A double cycle polarisation (DCP) technique is describedfor studying the corrosion behaviour of metal matrix composites in deaerated 3·5 wt-%NaCl solution. The data obtained are compared with those from open circuit potential (OCP) and potentiostatic measurements. It is shown that pitting and protection potentials are more readily obtainedfrom the DCP method than from single cycle polarisation and that they are consistent with data from oCP and, potentiostatic tests.
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