Analytical techniques for corrosion studies on noble metals.
The suitability of various analytical methods for studying the corrosion of gold, silver and palladium in various electrolytes has been investigated. The methods included potentiometry with ion-selective electrodes, polarography and atomic-absorption spectrophotometry. All three methods are useful for monitoring low corrosion rates by solution analysis but each has its limitations. Concentrations in the ng/ml range can be measured routinely with errors of 10% or less.
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Laboratory for Research on the Structure of Matter, University of Pennsylvania Philadelphia, PA 19104, U.S.A.