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Galvanic Coupling and Corrosion Rate in Active Metals
Study galvanic coupling and corrosion rate in active metals, as well as sacrificial anode effect, in this free course.
Publisher: NPTEL
Description
This course begins by introducing you to the different values of half-cell, anodic and cathodic reactions, and the relationship between exchange current density and corrosion rate in a metal. It will introduce to you the parallel line of individual Tafel lines for hydrogen evolution reaction on zinc and platinum surfaces. The corrosion current density of zinc and the area factor effect will also be covered in this free online course.
You will then look at galvanization as another form of cathodic protection where zinc acts as a sacrificial anode and iron is protected. Learn about the sacrificial anode effect in reference to the atmosphere and the environment, as well as the effect of magnesium and zinc on iron corrosion when they are galvanically coupled. This course will also teach you about the dissolution rate of zinc and iron when separately placed or added in an electrolyte, as well as the mixed potential point of the impressed current cathodic protection.
Furthermore, you get will familiar with the effect of velocity on the corrosion rate, as well as the relationship between velocity and corrosion rate, current density and overvoltage. You will also learn about the standard hydrogen electrode and saturated calomel electrode. So, register for this course now and start your next learning journey today if you are interested in metallurgy, especially galvanic coupling in active metals.
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