Effect of probe tip inclination on the response of the Scanning Vibrating Electrode Technique to an idealised pit-like feature

The paper outlines details of a mathematical model and a series of experiments performed to evaluate the extent to which SVET response artefacts are generated when scanning non-planar surfaces. This work establishes guidelines for SVET use and the potential issues that must be taken into account when using SVET to examine the corrosion behaviour of non-planar specimens. Results from the mathematical model indicates that response artefacts will be minimal until the probe/sample angle exceeds 30° off perpendicular; a finding validated by the experimental and literature data.

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► This research outlines a mathematical model for non-planar SVET scanning.
► Established guidelines and potential issues when examining the corrosion behaviour of non-planar specimens are outlined.
► Results from the model demonstrate that probe/sample angles of >30° from normal lead to distortion.