Nickel Alloy Resistant to Crevice Corrosion and Phosphoric Acid Corrosion
Introduction
Nickel alloy is a type of alloy material composed of nickel as the base element, chromium and various other alloying elements. It has excellent properties such as heat resistance, corrosion resistance and high strength. Nickel alloy has been widely used in many industries due to its excellent performance, such as aerospace industry, chemical industry, shipbuilding industry and nuclear industry, etc. This article will discuss the Ni-Cr-Mo alloy - a type of nickel alloy that is resistant to crevice corrosion and phosphoric acid corrosion.
Chemical Composition of Ni-Cr-Mo Alloy
Ni-Cr-Mo alloy is a type of nickel alloy composed of a certain proportion of chromium, molybdenum and other alloying elements. The exact composition of the alloy will depend on the specific application, but generally it contains at least 10-15% chromium, 2-8% molybdenum and 0.1-1% copper. In some cases, other elements including manganese, silicon, nitrides and carbon may also be added.
Corrosion Resistance of Ni-Cr-Mo Alloy
Ni-Cr-Mo alloy is known for its excellent corrosion resistance, particularly against crevice corrosion, pitting corrosion and phosphoric acid corrosion. This is due to the chromium element, which forms a protective chromium oxide film on the surface of the alloy and prevents corrosive agents from attacking the underlying metal. The other elements in the alloy also play a role in strengthening its corrosion resistance.
Applications of Ni-Cr-Mo Alloy
Due to its excellent corrosion resistance, Ni-Cr-Mo alloy is widely used for various applications. For example, it is used for components and fittings in oilfield equipment, stainless steel piping, valves, pumps and heat exchangers in chemical plants. It is also used for food and pharmaceutical processing equipment, nuclear power and medical implants. In addition, it is commonly used in marine and offshore applications due to its excellent resistance to saltwater corrosion.
Conclusion
Nickel alloy is a type of alloy material composed of nickel as the base element, chromium and various other alloying elements. Ni-Cr-Mo alloy is a type of nickel alloy that is resistant to crevice corrosion and phosphoric acid corrosion, due to its high chromium content. It is widely used in many industries and applications due to its excellent corrosion resistance and other properties.
