Galvanic Coupling and Corrosion Rate | Free Online Course | Alison
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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.

Science
Free Course
Galvanic Coupling and Corrosion Rate in Active Metals is a free online course that teaches you about the different values of half-cell, anodic and cathodic reactions, as well as the sacrificial anode effect in reference to the atmosphere and the environment. You will also learn about the effect of magnesium and zinc on iron corrosion when they are galvanically coupled.
  • Duration

    4-5 Hours
  • Certification

    Yes
  • Mobile Friendly

    Yes
  • Publisher

    NPTEL
  • Accreditation

    CPD

Description

Modules

Outcome

Certification

View course modules

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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Learning Outcomes

Upon successful completion of this course, you should be able to:


  • Discuss the cathodic, anodic and half-cell reactions can have different values
  • Analyze the relationship between exchange current density and corrosion rate
  • Outline the parallel line of individual Tafel lines for hydrogen evolution reaction on a zinc surface
  • Evaluate the concepts of galvanization and cathodic protection
  • Discuss the effect of velocity on the corrosion rate in both types of controlled environments
  • Analyze the dissolution rate of zinc and iron when placed or added in an electrolyte
  • Outline the relationship between corrosion current density and the Tafel slope
  • Explain how the standard calomel electrode works.

Certification

All Alison courses are free to enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire an official Certificate, which is a great way to share your achievement with the world. Your Alison Certificate is:

Ideal for sharing with potential employers - include it in your CV, professional social media profiles and job applications
An indication of your commitment to continuously learn, upskill and achieve high results
An incentive for you to continue empowering yourself through lifelong learning

Alison offers 3 types of Certificates for completed Certificate courses:

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