Reference electrode for monitoring cathodic protection potential

Abstract:

Reference electrodes are used for monitoring cathodic protection potentials of buried or immersed metallic structures. In the market, many types of reference electrodes are available for this purpose, such as saturated calomel, silver/silver chloride and copper/copper sulfate. These electrodes contain a porous ceramic junction plate located at the cylindrical body bottom to permit ionic flux between the internal electrolyte of the reference electrode and the external electrolyte. In this work, the copper/copper sulfate reference electrode was modified by replacing the porous ceramic junction plate for a metallic platinum wire. The main purpose of this modification was to avoid the ion copper transport from coming from the inner reference electrode solution into the surrounding electrolyte and to mitigate the copper plating on the coupon surfaces. Lab tests were performed in order to compare the performance of the two mentioned reference electrodes. We verified that the experimental errors associated with the measurements conducted with developed reference electrode will be negligible, since the platinum surface area exposed to the surrounding electrolyte and/or to the reference electrolyte are maintained as small as possible.

Reference:
PANOSSIAN, Zehbour; ABUD FILHO, Sérgio Eduardo. Reference electrode for monitoring cathodic protection potential. In: INTERNATIONAL CORROSION CONGRESS, 19., 2014, Jeju, Korea. Proceedings… 13 p.

Document with restricted access. Login to BiblioInfo, Library/IPT-DAIT to access PDF text:
https://escriba.ipt.br/pdf_restrito/172716.pdf

Reference:
PANOSSIAN, Zehbour; ABUD FILHO, Sérgio Eduardo. Reference electrode for monitoring cathodic protection potential. Corrosion Science and Technology, v .16, n.5, p.227-234, 2017.

Document with restricted access. Login to BiblioInfo, Library/IPT-DAIT to access PDF text:
https://escriba.ipt.br/pdf_restrito/172716.1.pdf

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