Papermaking machinery and equipment include: material preparation equipment, pulping equipment, pulp washing equipment, screening equipment, purification equipment, bleaching equipment, storage equipment, paper processing equipment, etc. This kind of mechanical equipment is mainly used in the harsh environment with prominent corrosion problems and is not convenient for short-term maintenance. Therefore, the environment has high requirements on the corrosion resistance of the equipment, and the bearing and lubrication system should have good corrosion resistance.