C-276 alloy is an important nickel-based corrosion-resistant material. Because it contains about 16% (mass fraction) of Mo and Cr, it has strong resistance in both oxidizing and reducing media. It is called a general-purpose corrosion-resistant alloy. Compared with general stainless steel and other corrosion resistant materials, it has the ability to withstand various forms of corrosion damage (including uniform corrosion, local corrosion and stress corrosion) in various corrosive environments, including electrochemical and chemical corrosion. It has good mechanical properties and processing properties, especially suitable for harsh media environments in many fields such as chemical manufacturing, power plant flue gas desulfurization, paper making, marine development, etc. It is also considered to be the most widely used nickel-based corrosion-resistant alloy in the world. one.
5.1 0-276 alloy and its properties
The Hastelloy C alloy is a Ni-Cr-Mo alloy. Since nickel itself is a face-centered cubic structure, the crystallographic stability makes it possible to accommodate more alloying elements (Cr, Mo, etc.) than iron-based alloys, and thus can form a wide range of alloys to resist various environments. Ability. The Ni-Cr-Mo corrosion resistant alloy still has a single-phase face-centered cubic structure, that is, an austenite (y) structure, in the case of containing a large amount of elements such as Cr and Mo. Moreover, because nickel itself has a certain degree of corrosion resistance, especially resistance to stress corrosion caused by chlorine ions, it is unmatched by all stainless steels. Therefore, the Ni-Cr-Mo corrosion resistant alloy exhibits excellent corrosion resistance. They also have good corrosion resistance not only in oxidizing medium but also in reducing medium, especially in the oxidizing acid of F- and CI-plasma, in the reducing acid in the presence of oxygen or oxidizing agent, In the mixed acid of an oxidizing acid plus a reducing acid, it is difficult to compare corrosion resistance with other corrosion resistant alloys in both wet chlorine and chlorine-containing aqueous solutions.
In order to reduce costs,there are some grades in the corrosion resistant alloys. In order to improve the corrosion resistance and mechanical properties of the alloys, some Ni-Cr-Mo corrosion resistant alloys also contain a small amount of W.
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Post time: Aug-12-2018