ball bearing

With the development and utilization of global Marine resources, the demand for Marine engineering equipment is increasing day by day. Bearing as the core parts of mechanical equipment, its performance and quality are crucial to the operation of the entire equipment. Corrosion is a common problem in the Marine environment, so bearings used in Marine engineering must deal with the ever-present risk of corrosion. Due to the corrosive force of seawater, the selection of bearings must balance load capacity and corrosion resistance to extend the service life of bearings.

First, the choice of corrosion-resistant bearing materials

Corrosion resistant bearing materials must have a high degree of corrosion resistance and wear resistance in order to be used for a long time in salt spray, seawater and other corrosive media. Commonly used corrosion resistant bearing materials include stainless steel, ceramics and plastics. Among them, stainless steel materials have good corrosion resistance and wear resistance, and are commonly used in Marine engineering equipment bearing materials.

2. Bearing type suitable for Marine environment

1.440 stainless steel bearings

440 stainless steel is a high carbon, high chromium martensitic stainless steel, has a certain resistance to seawater or salt spray, has good corrosion resistance and wear resistance, suitable for corrosion and wear in the Marine environment. By passivation treatment, its corrosion resistance can also be improved.

2.316 Stainless steel bearing

316 stainless steel is a low carbon, high chromium, nickel stainless steel material with good corrosion resistance and wear resistance, suitable for corrosion and wear in the Marine environment. Compared with 440 stainless steel, 316 stainless steel is cheaper, so it is widely used in Marine engineering equipment.

3. Full ceramic bearing

All-ceramic bearings are made of zirconia or silicon nitride materials with high corrosion resistance, high hardness and high wear resistance, suitable for corrosion and wear in Marine environments. However, the price of full ceramic bearings is high and relatively brittle, so care needs to be taken to avoid impact during use. In environments where heavy impact loads must be borne, the use of all-ceramic bearings is not recommended.