Causes and Treatment Methods of White Spots on Aluminum Plates

Aluminum is a popular material used for a variety of applications, including building facades, automotive parts, and beverage cans, among others. While it is known for its durability and resistance to corrosion, aluminum plates can develop white spots over time.

White spots on aluminum plates can be caused by a variety of factors. One of the most common causes is corrosion. Corrosion can occur when aluminum is exposed to moisture and oxidizing agents, such as salt or acid. This can cause the formation of white spots on the surface of the aluminum plate.

Another cause of white spots is contamination. Contamination from other metals or chemicals can cause white spots to appear on aluminum plates. This can occur during the manufacturing process or during use. For instance, if aluminum plates come into contact with steel, iron or copper, white spots can develop.

Improper cleaning is also a common cause of white spots on aluminum plates. Using abrasive cleaners or tools can lead to the formation of white spots. Abrasive cleaners can cause scratches on the surface of the aluminum plate, which can then trap moisture or other contaminants, leading to the formation of white spots.

To treat white spots on aluminum plates, various methods can be used depending on the cause. For white spots caused by contamination or improper cleaning, proper cleaning with a non-abrasive cleaner can help remove the spots. The use of a mild soap and water solution is recommended. In addition, a soft-bristled brush can be used to gently scrub the surface of the aluminum plate.

For white spots caused by corrosion, polishing the surface of the aluminum plate can help remove the spots. Polishing can be done using a specialized aluminum polish or by using a mixture of baking soda and water. A soft cloth should be used to apply the polish to the surface of the aluminum plate, and then buffed to a shine.

Anodizing the aluminum plate is another method that can be used to prevent the formation of white spots in the future. Anodizing is an electrochemical process that creates a protective layer on the surface of the aluminum plate, making it more resistant to corrosion and other types of damage.

It is important to properly maintain and care for aluminum plates to prevent the formation of white spots. This includes regular cleaning and avoiding the use of abrasive cleaners or tools. It is also important to avoid exposing aluminum plates to moisture and other types of contaminants.

If the white spots persist, it may be necessary to seek professional assistance from a metal specialist or manufacturer. They can help identify the cause of the white spots and recommend appropriate treatment methods.

In conclusion, white spots on aluminum plates can be caused by various factors, including corrosion, contamination, and improper cleaning. Proper cleaning, polishing, and anodizing are effective methods for treating and preventing the formation of white spots on aluminum plates. With proper care and maintenance, aluminum plates can continue to look great and perform well for many years.