Even if the surface of ordinary stainless steel pipe fittings has a certain degree of corrosion resistance, it may still absorb pollutants, breed bacteria or produce chemical reactions due to microscopic defects. Through reasonable surface treatment processes, the surface structure of pipe fittings can be optimized, its anti-fouling performance can be enhanced, the safety and cleanliness of fluid transportation can be guaranteed, and the strict industry application requirements can be met.
Mechanical polishing is the basic process to improve the anti-pollution ability of double clamp stainless steel pipe fittings. By using polishing wheels, sandpaper and other tools to polish the surface of pipe fittings, the surface roughness can be significantly reduced. When the surface roughness of pipe fittings is reduced from Ra1.6μm to Ra0.4μm or even lower, the microscopic protrusions and depressions on the surface are reduced, and pollutants are difficult to adhere to the surface of pipe fittings. For example, in the food and beverage industry, double clamp stainless steel pipe fittings that have been mechanically polished with high precision can effectively reduce the residue of media such as juice and sauce, and prevent the deterioration of residual substances from causing bacterial growth. At the same time, the smooth surface makes cleaning easier, reduces cleaning dead corners, and further improves the anti-pollution ability of pipe fittings.
Electrochemical polishing further optimizes the surface performance of pipe fittings through electrochemical reactions on the basis of mechanical polishing. Immerse the double clamp stainless steel pipe fittings in a specific electrolyte and apply a DC electric field. The surface of the pipe fittings will undergo anodic dissolution, and the microscopic protrusions will be dissolved first, making the surface smoother. At the same time, a thinner and denser passivation film will be formed on the surface of the pipe fittings. This passivation film is mainly composed of chromium oxide, and its structure is tight, which can effectively prevent corrosive substances such as oxygen atoms and chloride ions from contacting the stainless steel matrix. When transporting corrosive liquids in the chemical industry, the dense passivation film can prevent pollutants from chemically reacting with pipe fittings, reduce the risk of pollution, and extend the service life of pipe fittings.
Passivation treatment is a chemical treatment process specifically for stainless steel surfaces. Immerse the double clamp stainless steel pipe fittings in a solution containing passivators such as nitric acid and citric acid, and remove impurities such as iron ions and free iron on the surface of the pipe fittings through chemical reactions, so as to form a stable passivation film on the surface. This passivation film can not only enhance the corrosion resistance of the pipe fittings, but also reduce the surface active sites and reduce the adsorption capacity of pollutants. In the pharmaceutical industry, passivated double clamp stainless steel pipe fittings can avoid adverse reactions between drug components and the surface of pipe fittings, prevent cross contamination caused by surface adsorption of drug residues, and ensure the safety and purity of drug production.
Coating technology provides additional anti-pollution protection for double clamp stainless steel pipe fittings. For example, Teflon (PTFE) coating is applied to the surface of pipe fittings. Teflon has extremely low surface energy, and liquids such as water and oil are difficult to adhere to its surface, showing good self-cleaning performance. When conveying oily media, the oil will not adhere to the inner wall of the pipe fittings, but will be carried out with the flow of the medium, reducing the risk of pollution caused by oil residues. In addition, there are antibacterial coatings that can be applied to the surface of pipe fittings. By releasing antibacterial components such as silver ions, the growth and reproduction of bacteria on the surface of pipe fittings can be inhibited. In the fields of food processing and drinking water transportation, it effectively ensures the sanitation and safety of the medium and improves the anti-pollution ability of pipe fittings.
In practical applications, a combination of electrolytic polishing and passivation is often used to further enhance the anti-pollution ability of double clamp stainless steel pipe fittings. Electrolytic polishing first micro-flattens the surface of the pipe fittings and forms a preliminary passivation film, and the subsequent passivation treatment strengthens the performance of this passivation film. The combination of the two can not only ensure the smoothness of the pipe fitting surface, but also enhance the stability and density of the passivation film. This combined process greatly improves the anti-pollution ability of the pipe fitting surface. In the ultra-pure water treatment system of the semiconductor industry, it can effectively prevent trace metal ions and particulate pollutants in the water from being adsorbed on the surface of the pipe fittings, ensure the ultra-high purity of the water quality, and meet the strict requirements of semiconductor production for cleanliness.
The surface treatment process of double clamp stainless steel pipe fittings improves its anti-pollution ability from multiple dimensions. Mechanical polishing and electrochemical polishing improve surface roughness, passivation treatment enhances corrosion resistance, coating technology builds a protective barrier, and the combined process achieves synergistic efficiency. Through the application of these processes, the adhesion, adsorption and chemical reaction of pollutants on the surface of pipe fittings are effectively reduced, meeting the requirements of different industries for the cleanliness and safety of pipe fittings. With the continuous improvement of industry standards and continuous technological innovation, more advanced surface treatment processes will be applied to double clamp stainless steel pipe fittings in the future to further enhance their anti-pollution performance and provide strong guarantees for the efficient and safe operation of industrial production.
