The causes and preventive measures of stainless steel pipe rusting

The causes and preventive measures of stainless steel pipe rusting

Simply put, stainless steel is steel that is not easy to rust. In fact, some stainless steels have both rust resistance and acid resistance (corrosion resistance). The rust resistance and corrosion resistance of stainless steel are due to the formation of a chromium rich oxide film (passivation film) on its surface, which isolates the metal from the external medium, prevents further corrosion of the metal, and has the ability to self repair. If damaged, the chromium in the steel will regenerate a passivation film with the oxygen in the medium, continuing to provide protection.

Why does stainless steel rust?

In daily life, we sometimes find that the stainless steel of some facilities such as flagpoles, bus shelters, and lightboxes on the street has obvious rust and acid washing phenomenon. Since it is stainless steel passivation, why does it still rust? There are two reasons for these situations, one is the low chromium content in the material, which belongs to low-quality stainless steel. The second is that it is not stainless steel at all, but rather using electroplating to deceive users. It is understood that many decorative materials nowadays use this electroplating process to treat their appearance. As the material is ordinary steel, when the electroplating layer peels off, it will naturally rust.

Suggestions for stainless steel rusting

1. It is necessary to regularly clean and scrub the surface of decorative stainless steel to remove attachments and eliminate external factors that may cause modification.

2. In coastal areas, 316 stainless steel should be used, which can resist seawater corrosion.

3. Some stainless steel pipes in the market do not meet the corresponding national standards for chemical composition and cannot meet the requirements of 304 material. Therefore, it can also cause rusting.

Since its establishment, Shandong Kungang Metal Technology Co., Ltd. has accumulated advanced technical experience, continuously innovated independently, and strived to provide personalized customization and systematic solutions for users, creating high-quality and reliable stainless steel pipeline products. The company mainly deals with stainless steel pipes, seamless steel pipes, steel sheet piles, PE pipes, galvanized pipes, and petroleum casings, especially in the field of precision pipes. The product quality is stable and reliable, and has been highly praised by users! Thinking about cutting-edge technology, creating a brand enterprise, but not giving up. Welcome new and old customers to call and discuss cooperation!