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Complexity at a Humid Interface: Throwing Fresh Light on Atmospheric Corrosion.
Michael Dowhyj1,2, Kiran Kousar1, Francis P Lydiatt1,2
1Corrosion@Manchester, Department of Materials, The University of Manchester, Manchester, Manchester M13 9PL, U.K.
ACS Applied Materials & Interfaces
|April 23, 2025
Summary
Water vapor causes metal corrosion, but surface carbon contamination complicates this process. New research shows micropore filling and capillary condensation on carbon layers are key factors in atmospheric corrosion mechanisms.
Area of Science:
- Materials Science
- Surface Chemistry
- Corrosion Science
Background:
- Atmospheric corrosion of metals by water vapor is a significant issue in various applications.
- Existing models often overlook the role of surface contamination in corrosion initiation.
Purpose of the Study:
- To investigate the interaction of water vapor with zinc surfaces.
- To understand the influence of surface carbon contamination on water sorption and corrosion.
Main Methods:
- Near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS).
- Vibrational sum frequency spectroscopy (VSFS).
Main Results:
- Water sorption on zinc is complex, involving micropore filling and capillary condensation.
- An adventitious carbon layer significantly impacts water interaction with the zinc surface.
- Corrosion initiation may be linked to water condensation within surface carbon features.
Conclusions:
- Current atmospheric corrosion models need revision to include surface carbon contamination.
- Understanding water-carbon interactions is crucial for predicting and preventing metal corrosion in humid environments.
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