Engineering and Technology

High-precision in situ 3D ultrasonic imaging of localized corrosion-induced material morphological changes

Y. Chen, Z. Yang, et al.

Discover a groundbreaking ultrasonic technique developed by Yunda Chen and colleagues for precise 3D monitoring of corrosion in carbon steel. With ultra-high resolution and impressive accuracy, this research sheds light on the dynamics of iron dissolution and corrosion product deposition in alkaline environments.

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Abstract

This research introduces a novel ultrasonic technique for in situ, 3D monitoring of corrosion substrate morphologies. The technique boasts customizable lateral resolution, ultra-high axial resolution (100 nm), and validated measurement accuracy. Experiments on carbon steel in alkaline environments revealed that iron dissolution initially accelerates, then slows, due to corrosion product deposition (Fe3O4) consuming electrons. The corrosion product layer eventually collapses, halting Fe3O4 formation.

Publisher

npj Materials Degradation

Published On

Sep 27, 2023

Authors

Yunda Chen, Zirui Yang, Xinru Bai, Fangxin Zou, Frederic B. Cegla

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