It can be bothersome for aluminum parts to turn black after ultrasonic cleaning, but fortunately, this problem can usually be solved. Before solving the problem, we need to understand the reasons that may cause the aluminum parts to turn black.
Improper cleaning agent: The use of cleaning agents that are not suitable for aluminum, or the detergents are expired or contaminated, may cause the aluminum surface to react and produce black substances.
Improper setting of cleaning parameters: Excessive temperature, time and power settings during cleaning may cause oxidation or blackening of the aluminum surface.
Oxidation reactions: Aluminum oxidizes with oxygen in the air to form an oxide layer, giving the aluminum surface a black color.
The key to solving the problem of blackening of aluminum parts after ultrasonic cleaning is to take effective measures to deal with the underlying causes. Here are some solutions:
1.Check to replace the cleaning agent
Make sure the cleaning agent you use is suitable for aluminium and is within the expiration date. Choose a cleaning agent that is compatible with aluminum to avoid adverse reactions.
2.Adjust the cleaning parameters
Check the ultrasonic cleaner's parameter settings, including temperature, time, and power. Reduce the cleaning temperature or shorten the cleaning time appropriately to prevent excessive oxidation and blackening.
3.Surface treatment
For aluminum parts that have turned black, the following surface treatment methods can be used:
Alkaline and Acidic Oxidation: These methods can be used to remove oxide layers and dark spots from the surface.
Scrub paper and polishing: You can gently wipe or polish with sandpaper to remove the blackened parts and restore the shine to the surface.