During the processing and use of titanium alloy standard parts, surface oil contamination is a significant concern. It not only affects the appearance but may also impair functionality. Regular cleaning and degreasing of titanium fasteners are therefore essential. The smooth surface finish typically applied during manufacturing facilitates subsequent cleaning. Below we detail methods for removing oil from titanium standard parts.
1. Brush Degreasing Method
Brush degreasing offers a simple solution for large workpieces or localized treatment. Operators can apply cleaning agents such as lime slurry, magnesium oxide, cement, soap solution, or tile ash using brushes or cloths, scrubbing the workpiece surface repeatedly. Specialized metal cleaners may also be used. For stubborn residues, reapplication of degreaser followed by additional brushing is recommended. Multiple treatments typically achieve complete oil removal.
2. Tumbling Degreasing Method
This method suits small, simple-shaped components like titanium alloy fasteners. Place parts together with sawdust, soap pods, and weak alkaline solution in a sealed drum for cleaning. When introducing ultrasound during this process, unique physical phenomena occur: instantaneous pressure changes cause bubble implosion, generating shock waves that dislodge surface oil. Caution: Bubble collapse generates extreme temperatures (thousands of degrees) and pressures (tens of thousands kPa), requiring strict safety protocols.
3. Ultrasonic Degreasing Method
Ultrasound significantly enhances efficiency in solvent, electrolytic, and chemical degreasing as well as acid pickling. Limitations exist due to linear wave propagation - obscured areas may receive inadequate coverage. Rotate or reposition workpieces in the tank during ultrasonic processing to ensure uniform cleaning.
Critical considerations for ultrasonic degreasing:
Mesh selection: Fine meshes attenuate ultrasound intensity excessively, while coarse meshes may allow small parts to escape. Bottom-emission configurations (where ultrasound penetrates the tank floor) are recommended.
Temperature control: Excessive temperatures generate bubbles that impede ultrasonic transmission.
Solution management: Ultrasonic vibration causes suspended particles to aggregate. While beneficial for degreasing, this may cause redeposition of contaminants. Implement continuous filtration with oil-absorbing media to prevent this issue.
Concentration optimization: High degreasing solution concentrations hinder ultrasonic propagation. Determine optimal concentration ratios through experimentation.
Mastering these degreasing techniques ensures proper maintenance of titanium alloy standard parts, preserving their performance and extending service life.
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