Paints Part 1: Formulation and Protective Mechanisms

What you'll learn

• Identify and describe the four key ingredients of an anticorrosive paint and their role in the dried film
• Distinguish between binder types (epoxy, alkyd, polyurethane, acrylic) and explain how binder chemistry determines film properties
• Classify anticorrosive pigments as functional (inhibitive, sacrificial) or extender and explain their respective roles
• Define PVC and CPVC and explain why anticorrosive coatings must be formulated below the CPVC
• Describe the three types of anticorrosive coating — barrier, inhibitive primer, zinc-rich primer — and the mechanism of protection for each
• Explain how lamellar pigments enhance barrier performance by extending the diffusion path
• Describe the cathodic protection mechanism of zinc-rich primers using Evans diagram analysis
• Explain the multilayer coating system approach and the function of primer, intermediate coat, and topcoat
• Specify appropriate surface preparation requirements (cleanliness grade, anchor profile, soluble salt limits) for high-performance coating systems
• Explain why surface preparation is the single most important factor in coating performance

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.