Causes of Rust Damage in NSK Bearings

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Proper maintenance is crucial to prevent rust and damage in NSK bearings. Here are some key steps to ensure the longevity of your bearings: 1. **Cleaning the Surface**: Before applying any anti-rust treatment, it's important to clean the bearing thoroughly. Remove any existing rust preventive materials and check the conditions. Common cleaning methods include using solvents, chemical treatments, or mechanical cleaning. 2. **Drying the Surface**: After cleaning, the bearing must be completely dry. You can use filtered dry compressed air, a drier at 120–170°C, or clean gauze to dry the surface effectively. **Applying Anti-Rust Oil** - **Soaking Method**: For small components, soaking them in anti-rust grease is effective. This allows a thin layer of grease to adhere to the surface, which can be controlled by adjusting the temperature or viscosity of the grease. - **Brushing Method**: This method is ideal for large or irregularly shaped bearings that cannot be soaked. When brushing, avoid over-application and ensure even coverage to prevent leakage. - **Spraying Method**: For large-scale applications, spraying with compressed air at about 0.77 MPa is common. This works best with solvent-diluted or thin-layer anti-rust oils, but safety precautions must be followed to avoid fire hazards. **Factors Affecting Metal Corrosion** Metal corrosion is influenced by both internal and external factors, including: 1. The chemical composition and structure of the metal itself 2. Surface smoothness (oxygen concentration differences can cause galvanic corrosion) 3. The type and pH of the solution in contact with the metal 4. Environmental temperature and humidity 5. Exposure to various environmental media such as chemicals or moisture **Why Do Sweat and Skin Contact Cause Corrosion?** Human sweat is a slightly acidic, colorless liquid containing salts like sodium and potassium, along with organic acids like lactic acid and citric acid. When it comes into contact with metal, it forms a thin film that can lead to electrochemical reactions, causing corrosion over time. **Common Causes of Bearing Damage** 1. **Improper Equipment Use (About 16%)** - Using brute force when handling bearings can cause deformation. - Incorrect installation or misalignment may result in excessive stress on the bearing. *Expert Tip:* Always use appropriate tools and test equipment with precision instruments. 2. **Poor Lubrication (About 50%)** - Lack of lubricant or improper application is a major cause of early failure. - Choosing the wrong lubricant or incorrect filling method can also reduce performance. *Expert Tip:* Select the right lubricant and follow proper application techniques. 3. **Contamination (About 14%)** - Dust, metal shavings, or other foreign particles entering the bearing can cause damage. - Poor storage practices or unsanitary environments increase the risk of contamination. *Expert Tip:* Keep bearings sealed until use and maintain a clean working environment. 4. **Fatigue Damage (About 34%)** - Overloading, lack of maintenance, or aging equipment can lead to fatigue failure. *Expert Tip:* Choose the correct bearing type and replace worn-out bearings promptly.

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Related Bearing Knowledge - Domestic "Green Revolution" Oscillation Screen Bearing Analysis - Application Methods of SKF Bearings - Introduction to SKF Double Row Deep Groove Ball Bearings This article is linked from http:// Please reference China Bearing Network: http:// Previous: Bearing Life Extension Techniques Next Edit: INA Imported Bearings Need Replacement

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