Let me walk you through the surface treatment methods for stainless steel pipe fittings.

　　Let me tell you about stainless steel. Pipe fittings Methods of surface treatment

　　The Important Role of Stainless Steel Pipe Fittings in Daily Life

　　In interior renovation projects, plumbing accounts for only a small share of both material consumption and overall costs; however, any issues with plumbing can have extremely serious consequences. Therefore, it is crucial to select plumbing products that are reliable in quality, highly stable, easy to maintain, and healthy and environmentally friendly.

　　Since the beginning of the 21st century, with the improvement of living standards, more than 30% of Chinese residents have come to require high-end plumbing materials to meet their demand for a high-quality lifestyle. Consequently, premium stainless steel is shifting its application from high-end tableware to household plumbing, and the selection of high-quality thin-walled stainless steel pipes for both commercial and residential projects has become a prevailing trend—thin-walled stainless steel pipes and stainless steel Pipe fittings It will become an indispensable part of the future building materials market.

　　Stainless steel is regarded as a biocompatible, health-friendly material suitable for implantation in the human body. In developed countries, stainless steel has been used to manufacture water pipes for many years. Thanks to its safety, reliability, hygienic properties, environmental friendliness, cost-effectiveness, and versatility, thin-walled stainless steel pipe has gradually emerged as a new choice for plumbing applications, reflecting current global trends and development directions. Stainless steel pipe is rightly hailed as the true “green piping material” of the 21st century.

　　With the development of the national economy and the improvement of living standards, there is growing emphasis on the healthiness of domestic water supplies and environmental protection. The use of high-quality stainless steel pipe fittings for water supply systems has become a global trend. Data show that in Germany, more than 80% of households opt for stainless steel piping; in Japan, over 85% of Tokyo households have adopted stainless steel pipes; in Australia, traditional piping materials have largely been replaced by stainless steel; and in the United States, all plumbing in five-star hotels in Las Vegas is made of stainless steel.

　　What are the surface treatment methods for stainless steel pipe fittings?

　　How can the performance of stainless steel pipe fittings be improved, and what surface treatments should be applied after the fittings are formed?

　　General stainless steel Pipe fittings There are three types of surface treatment:

　　1. Natural surface whitening treatment: The processed surface often develops black scale. Previously, the conventional method involved using nitric acid and hydrofluoric acid for aggressive etching to remove the surface layer. However, this approach is environmentally polluting, hazardous to human health, costly, and highly corrosive, and has therefore been phased out.

　　Currently, the most common methods for removing scale are:

　　(1) Chemical method: Immerse and clean the stainless steel surface using a non-polluting acid pickling and passivation paste and a room-temperature, non-toxic cleaning solution containing organic additives, achieving a natural whitening treatment. After treatment, the surface exhibits virtually no luster.

　　(2) Sandblasting: The surface black oxide scale is removed by spraying fine glass beads.

　　2. Flange surface polishing: Depending on the specific application requirements, surface gloss can be achieved through methods such as chemical polishing, electrochemical polishing, and mechanical polishing.

　　3. Surface Coloring Techniques: Coloring stainless steel not only enhances the aesthetic appeal of stainless steel products but also improves their wear resistance and corrosion resistance.

　　(1) Chemical oxidation method.

　　(2) Electrochemical oxidation coloring method.

　　(3) Ion-deposition oxide coloring method.

　　(4) High-temperature oxidation coloring method.

　　(5) Gas-phase pyrolysis coloring method.

　　That’s all for today’s segment. Thank you for watching, and see you next time!