What is the role of the surface treatment process of stainless steel extension springs

The surface treatment process of stainless steel tension springs is an important part of improving their performance and extending their service life. By forming a protective film on the surface of the spring, its corrosion resistance, wear resistance and fatigue resistance can be effectively enhanced, while improving the appearance quality. The formation of this protective film not only prevents oxygen, moisture and other corrosive media from directly contacting the spring matrix, but also significantly reduces the corrosion rate, thereby extending the service life of the spring.

Among the many surface treatment processes, passivation treatment is widely used and its effect is remarkable. Passivation treatment forms a dense oxide film on the surface of stainless steel tension springs by chemical or electrochemical means. The film has excellent corrosion resistance, especially in harsh environments such as high temperature, high humidity and strong acid and alkali, it can still maintain stable performance. In addition, passivation treatment improves the glossiness of the spring surface, thereby enhancing the overall aesthetics of the product.

Polishing treatment is also an important process to improve the surface quality of stainless steel tension springs. This process removes tiny surface defects and roughness by physical or chemical methods, so that the spring surface reaches a mirror finish. This not only improves the appearance of the product, but also effectively reduces friction noise and vibration during use, and enhances the comfort and reliability of use. At the same time, polishing treatment improves the surface hardness and wear resistance of the spring to a certain extent, further extending its service life.

For stainless steel tension springs in specific application environments, such as springs in medical equipment, more special surface treatment processes such as electroplating or spraying are usually required. The electroplating process forms a metal coating (such as chromium, nickel, zinc, etc.) on the surface of the spring, which significantly improves its corrosion resistance and wear resistance. The spraying process forms an organic coating (such as epoxy resin, polyurethane, etc.) on the surface of the spring, which enhances its chemical corrosion resistance and anti-aging properties. These special surface treatments can not only meet the needs of specific environments, but also improve the overall quality and reliability of the product.

In addition, a variety of surface treatment processes such as sandblasting, chemical oxidation coloring and electrochemical oxidation coloring have also been used in the processing of stainless steel tension springs. Sandblasting can effectively remove dirt and oxide layers on the surface of the spring, increase surface roughness, and thus improve adhesion with other materials. Chemical oxidation coloring and electrochemical oxidation coloring form a colored oxide film on the surface of the spring, which not only beautifies the appearance of the product, but also enhances its corrosion resistance and wear resistance to a certain extent.