The daily maintenance of aluminum cam lock couplings mainly focuses on cleaning and functional inspection, and does not require regular polishing. The specific maintenance points are as follows:

1. No need for polishing in daily life
Aluminum material characteristics: The naturally formed dense oxide layer (Al ₂ O3) on the surface of aluminum can effectively prevent corrosion. Polishing will damage this protective layer and accelerate oxidation.
Sealing relies on gaskets: The sealing performance of cam lock couplings is mainly achieved by pressing the gasket (such as nitrile rubber, fluororubber, etc.) with the male and female couplings, regardless of the surface smoothness of the aluminum parts.
Applicability in industrial scenarios: Aluminum couplings are commonly used in environments such as chemical engineering and oil tanker transportation. Slight surface oxidation does not affect functionality, and frequent polishing increases maintenance costs.

2. Alternative maintenance measures
Cleaning and stain removal: Use neutral cleaning agents (such as soapy water) to rinse the surface of oil stains and chemical residues, avoid using strong acids (such as sulfuric acid, phosphoric acid) or strong bases, and prevent corrosion of aluminum materials.
Check the seals: Regularly inspect the gaskets for aging, deformation, or cracking, and replace them in a timely manner (such as nitrile rubber gaskets, which have a lifespan of about 1-2 years).
Lubrication of moving parts: A small amount of food grade grease (such as lithium grease) can be applied to the camshaft handle shaft to ensure smooth opening and closing.

3. Special polishing scenarios
When severely corroded: If there are large areas of corrosion pits or oxide layer peeling off on the aluminum surface, it is necessary to first mechanically polish (such as 400 # sandpaper), then chemically polish (phosphoric acid+sulfuric acid mixture), and finally passivate to rebuild the oxide layer.
After seal failure: When the dense cover surface deforms due to collision, professional polishing is required to restore flatness (surface roughness Ra ≤ 0.8 μ m), but not for daily operation.

4. Maintain taboos
Prohibited PTFE gaskets: These gaskets cannot form an effective seal with aluminum parts and may cause leakage.
Avoid contact with compressed gas: The cam lock design is not suitable for compressed air or steam, as high-pressure gas may flush the coupling.
Anti metal contact corrosion: Aluminum couplings should not be directly connected to dissimilar metals such as copper and iron to avoid electrochemical corrosion.