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High-Temperature Corrosion Behavior of 3D-Printed Scalmalloy in Sulfate-Chloride Environments.

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Bibliographic Details
Title: High-Temperature Corrosion Behavior of 3D-Printed Scalmalloy in Sulfate-Chloride Environments.
Authors: Senthilkumar, B. R.1 (AUTHOR), Senthil Kumar, S.2 (AUTHOR), Yokeswaran, R.3 (AUTHOR), Senthilkumar, T. S.3 (AUTHOR) senthilk.kumar6@gmail.com
Source: Journal of Materials Engineering & Performance. Jan2026, Vol. 35 Issue 2, p1715-1727. 13p.
Subjects: Corrosion engineering, Deterioration of materials, Protective coatings, Three-dimensional printing, Surface coatings, High temperatures
Abstract: Corrosion characteristics of Scalmalloy 3D printed in sulfate–chloride environments at high temperatures (250 and 350 °C) are studied here to determine its strength for high-performance usage. Two corrosive solutions, V2SO4 (60%)+NaCl (40%) and Na2SO4 (50%)+NaCl (50%), were used to corrode the alloy for 72 hours, and weight loss measurement was taken as an important sign of material degradation. The total weight loss at 250 °C was 0.01938 g in the case of V2SO4+NaCl and 0.06418 g in the case of Na2SO4+NaCl, whereas at 350 °C it was 0.05609 g and 0.03060 g, respectively. The higher weight loss at higher temperatures signifies the increased breakdown of the protective oxide layer due to the dissociation of V2SO4 with the evolution of SO2 gas and enhanced sulfidation. Widespread surface deterioration was observed with Scanning Electron Microscopy, while energy-dispersive x-ray analysis confirmed the presence of Al, Fe, O, Na, and Cl, a reaction between the alloy and the corrosive environment. To prevent corrosion and to ensure good long-term behavior of 3D-printed Scalmalloy under harsh environments, advanced coatings or alloy optimization can be used. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Corrosion characteristics of Scalmalloy 3D printed in sulfate–chloride environments at high temperatures (250 and 350 °C) are studied here to determine its strength for high-performance usage. Two corrosive solutions, V2SO4 (60%)+NaCl (40%) and Na2SO4 (50%)+NaCl (50%), were used to corrode the alloy for 72 hours, and weight loss measurement was taken as an important sign of material degradation. The total weight loss at 250 °C was 0.01938 g in the case of V2SO4+NaCl and 0.06418 g in the case of Na2SO4+NaCl, whereas at 350 °C it was 0.05609 g and 0.03060 g, respectively. The higher weight loss at higher temperatures signifies the increased breakdown of the protective oxide layer due to the dissociation of V2SO4 with the evolution of SO2 gas and enhanced sulfidation. Widespread surface deterioration was observed with Scanning Electron Microscopy, while energy-dispersive x-ray analysis confirmed the presence of Al, Fe, O, Na, and Cl, a reaction between the alloy and the corrosive environment. To prevent corrosion and to ensure good long-term behavior of 3D-printed Scalmalloy under harsh environments, advanced coatings or alloy optimization can be used. [ABSTRACT FROM AUTHOR]
ISSN:10599495
DOI:10.1007/s11665-025-11879-y