Silver Chloride Electrode Kits Sea Water Tidal Basin Marsh Land & Concrete
Sea Water – Tidal Basin – Marsh Land – Concrete
The sea water Kit is used in conjunction with an M. C. Miller Co., Inc. submersible adapter to measure the cathodic protection potentials. The sea water in which the electrode is immersed is the electrolyte. The Seawater electrode (half-cell) potential is a function of the salinity of the electrolyte into which the electrode is immersed. Please see “A Guide to Understanding Reference Electrode Readings”.
The Land Kit is supplied with a standard filling solution (3.5 M KCl), which acts as the electrolyte. This is a known electrolyte which can be used where the salinity of the sea water is unknown, as in brackish, fresh water / sea inlets. This is ideally suited for areas where chlorides would contaminate the Standard copper sulfate electrode. These areas would include concrete bridge decks (de-icing salts), swamps and marsh lands.
Ag / Ag / Cl / Sea Water Cu / CuSO4
|Cu / CuSO4||0.85 V||0.85 V||0.85 V|
|Ag / AgCl||0.79 V||0.83 V||0.88 V|
Standard Potentials to Hydrogen
|Ag / AgCl / KCl 0.1 M||289 mV||288 mV||278 mV|
|Ag / AgCl / KCl 1.0 M||231 mV||222 mV||216 mV|
|Ag / AgCl / KCl 3.5 M||215 mV||205 mV||197 mV|
|Ag / AgCl / KCl saturated||214 mV||199 mV||189 mV|
|Cu / CuSO4 / CuSO4 saturated||330 mV||316 mV||303 mV|