On the Determination of Pitting Potentials by galvanostatic polarization techniques

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<jats:title>Abstract</jats:title><jats:p>Various characteristic pitting potentials are defined which may be observed in a system simultaneously. Following these definitions, galvanostatic polarization techniques are expected to result in potential oszillations whenever the pit nucleation potential, U<jats:sub>np</jats:sub>, differs from the critical potential for pit repassivation, U<jats:sub>cp</jats:sub>, of a system.</jats:p><jats:p>With nickel polarized in neutral, chloride containing sulphate solution the electrode potential oscillates periodically. The lower limit responds to the critical potential, U<jats:sub>cp</jats:sub>, determined by potentiostatic measurements.</jats:p>

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