Showing posts with label Nickel Round Bars. Show all posts
Showing posts with label Nickel Round Bars. Show all posts

Thursday, April 18, 2019

Know about nickel Alloys and its resistance to corrosive environments


In 1751, the nickel (Ni) was discovered in Stockholm, Sweden by A.F Cronstedt and added to the periodic table. Nickel is a silver whitish metal that is found on sulfide and arsenic ores. It is derived by roasting to NiO and reducing the carbon elements. Carbonyl process is used to manufacture pure nickel grade. On the other hand, the impure nickel grade reacts with carbon monoxide to form Ni (CO) 4. This is subsequently decomposed at 200 deg C to succumb nickel alloy.

The pure nickel grade has resistance to corrosion in water or air. Thus, it is used as a protective coating. The nickel grade is malleable, ductile and readily soluble in dilute acids, however, the alkalis will not affect it.

The nickel grades are widely used, ranging from industrial to engineering applications. Mainly, the nickel grade is used as a constituent of different types of alloys. Additionally, these are utilized as a protective coating in the food and chemical processing industries. It is known as a carcinogen. Nickel is also an allergen to certain individuals. However, it is a part of many dietetic constituents, and hence cannot be removed easily.

The brief description of nickel alloy:
It is a commercially pure (CP) grade having the properties that are ideal for several fields, mainly in chemical processing and electronics applications. It has great resistance to many reducing chemicals and is matchless resistance to caustic alkalies. The commercially pure nickel has high thermal and electrical conductivity. The nickel alloys have higher core temperatures and also possess good magnetostrictive properties. In the annealed condition the nickel grade has a low hardness and good ductility and malleability. These properties are joined with great readability makes it highly fabricable.

Nickel Alloy is divided into 2 grade 200 and 201. Nickel alloy 200 Round Bars has a relatively low work hardening rate; however, it can be cold worked to achieve moderately high strength and maintains ductility. The nickel alloys have good mechanical properties and outstanding resistance to many corrosive environments. Some other salient features of an alloy are its magnetic properties, low gas content, low vapor pressure, and more.

The corrosion resistance of nickel alloys makes it particularly useful for maintaining product purity in the handling of synthetic fibers, and other demanding media. These are used in the structural applications where corrosion resistance is the prime issue.

The nickel alloy is considered as the superalloy due to its features offers to any application. These are easily alloyed with any types of alloying elements and enhance their properties. The nickel alloys offer great resistance to pitting and crevice corrosion cracking in the environments that contain warm chlorides. These can be exposed to elevated temperatures without any elongation and distortion.
The nickel grade offer service in the exposure of harsh chemicals such as nitric acids, sulfuric acids, phosphoric acids, and other harsh acids. Advantageously, these are inherent to the application in organic and inorganic compounds. In the mild cyclic environments, nickel alloys offer service while retaining its structure and offering less erosion. These are well suited for the chromium carbide precipitation range.