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Corrosion of platinum electrodes in phosphate buffered saline solution
Author(s) -
Zeitler S.,
WendlerKalsch E.,
Preidel W.,
Tegeder V.
Publication year - 1997
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19970480506
Subject(s) - platinum , corrosion , saline , electrode , phosphate , phosphate buffered saline , materials science , chemistry , inorganic chemistry , metallurgy , medicine , chromatography , catalysis , biochemistry
A high sensitive detection method allows the direct determination of Pt 2+ /Pt 4+ within a concentration range of ng/1 (ppt). The procedure was used to establish the development of soluble platinum species during constant or dynamic polarisation of platinum electrodes in phosphate buffered saline solution. Platinum showed some properties of a passive metal. In the passivated state the dissolution was influenced by a surface film. Furthermore a soluble platinum species was found to be produced during the reduction of the surface oxide. These results confirmed by direct evidence the conclusions of earlier investigations concerning the corrosion of platinum based on electrochemical measurements.