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Cleaning solution of ultrasonic cleaner for anodized aluminum

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Anodized aluminum can improve wear resistance and corrosion resistance, and can increase decorative color. The authoritative literature on this process emphasizes the importance of cleaning the surface of objects before anodizing aluminum. This is because a clean, residue free surface is critical to obtaining a flawless coating. Now, if we install an ultrasonic cleaner on the production line, we can eliminate surface contaminants, such as metal fines and lubricants that may be deposited when manufacturing parts.

Ultrasonic cleaning agents

Ultrasonic cleaning agents

Cleaning solution of ultrasonic cleaning machine for anodized aluminum: In addition to the size of the cleaning tank, an important consideration is to use appropriate ultrasonic frequency. Lower frequencies (such as 25kHz) will produce relatively large cavitation bubbles. When bubbles burst, higher frequencies (such as 37, 80 or 130 kHz) will produce greater cleaning effect. Higher frequency cavitation bubbles are also more suitable for parts with highly polished or complex surfaces.

 

Establish a power adjustable 37/80kHz for pre anodizing cleaning parameters. It can be set to automatically switch frequencies at 30 second intervals.

Installation work

Installation work

In addition to the operating frequency, the equipment selection criteria should also include a continuous scanning mode that provides a uniform sound energy distribution throughout the bath. This can avoid “hot spots” with strong energy, and may damage highly polished surfaces and “blind areas” with little or no cavitation. The degassing function shortens the time for removing the residual air in the newly prepared solution. The timer allows the operator to set the cleaning time so that they can handle other matters. Most ultrasonic cleaners can also set the recommended cleaning fluid temperature.

 

In this case, it is important that the solution used before anodizing should be a residue free flushing solution. It can remove water-cooled lotion, grease and grease, fingerprints and dust deposited during mechanical treatment of aluminum and light metal alloys (but test magnesium alloys before use). The recommended dilution in water is about 2% by volume.

 

Cleaning steps before anodizing for Granbosonic ultrasonic cleaning machine

Although the operating manual of the cleaner contains instructions, the basic steps are:

 

1. Prepare cleaning solution. Add water to the water tank of the ultrasonic cleaner, and add an appropriate amount of concentrated cleaning solution. Turn on ultrasonic and degassing modes (if equipped) to mix and degas solutions.

 

2. Place the parts in the cleaning basket and immerse them in the solution. Larger parts may be suspended in the solution, but keep them away from the sides and bottom of the tank.

Ultrasonic Cleaner Basket

Ultrasonic Cleaner Basket

3. At the end of the cycle, take out and wash the parts. Washing with deionized or distilled water helps to avoid water stains.

 

4. Dry the parts before anodizing.

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