What Causes White Spots on the Surface of an Aluminum Engine?

[AdrielAnn]

The causes and treatment methods for white spots on the surface of an aluminum engine are as follows: 1. Washing contamination: Inadequate washing should be addressed by improving the washing process. If the water used for washing is too dirty, it can contaminate the film; in this case, the water should be replaced to ensure washing quality. 2. Air pollution: The oxide film may be contaminated by smoke, dust, acid, or alkali mist in the air. Enhancing washing, timely dyeing, and prompt transfer can significantly reduce this issue. 3. Oil contamination: The oxide film may be contaminated by oil or sweat. It is essential to strengthen protection and avoid touching the surface of the workpiece with bare hands. 4. Impurities: The presence of insoluble impurities or oil contamination in the dye solution can disrupt normal dyeing. In such cases, the dye solution should be filtered or replaced, and the tank liquid should be cleaned regularly. If the dye solution is contaminated, leading to pitting corrosion on the dyed workpiece, the dye must be replaced. Care should be taken to avoid introducing impurity ions during operation.