Corrosion behaviour of Inconel 600 and 601 in orthophosphoric acid solutions

Vishnudevan, M.; Venkatachari, G.; Muralidharan, S.; Rengaswamy, N.S.

doi:10.1108/00035599810223788

Cited by 1 publication

(3 citation statements)

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“…The results were similar in magnitude to the reported corrosion rates of the alloy when exposed to orthophosphoric acid. 4 By obtaining the respective corrosion activation energies, it is then possible to determine the corrosion rates at higher temperatures and determine if the alloy is suitable for certain high-temperature engineering applications.…”

Section: Figurementioning

confidence: 99%

“…1 Inconel 600™ is utilized in many different highly corrosive and high temperature environments with some of the most noteworthy being the chemical manufacturing industry, aerospace, nuclear engineering components and gas turbine components. 2 In other studies, the corrosion behaviour of Inconel 600™ and Inconel 601™ were examined in solutions of orthophosphoric acid, between concentrations of 0.5 N and 15 N. 4 Inconel 600™ was found to have a smaller passivation range than Inconel 601™ and was also found to be more corrosive. The studies showed that the corrosion rates at ambient temperature would typically vary between 0.040 to 1.097 mm yr -1 in acid solutions of 0.5 N to 15 N, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The studies showed that the corrosion rates at ambient temperature would typically vary between 0.040 to 1.097 mm yr -1 in acid solutions of 0.5 N to 15 N, respectively. 4 In another study, the anodic corrosion behaviour of Inconel 600™ in sulphuric acid was studied by means of anodic polarization and electrochemical impedance spectroscopy (EIS). 5 The corrosion rates reported varied between 0.033 and 0.8344 mm yr -1 and were obtained in solutions that varied between 0.01 M to 10.00 M, respectively.…”

Section: Introductionmentioning

confidence: 99%

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An Investigation into the Corrosion Rates of Inconel 600™ in Different Corrosive Solutions

2019

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Inconel 600™, an austenitic high nickel alloy, has relatively low corrosion properties and is used extensively for aerospace and nuclear engineering applications. Other applications include exposure of the material to caustic and acidic environments and possible use in prosthetic implants. Electrochemical techniques, which include potentiodynamic polarization and polarization resistance, provide a means to rapidly determine the corrosion rates and the suitability of the alloy in a specific corrosive environment. The results from these two techniques were used to determine the corrosion rates as well as other thermodynamic properties for the alloy exposed to various strong and weak acids, salt and Ringer's solution. The results showed slight differences in the corrosion rates determined by the two electrochemical techniques, with those from the polarization resistance technique being on average larger. The corrosion activation energies determined for the alloy in different solutions were indicative of the corrosion rates with some anomalies in values for results observed in the 10 % acetic acid solution. The microstructural composition of the alloy was also investigated by SEM-EDS and showed peculiar inclusions that can contribute to an acceleration of the corrosion rates.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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