The surface cleanliness of stainless steel pipeline systems plays a crucial role in ensuring the safe production of food and pharmaceuticals. A good surface finish helps reduce microbial growth and exhibits corrosion resistance. To enhance the surface quality of 316 stainless steel hygienic pipes, improving surface morphology and structure, and reducing the number of interfaces, common surface treatment methods include the following：
1. Acid Pickling, Polishing, and Passivation: The pipes undergo acid pickling, polishing, and passivation, which does not increase surface roughness but removes residual particles on the surface, reducing energy levels. It does not, however, reduce the number of interfaces. A passivation protective layer of chromium oxide forms on the stainless steel surface, protecting it from corrosion.
2. Mechanical Grinding and Polishing: Precision grinding is employed to improve surface roughness, enhancing surface structure. However, it does not improve the morphological structure, energy levels, or reduce the number of interfaces.
3. Electrolytic Polishing: Electrolytic polishing significantly improves surface morphology and structure, reducing the actual surface area to a large extent. The surface forms a closed chromium oxide film, with energy levels approaching the normal levels of the alloy. Simultaneously, the number of interfaces is minimized.
Post time: Dec-22-2023