Failure state:
Bearing rust and corrosion will cause rings, rolling rust, Pear skin shape rust and rolling element rolling surface interval the same pit-like rust, all rust and corrosion.

Reasons:

Water, corrosive substances (paint, gas, etc.) the intrusion of inappropriate lubricants.

As accompanied by water droplets due to condensation of water vapor.

Stall when the high temperature and humidity.

 During transport is antirust bad.

Keep status is inappropriate.

Inappropriate using.

Measures:

Improve the seal.

Study way of lubrication.

Stall when the anti-rust measures.

Improve the storage method.