CATHODIC PROTECTION TRAINING BENCH

The bench provides facilities to study the case of isolated systems, as well as the case of systems where different metals are coupled together.
Particular attention is given to the presence or not of several kinds of insulating materials over the surfaces of the samples, in order to demonstrate the different behavior of the same material when coated or bare.
The bench provides suitable devices to highlight the concept of the free corrosion potential, measured with easy to use reference electrodes and means suitable to build with a certain accuracy the polarization curves.
Protective techniques are represented as per sacrificial anodes systems of several type of metals as per impressed current Cathodic Protection
systems with the possibility to see which is the explanation of the use of constant voltage, constant current and constant potential feeders.

TRAINING OBJECTIVES
 The use of the voltmeter
 The measurement of the difference of potential of a sample into an electrolyte
 The reference cell
 The Daniel cell
 The first and second species conductors
 Introduction to the cathodic protection criteria
 Introduction to the sacrificial anodes in Zn, Mg, and Al
 Introduction to the cathodic protection impressed current system
 The consumable impressed current anode (Fe)
 The inert impressed anode (Fe-Si)
 Resistance concept, circuit for the first and second species conductors
 Introduction to the specific resistance concept over three different first species conductors (Fe; Cu; Fe-Ni)
 Introduction to the concept of interference due to the presence of external electric fields on buried or submerged structures (stray currents)
 Air presence influence on resistivity (insufflate air effect)
 Current density introduction and Tafel curves construction
 Temperature effect over the current density (thermostatic cell)
 Air presence influence over the current density (insufflate air effect)
 Coating and current density