Proper preparation of a titanium electrode is critical for preserving its active catalytic layer. Before operation, you must meticulously inspect the coating for defects, gently clean the surface with deionized water or alcohol to remove contaminants, and strictly adjust the electrode spacing (typically 5–20mm) to ensure safe, efficient electrolysis.
The operational lifespan of a titanium electrode is dictated by the integrity of its surface coating. All pre-operational steps must prioritize preserving this delicate layer, as physical damage prior to use will lead to rapid failure once current is applied.
1. Visual Inspection of the Coating
Verifying Surface Integrity
Before doing anything else, inspect the titanium plate’s surface coating for completeness. This is the most critical step to prevent premature failure.
Look closely for any signs of peeling, scratching, bubbling, or discoloration. If the coating is compromised, the electrode will not function correctly and may suffer from accelerated corrosion.
Checking Mechanical Components
Ensure that the electrode holder and conductive sheets are in good condition.
Verify that clip heads open and close properly and that all fastening components, such as screws, are secure. A loose mechanical connection can lead to unstable current distribution.
2. Cleaning and Handling Protocols
Selecting the Right Cleaning Agents
You must remove any oil, grease, or dust accumulated during shipping or storage.
Clean the coating surface using only deionized water or alcohol. These solvents effectively remove surface impurities without reacting with the catalytic material.
Handling Precautions
Do not touch the sample surface directly with your hands. Skin oils can contaminate the active surface and interfere with the electrochemical reaction.
Ensure that the conductive sheet of the electrode holder is clean and free of grease. If dirty, rinse the conductive sheet with deionized water before making contact.
3. Installation and Setup
Optimizing Electrode Spacing
Adjust the distance between electrodes to fit the specific dimensions of your electrolytic cell.
The typical spacing range is 5 to 20mm, though this depends on your specific process requirements. Correct spacing is vital for maintaining voltage efficiency and preventing overheating.
Vertical Alignment
Ensure the electrode hangs strictly vertically within the cell.
Misalignment can cause the electrode to touch the cell body or other internal components. This contact will result in a short circuit, potentially damaging the power supply or the electrode itself.
Understanding the Trade-offs
The Danger of Abrasive Cleaning
Never use steel wool or hard tools to clean the electrode.
While mechanical abrasion might seem faster for removing stubborn dirt, it will scratch the coating. Once the coating is scratched, the underlying titanium substrate is exposed to the electrolyte, leading to rapid passivation and electrode failure.
Connection Security vs. Overtightening
While connections must be secure, ensure the conductive contact points are clean rather than just tightened with excessive force.
Dirty contacts increase resistance even if tight. Prioritize cleaning the conductive sheet over force to ensure efficient current transfer.
Making the Right Choice for Your Goal
- If your primary focus is Equipment Longevity: Prioritize the visual inspection step to ensure no pre-existing coating damage (peeling or bubbling) exists before applying power.
- If your primary focus is Process Efficiency: Focus heavily on the 5-20mm spacing and vertical alignment to minimize resistance and prevent short-circuiting.
A disciplined pre-check routine is the single most effective way to extend the service life of your titanium electrodes.
Summary Table:
| Step | Action Required | Key Specification/Tool |
|---|---|---|
| Visual Inspection | Check for peeling, scratches, or bubbles | No damage to coating surface |
| Cleaning | Remove oil, grease, and dust | Deionized water or alcohol |
| Electrode Spacing | Adjust distance between electrodes | 5mm to 20mm range |
| Alignment | Position electrode vertically | Avoid contact with cell body |
| Mechanical Check | Secure holders and conductive sheets | Clean, grease-free contacts |
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