A necessary prerequisite for obtaining accurate and reproducible electrochemical polarization data is a properly-designed, working electrode assembly. Materials used in its fabrication must not contaminate the electrolyte and the specimen must be encased without creating interface crevices. Crevice effects are objectionable because they can introduce error and a lack of reproducibility in the passive current densities recorded during anodic polarization studies.1-3
Numerous techniques for mounting the working electrode are described in the literature,1-11 and it is recognized that most waxes, resins, varnishes, tapes, and paints are not satisfactory for specimen encapsulation.1-3 Of those techniques that reportedly avoid electrolyte contamination and crevice effects, many require specimens having complex shapes and/or stringent dimensional tolerances. It is the purpose of this communication to describe a working electrode assembly that combines the mandatory design requirements with other desirable features. Advantages of this assembly include: (1) avoidance of crevices and electrolyte contamination;...
