Medium corrosion severity is characterized by?

Medium corrosion severity is characterized by bare pipe that shows significant deterioration, including being completely covered in rust and exhibiting some wall loss. This condition indicates a more advanced stage of corrosion where the integrity of the pipe is compromised due to prolonged exposure to corrosive elements without any protective coating. The presence of wall loss suggests that the pipe may be approaching a failure point, which could lead to leaks or ruptures if not addressed promptly.

While options discussing lesser degrees of pitting, minor rust, or surface blemishes may indicate lower severity levels of corrosion, they do not align with the characteristics of medium corrosion. For instance, minor pitting and rust coverage would be classified under a lower severity, and painted pipes with minimal rust or very minor surface blemishes fall well below the threshold of medium severity. Thus, only the depiction of bare pipe fully covered in rust with wall loss meets the criteria established for medium corrosion severity.