Study electrochemical reactions in corrosion, as well as the oxidation mechanisms of corrosion, in this free course. Two important aspects of electrochemical reactions are covered in this free online course. You will learn about the features and elements of passivation, as well as the interaction between polarization and the Pourbaix diagram. You will also be able to explain the calculation of Pilling-Bedworth ratio in different metals, as well as plot the Ellingham diagram. Start this course today to improve your understanding of electrochemical reactions.
| College | Alison |
| Course ID | 201645 |
| Course Type | Online Learning |
| Course Qualification | CPD Diploma |
| Course Duration | 10-15 hours |
| Course Fee | Free |
| Entry Requirements | Like all courses on the Alison Free Learning platform this is a free, CPD-accredited course. A Graduate can choose to buy a certificate or diploma upon successful completion of a course, but this is not required or necessary. At Alison we believe that free education, more than anything, has the power to break through boundaries and transform lives. Alison is the world’s largest free online empowerment platform for education and skills training, offering over 5000 CPD accredited courses and a range of impactful career development tools. It is a for-profit social enterprise dedicated to making it possible for anyone, to study anything, anywhere, at any time, for free online, at any subject level. Through our mission, we are a catalyst for positive social change, creating opportunity, prosperity, and equality for everyone. |
| Career Path | What You Will Learn In This Free Course • Distinguish between activation and concentration polarization • Describe the mixed potential theory • Explain the derivation of the Tafel equation and the Tafel slope • Discuss the evolution of the microstructure of pearlite • Identify the elements and features of passivation • Analyze the interaction between polarization and the Pourbaix diagram • Explain the corrosion rate of metals in a concentration-controlled environment • Analyze the effect of galvanic coupling in active-passive metals • Discuss how to calculate Pilling-Bedworth ratio • Outline the steps for drawing the Ellingham diagram |
| Course Code | 2814 |

Save power, improve security and reduce risks by learning how to install smart devices around your property.
Learn how to find and retain employees while bringing out their best with this free online management course.
Learn how managers streamline decision-making to make warehouses more efficient in this free online management course.
Uncover sales ‘secrets’ and learn how to use ChatGPT and AI to drive sales in this free online digital marketing course.