What term describes environmental cracking that can occur very rapidly and cause failure before inspection can identify damage?

• A. Environmental Cracking
• B. Uniform Corrosion
• C. Pitting
• D. Erosion

Answer: (A)

Environmental cracking refers to cracks that form and grow because of the combined action of the environment and applied or residual stresses. This type of cracking can progress rapidly, so a component may fail even if there’s little obvious surface damage and inspection hasn’t yet detected it. It’s different from simple material loss or surface degradation.

Uniform corrosion describes even thinning of material across the surface, not cracking. Pitting is localized corrosion creating small holes, not cracks. Erosion is mechanical material loss from moving fluids or particles, not a chemical or stress-driven crack.