A loss of diameter due to corrosion of more than what percentage is a reason for removing the rope from service?

A loss of diameter due to corrosion of more than 10% indicates a significant reduction in the rope's strength and integrity. Corrosion can lead to pitting, thinning, and ultimately compromise the rope’s ability to handle loads safely. When the diameter of the rope decreases by this percentage, it is likely that the rope has lost a considerable amount of its working load limit, making it unsafe for continued use.

The threshold of 10% is set as it provides a clear safety margin. At this level of wear, the rope's performance can no longer be reliably guaranteed, and it poses unnecessary risks in applications where safety is paramount, such as in lifting or towing situations. Thus, identifying this percentage as a critical point for removal helps prevent accidents and ensures that safety standards are maintained.