What is uniform etch?

What is uniform etch?

• A. Pitting
• B. Localized anodic areas
• C. Uniform etch is uniform attack over the entire surface area causing dulling
• D. No visible change

Answer: (C)

Uniform etch means the metal is attacked evenly across the entire surface by the corrosive environment. Because the whole surface wears away at about the same rate, you don’t see pits or localized roughness; instead the finish becomes dull and non-reflective. This is different from pitting, which comes from localized anodic areas and creates pits, and from no visible change, which would imply little or no attack. So uniform etch is best described as a uniform attack over the entire surface area causing dulling.

Uniform etch means the metal is attacked evenly across the entire surface by the corrosive environment. Because the whole surface wears away at about the same rate, you don’t see pits or localized roughness; instead the finish becomes dull and non-reflective. This is different from pitting, which comes from localized anodic areas and creates pits, and from no visible change, which would imply little or no attack. So uniform etch is best described as a uniform attack over the entire surface area causing dulling.