What Does Scoring Mean?
Scoring is a type of abrasive wear, referring to a rough surface, usually with cuts. It appears as long scratches in the direction of motion.
Scoring increases the adhesive ability of the surface. Scoring is also known as galling, seizing or scuffing.
Corrosionpedia Explains Scoring
Scoring refers to transfer of metal from one component to another under sliding contact. This process is caused by lack of adequate lubrication under extreme pressure. It is a severe form of adhesive wear, and occurs due to the tearing out of small particles that weld together as a result of overheating (due to high-contact pressure and/or high sliding velocity) of sliding surfaces, permitting metal-to-metal contact.
Scoring is also a method of obtaining very sharply defined bends in metal sheets. The angle of the bend is determined mainly by the amount of material removed from the groove. It allows rapid and accurate work to specific angles, and parts being soldered stay in place during heating.
In gears, pitting occurs when continuous high-pressure forces act on the surface of the gear teeth. Pitting, in turn, can cause scoring. Scoring can be identified by radial scratch lines. In high-speed operations, like aerospace gears, gear scoring occurs due to the vaporization of oil film and welding occurs between the gear teeth to form the scoring.
Scoring can also be used to evaluate the ability of a coating to resist delamination by corrosion.