In extreme environments containing corrosive acids and other corrosive media, nickel alloys require hard work. Even in the harshest conditions, INCONEL alloy C-276 is a popular choice. Here, we look at its characteristics and why they are suitable for these harsh environments.
There are many factors to consider when selecting suitable materials for harsh industrial environments. You need to know what kind of corrosive medium will be present, what is the operating temperature range, and what load the material will bear. In harsh conditions, materials will need to be able to operate under some of the most corrosive conditions on the planet, high temperatures and pressures.
It is not easy to find an alloy that can survive in this extreme environment. INCONEL C-276 alloy is a material worth considering because of its excellent corrosion resistance to a variety of aggressive media. It is widely used in a variety of different industrial applications and is considered to be one of the most versatile options in harsh environments. As a nickel alloy supplier, Shanghai Muyan Alloy has a comprehensive understanding of each material and has extensive experience in the performance, characteristics and application of this technologically leading alloy.
Main features of INCONEL alloy C276
Reason why INCONEL alloy C-276 is used in harsh environments is due to the properties of its nickel alloy. It is a nickel-chromium super alloy with high molybdenum content (15-17%). You can also control the content of tungsten and iron, and strictly limit the carbon content. Low carbon content can minimize the precipitation of carbides during heat treatment and welding. This means that when the alloy is used in welded structures, it still retains its excellent resistance to pitting and crevice corrosion. In other materials, the welded area becomes weaker when heated during the welding process, so it is more resistant to corrosion. INCONEL alloy C-276 is sometimes covered with low-alloy materials in the welding area to provide additional protection and even have higher performance in industrial applications.
Corrosion resistance of this material is one of its main highlights. Even in very harsh environments, it can well resist general corrosion, such as stress corrosion cracking, pitting and crevice corrosion. It also has great resistance to sulfuric acid, hydrochloric acid and phosphoric acid. Highly oxidizing, neutral and acid chlorides; and solvents, formic acid and acetic acid, acetic anhydride, wet chlorine, hypochlorite and chlorine solutions. This is why it is well used in the chemical processing industry. Finally, it also has excellent resistance to seawater corrosion, especially under crevice conditions.
Industry Application of INCONEL alloy C276
With such a wide range of resistance, it is no wonder that INCONEL alloy C-276 is used in many industrial applications.
For example, it is used in flue gas desulfurization (FGD) systems to control air pollution in power plants. Its components include scrubbers, pipes and chimney linings. Compared with other alloys, INCONEL C-276 alloy has the ability to withstand higher chloride content before localized corrosion occurs. In view of the chlorides contained in the scrubber liquid and gas condensate, this is undoubtedly the first choice in this industry.
Nickel alloy has also been selected for certain oilfield and subsea applications. When recovering and processing sour natural gas (usually containing hydrogen sulfide, carbon dioxide and chloride), the material needs to have good resistance to sulfide stress cracking and stress corrosion cracking. INCONEL alloy C-276 has a high content of nickel, chromium and molybdenum, even at high temperatures in deep wells, they can work together to provide this resistance. It is used for things like pipelines, downhole and surface components.
Its components can also be used for pollution control and waste treatment in very harsh environments. The high molybdenum content in INCONEL alloy C-276 helps to form resistance to pitting and crevice corrosion. It is used in the most aggressive parts of the waste liquid treatment system, where other materials will not be able to cope with the harsh conditions. In terms of air pollution control, the alloy is used in chimney linings, pipes, dampers, scrubbers, chimney gas reheaters, fans and fan covers.
INCONEL alloy C-276 is also an important material in chemical processing. It has been selected for use in processes containing ferric and copper chloride ions, chlorine, hypochlorite, chlorine dioxide, organic acids, acetic anhydride, sea water, brine, and acid oil and natural gas wellhead fluids. It is used in heat exchangers, reaction vessels, evaporators and conveying pipelines.