Ag AgCl Reference Electrode

Cathodic protection is divided into impressed current cathodic protection (ICCP) and sacrificial anode cathodic protection (SACP). Reference electrode is an important part of impressed current cathodic protection system. The reference electrode is an electrode used as a reference when measuring various electrode potentials. Common reference electrodes include Ag / AgCl reference electrode, high-purity zinc reference electrode, copper / saturated copper sulfate reference electrode, etc.

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Ag / AgCl reference electrode is mainly used in seawater environment;

High-purity zinc reference electrode is mainly used in seawater or soil environment;

Copper / saturated copper sulfate reference electrode is mainly used in soil environment;

The electrochemical properties of the reference electrode are as follows：

Anode type	Electrode potential (relative to saturated calomel electrode) V	Potential stability V	Polarization value
Anode type		Potential stability V	Cathodic polarization current 10μA	Anodic polarization current 10μA
Ag / AgCl reference electrode	+0.0015～+0.0095	±0.005	＞-0.005	＜+0.005
High-purity zinc reference electrode	-1.044～-1.014	±0.015	＞-0.020	＜+0.020
Copper / saturated copper sulfate reference electrode	+0.069～+0.074	-	-	-

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