The rusty reason for NSK motor bearing

Motor bearing NSK bearing  rusty reason very complex, may be NSK bearing imports antirust processing is bad, may also be caused by corrosion of water, as well as by the paint mist can cause corrosion. Then I'll tell you explain it in detail.

Most motor factory used insulating paint volatile acid composition mainly has four kinds:

No reactions of low molecular paint raw acid composition ( anhydrous isopropyl neighbor and terephthalic acid, anhydrous maleic acid, fumaric acid ).

The paint curing is generated when the acid composition ( with phenolic paint, by formaldehyde water into formic acid ).

The heat or oxidative decomposition of fatty acids ( formic acid, acetic acid ).

The paint curing water decomposition generated acid composition. Insulating paint the main component of acid is formic acid, formic acid amount and corrosion degree there is a close relationship between the.

Grease absorbing paint volatilized acidic ingredients, deterioration caused by grease, and this acidic ingredients also promotes the hydrolysis of oils and fats, resulting in increased concentration of acidic components, bearings rust caused by NSK bearing.

Grease the working principle is the use of the oil layer, inner and outer raceway separately, the use of oil viscosity characteristics, dependent on ball and raceway surfaces, separated by a steel ball and raceways of the metal interface, reducing the metal surface wear and corrosion protection of metals from air and water, reducing vibration and noise, so that NSK bearing to Chang Shun rotation.

But the grease deterioration, the viscosity will change, oil film breaking through, grease and adhesion characteristics of functional separation will disappear, so that the consequences.NSK bearing

One is making insulating paint produced by acidic component of the direct oxidation of the metal surface, causing bearings rust.

The two is caused by inner and outer raceway direct touch, rotation occurs when wear, which led to increased noise.