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However it is chemically categorized as a weaker acid than hydrochloric or sulfuric acid, some materials are extremely corrosive more than even hydrofluoric acid. Use of gold and platinum are fully resistant to corrosion in aqueous solutions. The engineering materials that are significantly used in hydrofluoric acid owe their corrosion resistance to the development of … Continue reading Corrosion resistance behaviour of Nickel alloys in hydrofluoric acid

Inconel grades are high nickel alloys that are designed to resist corrosion specifically at the elevated points. They are recommended materials for use in sulfur-free media. Inconel alloys are suitable for use from cryogenic points to above 1200oF. They are widely used in the chemical units. Applications include heaters, stills, bubble towers, condensers for treatment … Continue reading How do Inconel alloys perform in varied service conditions?

The new face of oil and gas discovery will be with deep wells, specifically in deepwater. As compared to shallow wells, deep wells normally need high performance nickel base alloys. Wells are classified as sweet or sour. Sweet wells are just mildly corrosive, whilst sour wells are extremely corrosive. Sour wells contain hydrogen sulfide, carbon … Continue reading Performance of high functional nickel based super alloys in sour oil and gas conditions

Nickel based alloys containing chromium, molybdenum, tungsten and other elements are commonly used for equipment production in the petrochemical, chemical process and power plants due to their supreme corrosion resistance in the oxidizing and reducing conditions. The availability of sufficient chromium content enhances the development of passive barrier oxide layer of Cr2O3 on the surface … Continue reading How nickel based alloys perform against localized corrosion

Acid solutions are widely used in chemical industry to eliminate mill scales from metallic surface. The inclusion of inhibitors suitable secures the metal against an acid corrosion. Usually acid inhibitors are organic compounds comprising of nitrogen, oxygen and sulfur. These compounds are adsorbed on the metallic surface blocking the active corrosion sites. Due to toxicity … Continue reading Corrosion behaviour of nickel and its alloys in HCl and its prevention by natural rosemary oil

Nickel-Chromium-Molybdneum alloys were selected as suitable materials for nuclear waste containers as they provide outstanding resistance to localized corrosion in conditions that may occur at the permanent repository site. It was crucial to determine if prolong exposure to low temperatures would be harmful to the resistance property of Hastelloy C22 , C4 and C276 alloys … Continue reading Which alloy is the best fit for nuclear waste containers

The fracture hardness of Inconel alloy 625 in the cast and welded conditions has been evaluated as a part of complete properties of alloy for advanced steam turbine applications. The fracture properties of solution treated alloy vary because of prolong aging at 650oC, with metallurgical precipitation causing changes to critical toughness and fracture resistance profiles. … Continue reading Evaluation of Fracture toughness properties of Inconel grade 625

With the variety of different thermal spraying processes, a wide range of gases is used majorly in applications for fuel gases and oxygen. Different hydrocarbons, particularly acetylene and hydrogen are used. Besides the fuel characteristics, aspects of the gas supply system are also crucial. Flame spraying guns can commonly be used for different fuel gases … Continue reading How Arc spray coating improves the function of application components

Wrought weldable nickel-chromium alloy Inconel 718 is fit for service at moderate temperature about 1300oF. However not as strong as other super alloys that service from 1500oF to 1800oF, its combination of good mechanical and fabrication characteristics at high and low temperature has earned it an essential role in various aerospace equipments. It is used … Continue reading Why aging of Nickel-Chromium alloy Inconel 718 is necessary?

                        Nitric Acid (HNO3) Chromium is a major alloying element for corrosion resistance in HNO3 conditions because it quickly develops a passive layer in these conditions. So alloys containing higher chromium content offer better performance in HNO3. In these conditions, the high chromium alloys … Continue reading Corrosion behavior of nickel based alloys in industrial acidic media