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 degrees off perpendicular: a finding validated by the experimental and literature data. (C) 2012 Elsevier Ltd. All rights reserved.