, embrittlement, or loss of tensile strength. These changes reduce the material’s ability to contain or protect, which is critical when dealing with hazmat containment.

This term fits best because the question focuses on the material breaking down, not on how a chemical moves through the material. Permeation, diffusion, and breakthrough describe transport processes through a barrier: permeation is the overall movement of a chemical through the material, diffusion is the spread of molecules within the material, and breakthrough is the point at which the chemical emerges on the far side after permeation.