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Abstract

Chemistry

Imaging Corrosion at the Metal-Paint Interface Using Time-of-Flight Secondary Ion Mass Spectrometry

Published: May 6th, 2019

DOI:

10.3791/59523

1Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, 2Energy and Environment Directorate, Pacific Northwest National Laboratory, 3Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory

Abstract

Corrosion developed at the paint and aluminum (Al) metal-paint interface of an aluminum alloy is analyzed using time-of-flight secondary ion mass spectrometry (ToF-SIMS), illustrating that SIMS is a suitable technique to study the chemical distribution at a metal-paint interface. The painted Al alloy coupons are immersed in a salt solution or exposed to air only. SIMS provides chemical mapping and 2D molecular imaging of the interface, allowing direct visualization of the morphology of the corrosion products formed at the metal-paint interface and mapping of the chemical after corrosion occurs. The experimental procedure of this method is presented to provide technical details to facilitate similar research and highlight pitfalls that may be encountered during such experiments.

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