In HF service, carbon steel forms a protective fluoride scale in dry concentrated acid. Loss of the protective scale through high _________ or turbulence will result in greatly accelerated corrosion rates.

Question

Quizplus · Accepted Answer

Carbon steel can withstand dry concentrated acid due to the formation of a protective fluoride scale on the surface. However, high velocities or turbulence can cause the scale to be removed, exposing the steel to the acid and resulting in accelerated corrosion rates. High temperature or pressure does not directly affect the formation or maintenance of the protective scale, making options A and B incorrect.

In HF Service, Carbon Steel Forms a Protective Fluoride Scale