What is the role of surface treatment of sintered filter element- Ningbo Jiangbei District Cicheng Pneumatic Components Factory.

The surface treatment technology of sintered filter elements plays a vital role in improving their performance, especially in terms of corrosion resistance, filtration accuracy, mechanical properties and fluid dynamic characteristics.

First, the surface treatment of sintered filter elements significantly improves their corrosion resistance. In many industrial applications, filter elements usually need to be in contact with corrosive media such as strong acids and alkalis for a long time. Through specific chemical plating treatments, such as plating nickel-phosphorus alloy on the surface of stainless steel sintered filter elements, a dense protective film can be formed. This coating effectively blocks the direct contact between the corrosive medium and the base metal, and at the same time, through the sacrificial anode protection mechanism, the plated metal is preferentially consumed, thereby extending the service life of the filter element. In the catalyst recovery link of the chemical industry, the surface-treated sintered filter element can operate stably for several years in harsh corrosive environments, which greatly reduces the equipment maintenance cost and the risk of production interruption.

Secondly, surface treatment contributes significantly to the improvement of the filtration accuracy of sintered filter elements. When the aluminum-based sintered filter element is treated with micro-arc oxidation technology, the ceramic oxide film generated on the surface of the filter element forms a nano-scale pore structure. This special pore structure can not only effectively intercept tiny particles, but also precisely control the size and distribution of pores by adjusting the oxidation process parameters, so that the filtration accuracy can reach the submicron level. In the preparation of ultrapure water in the electronics industry, sintered filter elements treated with micro-arc oxidation can efficiently remove tiny ions and colloidal particles in water, provide ultrapure water that meets strict standards for precision processes such as chip manufacturing, and ensure the stability of product quality.

In addition, surface treatment technology also enhances the mechanical properties of sintered filter elements. Laser surface strengthening technology uses a high-energy-density laser beam to quickly heat and cool the surface of the filter element, prompting the surface to form a fine grain structure and residual compressive stress. This treatment method significantly improves the hardness and wear resistance of the filter element surface, enabling it to withstand higher pressures and more frequent backwashing operations. In high-pressure backwashing oil filters, the surface wear of laser-surface-strengthened sintered filter elements is greatly reduced during long-term use, maintaining stable filtration performance and a long service life.

From a fluid dynamics perspective, surface treatment can also optimize the fluid permeability of sintered filter elements. By constructing a specific micro-nano structure on the surface of the filter element, such as the super-hydrophobic structure of the bionic lotus leaf surface, the friction resistance between the fluid and the filter element surface can be reduced, thereby reducing the pressure loss of the fluid during the filtration process. This super-hydrophobic surface treatment not only improves the filtration efficiency, but also reduces energy consumption, which is in line with the trend of green industrial development. In the membrane bioreactor of the water treatment industry, the sintered filter element with super-hydrophobic surface treatment can increase the sewage flux by more than 20% and reduce the frequency of membrane fouling.