The paper outlines details of a mathematical model and a series of experiments performed to evalu... more 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.
The Three dimensional Scanning Vibrating Electrode Technique (3D SVET) – which allows the measure... more The Three dimensional Scanning Vibrating Electrode Technique (3D SVET) – which allows the measurement of non-planar samples - has been used to investigate the effects that spot weld tip lifetime (i.e. number of welds produced by a tip between dressings) has on corrosion of spot welded steel. Cathodic activity is concentrated within the spot weld when weld tips are fresh (used for <10 welds) or aged (>1000 welds) whilst anodic activity is found on the spot weld perimeter. This is due to copper deposition within the weld and zinc enrichment around the spot weld as a result of the welding process.
The paper outlines details of a mathematical model and a series of experiments performed to evalu... more 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.
The Three dimensional Scanning Vibrating Electrode Technique (3D SVET) – which allows the measure... more The Three dimensional Scanning Vibrating Electrode Technique (3D SVET) – which allows the measurement of non-planar samples - has been used to investigate the effects that spot weld tip lifetime (i.e. number of welds produced by a tip between dressings) has on corrosion of spot welded steel. Cathodic activity is concentrated within the spot weld when weld tips are fresh (used for <10 welds) or aged (>1000 welds) whilst anodic activity is found on the spot weld perimeter. This is due to copper deposition within the weld and zinc enrichment around the spot weld as a result of the welding process.
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Papers by McMurray H.n.