Similarities and Differences in Surface Treatment for Corrosion-Resistant Axial Fans

Similarities and Differences in Surface Treatment for Corrosion-Resistant Axial Fans

After the overall assembly and commissioning of corrosion-resistant axial fans are completed, surface treatment is required to finalize the manufacturing process. Corrosion-resistant axial fans typically undergo two processes: surface cleaning and anti-corrosion treatment. While the surface treatment processes for these fans are similar, there are significant differences depending on the product characteristics. The following is a detailed explanation: 1. Similarities First, the surface cleaning process is the same, but it generally involves removing weld spatter and smoothing the surface through grinding. Typically, some corrosion-resistant axial fans made of stainless steel must undergo polishing for aesthetic reasons. The welded joints are the primary focus of this treatment. Regardless of the welding method used, these joints will inevitably have uneven surfaces, so they must be ground down using an angle grinder. Second, the spraying process is the same for some corrosion-resistant axial fans and standard axial fans. Generally, both types can be coated with anti-corrosion paint. These are spray-applied coatings that are inexpensive, have a simple structure, and cure quickly. However, due to the strict enforcement of environmental protection laws and regulations in China, they have been replaced with water-based coatings. These coatings are relatively more expensive, difficult to apply at low temperatures, and cure more slowly. Consequently, the manufacturing process becomes more rigorous. Second, Differences First, the operating temperatures of anti-corrosion axial fans can be categorized as ambient or high-temperature, which dictates the choice of coating. At ambient temperatures, natural wind powder and autumn fragrance powder use the same type of coating, whereas high-temperature induced draft fans require heat-resistant coatings—typically heat-resistant water-based coatings. This coating ensures that the anti-corrosion surface coating of the fan will not degrade, discolor, or peel due to high temperatures, thereby maintaining its corrosion-resistant properties and preserving the product’s appearance. Second, the application process differs. Due to their large size and weight, anti-corrosion axial fans typically undergo a spray coating process. For smaller, more regularly shaped fans, either a spray coating or baking process is used to achieve a more aesthetically pleasing finish.