During the processing and use of titanium alloy standard parts, surface oil contamination is a significant issue. It not only affects the appearance of the standard parts but can also hinder normal operation. Therefore, regular cleaning and degreasing of titanium standard parts is crucial. Titanium standard parts are typically finished to a smoother surface during processing, which undoubtedly facilitates subsequent cleaning. Below, we will provide a detailed introduction to surface degreasing methods for titanium standard parts.
Brushing Degreasing Method
When the workpiece is large or only requires localized surface treatment, brushing degreasing is a simple and effective method. To do this, use a brush or rag dipped in a detergent such as lime slurry, magnesium oxide, cement, soap solution, or tile ash, and rub it back and forth across the workpiece surface. Alternatively, a specialized metal cleaner can be used to remove oil stains. Sometimes, brushing may not completely remove the oil stains. In this case, brush again with a degreaser. Repeating this process several times will usually completely remove the oil stains.
Drum Degreasing Method
Drum degreasing is suitable for small, simple parts, such as titanium alloy standard parts. Specifically, these small parts are placed in a drum along with sawdust, soap locust, and a weak alkaline solution. The drum is then sealed and cleaned for degreasing. During the cleaning process, emitting ultrasonic waves into the liquid produces a series of interesting physical phenomena. The instantaneous decompression and subsequent compression cause bubbles to burst immediately after creation, dispersing them and generating shock waves. This shock wave removes oil from the workpiece's surface, thereby removing the oil. However, the collapse of these bubbles generates temperatures of thousands of degrees Celsius and pressures of hundreds of thousands of kilopascals, so safety precautions must be taken.
Ultrasonic Degreasing
Ultrasonic waves play a vital role in solvent degreasing, electrolytic degreasing, chemical degreasing, and pickling processes, significantly improving degreasing efficiency. However, ultrasonic waves also have certain limitations. They travel in a straight line and have difficulty reaching obscured areas. Therefore, when using ultrasonic degreasing, the workpiece should be rotated or turned within the drum to ensure thorough cleaning of all areas.
When using a mesh basket for degreasing, the mesh size is crucial. Small mesh openings significantly block the ultrasonic wave, significantly attenuating its intensity; large mesh openings also tend to miss parts. In this case, bottom irradiation is recommended, allowing the ultrasonic wave to penetrate the bottom plate and reach the workpiece. Furthermore, temperature control is crucial. Excessive temperatures can create excessive bubbles, which can hinder ultrasonic propagation.
Furthermore, suspended particles in the solution vibrate under the influence of ultrasonic waves, causing them to aggregate. While this facilitates degreasing, it can also easily cause contaminants to re-adhere to the workpiece surface. Therefore, continuous filtration equipment with oil-absorbing materials is recommended for solution filtration to avoid these issues. Furthermore, excessively high degreasing concentrations can affect ultrasonic propagation and reduce its effectiveness, so the optimal concentration and ratio must be determined through experimentation.
Mastering the above methods for degreasing titanium alloy standard parts will help us better use and maintain titanium standard parts, ensuring their performance and service life.
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