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Sustainable Electrochemical Machining of Additively Manufactured Nitinol with Deep Eutectic Solvents

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Abstract:

Additively manufactured Nitinol components often exhibit rough surfaces and defects that affect functional performance. This study investigates the feasibility of electropolishing Nitinol in a deep eutectic solvent (ethaline). Linear sweep voltammetry was used to identify anodic potentials suitable for controlled dissolution, and electropolishing was performed at selected potentials. Surface evolution was analysed by SEM, EDX, optical microscopy, and confocal microscopy. Electropolishing in ethaline effectively reduced surface scratches and produced more homogeneous surfaces without altering alloy composition. Higher applied potentials (12.5 V) resulted in complete removal of surface scratches and visually homogeneous surfaces, whereas lower potentials (6 V) mainly reduced the visibility of surface scratches. Compared to conventional inorganic electrolytes, the process exhibits a lower dissolution rate, offering a safer and more controllable approach.

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Info:

Periodical:

Key Engineering Materials (Volume 1047)

Pages:

175-181

Online since:

April 2026

Authors:

Alessia Serena Perna*, Fabio Scherillo

Keywords:

Additive Manufacturing, Electrochemical Machining, Nitinol, Sustainability

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RIS, BibTeX

Permissions:

Creative Commons CC BY 4.0

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* - Corresponding Author

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