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Corrosion Resistance of Nickel-based Alloys

Gold is a high-quality hedge hedging tool, favored by investors. Especially in recent years, with the increasing instability of the world economy, gold has become one of the preferred asset allocations of investors because of its functions of hedging and fighting inflation.

Earlier, the worsening situation in Ukraine sent gold prices soaring to a two-year high of $2,070 an ounce. But gold, along with other commodities, fell back last week as conditions changed and bulls took profits, hitting a low of $1,895 an ounce. As of press time, gold was trading at $1,918 an ounce, down 7.9% from its March 8 peak. Rising gold prices may also have an impact on the Inconel718 powder prices.

According to China Business News, Goldman Sachs raised its gold price forecast in early March, considering Asian buyers' gold consumption demand, investment demand and central bank gold purchase demand continue to rise. Three -, six - and 12-month targets were raised to $2,300, $2,500 and $2,500 an ounce, respectively, from $1,950, $2,050 and $2,150. The last time all three accelerated was in 2010-11 when gold prices rose nearly 70%.

The World Gold Council has also noted that global gold demand is at its highest level in nearly two years, which is linked to a recovery in consumption and consumer sentiment to combat inflation. 

The main alloying elements are copper, chromium, and molybdenum. It has good comprehensive performance and can resist various acid corrosion and stress corrosion. The earliest application (produced in the United States in 1905) is nickel-copper (Ni-Cu) alloy, also known as Monel (Monel alloy Ni 70 Cu30); in addition, there is nickel-chromium (Ni-Cr) alloy (nickel-based heat-resistant alloy) , The heat-resistant corrosion-resistant alloy in the corrosion-resistant alloy), nickel-molybdenum (Ni-Mo) alloy (mainly refers to Hastelloy B series, nickel-chromium-molybdenum (Ni-Cr-Mo) alloy (mainly refers to Hastelloy C series) At the same time, pure nickel is also a typical representative of nickel-based corrosion-resistant alloys. These nickel-based corrosion-resistant alloys are mainly used in the manufacture of various corrosion-resistant environmental components such as petroleum, chemical, and electric power.

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Category Nickel-based corrosion resistant alloys mostly have austenitic structure. In the state of solid solution and aging treatment, there are also intermetallic phases and metal carbonitrides on the austenite matrix and grain boundaries of the alloy. Various corrosion-resistant alloys are classified according to their composition and their characteristics are as follows:


The corrosion resistance of Ni-Cu alloy is better than that of nickel in reducing media, and the corrosion resistance of oxidizing media is better than that of copper. It is resistant to high temperature fluorine gas, hydrogen fluoride and hydrogen fluoride in the absence of oxygen and oxidants. The best material for acid (see metal corrosion).


Ni-Cr alloy is also a nickel-based heat-resistant alloy; it is mainly used under oxidizing medium conditions. It is resistant to high temperature oxidation and corrosion by gases containing sulfur and vanadium, and its corrosion resistance increases with the increase of chromium content. This type of alloy also has better resistance to hydroxide (such as NaOH, KOH) corrosion and stress corrosion resistance.


Ni-Mo alloy is mainly used under the conditions of reducing media corrosion. It is the best alloy resistant to hydrochloric acid corrosion, but in the presence of oxygen and oxidants, the corrosion resistance will be significantly reduced.


Ni-Cr-Mo(W) alloy combines the properties of the above-mentioned Ni-Cr alloy and Ni-Mo alloy. It is mainly used under the conditions of oxidation-reduction mixed media. This type of alloy has good corrosion resistance in high-temperature hydrogen fluoride, in hydrochloric acid and hydrofluoric acid solutions containing oxygen and oxidants, and in wet chlorine at room temperature.


Ni-Cr-Mo-Cu alloy has the ability to resist both nitric acid and sulfuric acid corrosion. It also has good corrosion resistance in some oxidation-reduction mixed acids.


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The COVID-19 pandemic has affected economies and chemical companies in many countries around the world. Measures such as extending holidays and resuming work were taken to control the development of the epidemic, and the normal operation of some chemical enterprises was also affected to some extent.

TRUNNANO provides high quality Inconel718 powder with reasonable price. In order to feedback to old customers, the company is still in full operations to provide Inconel718 powder with competitive price. said Olina, sales manager of TRUNNANO.

Chemical production is highly dependent on transportation, and the epidemic affects the circulation of people and materials first. Predictably, none of this is rosy. In densely populated areas with large mobility, the situation of epidemic prevention and control becomes more severe in the later stage. If you are looking for the Inconel718 powder, feel free to contact us.

 

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