What term best describes surface wear on a wire rope sling due to rubbing or sliding?

The term that accurately describes surface wear on a wire rope sling resulting from rubbing or sliding is abrasion. This phenomenon occurs when the surface of the wire rope comes into contact with another surface, such as a rough or sharp edge, leading to the gradual erosion of the rope material. Abrasion can significantly weaken the integrity of the wire rope, making it essential for operators to regularly inspect slings for any signs of wear to ensure safety.

Corrosion refers to the chemical deterioration of metal over time, often due to environmental factors like moisture or chemicals, which is different from the physical surface wear described in this question. Fraying is specific to fibers coming apart in a textile or fiber sling, indicating a breakdown of the material structure rather than wear from friction. Fatigue is a term related to material failure due to repetitive stress over time, but it does not specifically pertain to surface wear caused by rubbing. Thus, abrasion is the best fit for the described condition in this scenario.