What is fretting corrosion?
Fretting corrosion is a progressive surface damage that occurs in the contact area of two metals. It is caused by very slight oscillations, vibrations or slip between the metal surfaces. Fretting corrosion is a risk for bearings and it typically occurs in the loose fit between the outer ring and the housing or between the inner ring and shaft. Uneven bearing seats and too loose fits can increase fretting corrosion. Repairing corrosion damages requires overhauling of the contact area and poses further risks of improper bearing seating. Fretting corrosion is also a risk for other metal contact areas for example yokes and core of SKF Induction Heaters and SKF Vibracon.
SKF LGAF 3E is a greasy, smooth paste with special additives to form a protective layer between the metal surfaces and reduce fretting corrosion in these and more applications.