Silver/silver-chloride Reference Electrode For Testing Cathodic Protection Corrosion Control Systems

Silver/silver-chloride Reference Electrode for testing cathodic protection corrosion control systems

55.0 USD

The electrode is a silver wire that is coated with a thin layer of silver chloride, either physically by dipping the wire in molten silver chloride.

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Product Attribute

Min. Order 1 Meter
Trade Term FOB,CFR,CIF,DDP,EXW
Payment Terms L/C, T/T, WU
Place of Origin Shaanxi, China (Mainland)
Means of Transport Ocean, Air, Land
Production Capacity 500pcs in 20 days
Packing paper as inside,...
Delivery Date 2 days to 15 days...
Brand Name Taijin
Used in: electrochemical measurements
Substrate: silver rod and wire
Electrode reaction AgCl+e=Ag+Cl-
Standard weight: 0.8kg
Standard length: 400mm
Features: Stable potential
Function: Referenreference electrode ce electrode
Certification: ISO9001,SGS,DNV,BV,etc
Electrode: Ag/AgCl/3.5 mol/kg
Potential E0+Elj: +0.205

Product Description


Silver/silver-chloride Reference Electrode

 

The silver/silver chloride reference electrode is a widely used in the cathodic protection system of sea water applications, performing corrosion potential surveys on boats, yachts and wharfs. This is an extremely useful test and diagnostic tool that should be included within the toolbox of every boat and marine operator.


A silver chloride electrode is a type of reference electrode, commonly used in electrochemical measurements. For example, it is usually the internal reference electrode in pH meters. As another example, the silver chloride electrode is the most commonly used reference electrode for testing cathodic protection corrosion control systems in sea water environments.


The electrode functions as a redox electrode and the reaction is between the silver metal (Ag) and its salt — silver chloride (AgCl, also called silver(I) chloride).

The corresponding equations can be presented as follows:

or an overall reaction can be written:

This reaction is characterized by fast electrode kinetics, meaning that a sufficiently high current can be passed through the electrode with the 100% efficiency of the redox reaction (dissolution of the metal or cathodic deposition of the silver-ions). The reaction has been proven to obey these equations in solutions of pH values between 0 and 13.5.

The Nernst equation below shows the dependence of the potential of the silver-silver(I) chloride electrode on the activity or effective concentration of chloride-ions:

The standard electrode potential E0 against standard hydrogen electrode (SHE) is 0.230V ± 10mV. The potential is however very sensitive to traces of bromide ions which make it more negative. (The more exact standard potential given by an IUPAC review paper is 0.22249 V, with a standard deviation of 0.13 mV at 25 °C.)



l  Specifications
Part Number: TJRS                      
Dimensions:1-1/2" dia. x 6"
Weight:0.4 lbs
Cable length:25 feet
Connector: Banana plug, compatible with handheld digital multimeters


2  Reference Electrode Potentials

ElectrodePotential E0+EljTemperature Coef.

(V) at 25 °C(mV/°C) at around 25 °C
SHE0.0000.000
Ag/AgCl/Sat. KCl+0.197-1.01
Ag/AgCl/3.5 mol/kg KCl+0.205-0.73
Ag/AgCl/3.0 mol/kg KCl+0.210
Ag/AgCl/1.0 mol/kg KCl+0.235+0.25
Ag/AgCl/0.6 mol/kg KCl+0.25



3.  Advantages:

Low cost

Easy to install

Reliable

Rugged

Customized as clients' actual application conditions


4.  Features:

  • Simple construction

  • Inexpensive to manufacture

  • Stable potential

  • Non-toxic components