CorroZone Podcast · 16 Jun 2026
Corrosion Inhibitors
- Free
- Lecture
- Beginner
- ~32 min
Slowing corrosion chemically: classifying inhibitors as anodic, cathodic or mixed and their Evans-diagram effect, the 'dangerous inhibitor' acceleration risk, the molecular adsorption mechanism and the Langmuir isotherm, calculating inhibitor efficiency, application-specific selection, and the environmental/regulatory constraints including chromate replacement.
Show notes
What you'll learn
- Classify corrosion inhibitors by electrochemical action (anodic, cathodic, mixed) and explain how each class affects Evans diagrams and corrosion potential
- Explain the 'dangerous inhibitor' effect and predict when anodic inhibitors can accelerate localized corrosion
- Describe the molecular mechanism of organic adsorption inhibitors and relate surface coverage to the Langmuir adsorption isotherm
- Calculate inhibitor efficiency from corrosion rate or corrosion current data
- Select appropriate inhibitor types and testing methods for cooling water systems, oil and gas production, reinforced concrete, and protective coatings
- Evaluate the environmental and regulatory constraints on inhibitor selection, including the challenges of chromate replacement
Who this is for
Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.
What you'll learn
- Classify corrosion inhibitors by electrochemical action (anodic, cathodic, mixed) and explain how each class affects Evans diagrams and corrosion potential
- Explain the 'dangerous inhibitor' effect and predict when anodic inhibitors can accelerate localized corrosion
- Describe the molecular mechanism of organic adsorption inhibitors and relate surface coverage to the Langmuir adsorption isotherm
- Calculate inhibitor efficiency from corrosion rate or corrosion current data
- Select appropriate inhibitor types and testing methods for cooling water systems, oil and gas production, reinforced concrete, and protective coatings
- Evaluate the environmental and regulatory constraints on inhibitor selection, including the challenges of chromate replacement