Corrosion resistance of 0Cr18Ni12Mo2Ti steel
0Cr18Ni12Mo2Ti steel, also known as 316Ti steel, is a kind of stainless steel. 316Ti steel is mainly composed of 18% chromium, 12% Ni, 2% molybdenum, and 0.08% titanium, with a small amount of nitrogen, phosphorus and sulfur. It is a kind of stainless steel which is widely used, especially in the manufacture of medical, chemical and electrical apparatuses as well as equipment in industrial production process.
316Ti steel has excellent corrosion resistance compared to other stainless steels. It has high resistance to pitting and crevice corrosion in the presence of chloride ions. The addition of titanium to the material produces a strong and harmless passive film on the surface of the material, which can resist the corrosion of organic acids, inorganic acids, bases, salts and its compounds. Low-temperature oxidation resistance of 316Ti steel is also very good, even in harsh environments, 316Ti steel can still maintain its common corrosion resistance.
Heat treatment can also improve its resistance to corrosion. First of all, the stability of the passive film on the surface can be improved by increasing the chromium and nitride content in the material. Secondly, high-temperature oxidation resistance can be improved by increasing the content of chromium and molybdenum. Finally, the consistency and continuity of the passive film can be improved by adjusting the factors such as the content of nickel and molybdenum, and the grain size of the steel. In addition, the passivation and cathodic protection are two of the most effective methods of corrosion prevention in stainless steel.
In order to maintain the corrosion resistance of 0Cr18Ni12Mo2Ti steel, some appropriate preventive measures should be taken. It is necessary to maintain good airtightness of the components to reduce the penetration of corrosive media into the components. The material surface should be kept clean, and lubricants and preservatives should be added to extend the service life. At the same time, in order to ensure the chemical stability of components, it is necessary to enhance overall chemical stability, especially for 308L steel and its derivatives which are easily corroded.
In conclusion, 0Cr18Ni12Mo2Ti steel is a kind of stainless steel with excellent corrosion resistance, which has broad application in many fields. However, in order to maintain its corrosion resistance, appropriate preventive measures should be taken to protect it from corrosion.
