In order to study the influence of metal antiwear self-repairing additive composed of magnesium silicate hydroxide on the antiwear performance of lubricating oil,the wear experiments were carried out on a four-ball machine to evaluate the antiwear and friction reducing property of the metal antiwear self-repairing additive by adding it in the CD40 engine oil.

A comparison was made between SJ10W–40 lubrication oil with and without magnesium silicate hydroxide.

The hydroxyl silicate was surface-modified and dispersed in water, and mixed with water-soluble lubricant by different proportion.

By the instance of hydroxyl silicate mineral powder additives application on motor,the gas escape amount of bent axle box was measured,and based on the decrease feature of gas escape amount,it demonstrates that hydroxyl silicate mineral powder additive possesses self-repairing performance,and proves that the method of examination in-situ is valid.

An MM-200 friction and wear tester was performed to evaluate the friction and wear behavior of 1045 steel/ductile cast iron pair under the lubrication of 650SN oil and the 650SN containing hydroxyl silicate particulates as the additive (The latter oil specimen was coded as KF-1).

Dissolution behavior of magnesium silicate in NaOH sub-molten salt system

Two magnesium silicates containing hydroxyl groups,serpentine and talc,were added into commercial Vaseline to observe their anti-wear and extreme-pressure property using four ball testing machine.

It is investigated the anti-wear & self-repair property of magnesium silicate and talc powder in vaseline by four-ball tester,and explored the anti-wear & self-repair mechanism,it is considered that anti-wear & self-repair mechanism of magnesium silicate and talc powder is coupling of ball bearing view and adsorption,penetration as well as friction action view.