Question

Which of the following is/are the classic cases of fretting corrosion?

(a) Bolted tie plates on railroad rails

(b) Press-fitted ball bearing race on a shaft

(c) On ball bearings

(d) Bolted tie plates on railroad rails and press-fitted ball bearing race on a shaft

This question was posed to me in examination.

This is a very interesting question from Eight Forms in section Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct option is (d) Bolted tie plates on railroad rails and press-fitted ball bearing race on a shaft

Easiest explanation: Fretting corrosion occurs at contact areas between materials under load subjected to vibration or repeated relative motion. And it doesn’t occur on materials in continuous motion such as on ball bearings.