Abstract
The controversial statements reported till now about the local conductivity of the solution at its interface with the corroded specimen affecting the SVET results were verified by the simultaneous application of a combination of two measuring techniques: SVET and conductometry. Bare and chromated AA 6061-T6 aerospatial aluminum alloy samples in 5% NaCl solutions were employed in the experiments. It was confirmed that the local conductivity variations are negligible above the chromated specimens obviously because of the pit sealing while about 4% changes were observed 5 minutes after the immersion of the bare samples. An approach for fast automatic detection of pit sites on the entire specimen surface, based on high resolution digital optical scanning coupled with image recognition software was developed and applied in the SVET/Conductivity experiments.
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