There are three types of corrosion and wear of mechanical seals-

Three types of corrosion and wear of mechanical seals

　2017-06-08　　

261 There are three types of corrosion and wear of mechanical seals:

1. Oxidation wear: The chemical reaction of mechanical seal in the wear process is a form of wear in which oxidation or oxidation reaction dominates.

2. Corrosion and wear of special media: The friction pair acts on special media such as alkali, acid, salt, etc., and its wear mechanism is similar to oxidative wear. Wear particles are formed by the compound of metal and surrounding media along the sliding direction on the friction surface. Fine wear marks.

3. Cavitaion erosion: This is a kind of wear caused by cavitation in the liquid. When the parts are in contact with the liquid and do not move relative to each other, the local pressure where the liquid contacts the part is lower than the saturated vapor pressure of the liquid, and bubbles will be formed. At the same time, dissolved gases may precipitate out to form bubbles. If these bubbles flow to the high-pressure area, and the local pressure at the contact point between the liquid and the part is higher than the bubble pressure, the bubble will collapse, and a great impact and high temperature will be generated at this moment. This repeated process of bubble formation and collapse causes the material on the surface of the material to fall off, forming pit-like and bubble-like sponge-like wear marks, which is called cavitation erosion.　　398.html,

Corrosion and wear of mechanical seal 　　 Cavitation erosion phenomenon of corrosion and wear of mechanical seal