3.3 Improved Performance of Organic Zinc-Rich Primers via Microencapsulated Healing Agents
(Room 237-239)
09 Apr 18
3:00 PM
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3:30 PM
Tracks:
Session 3: Functional and Smart Coatings
Zinc-rich coatings are used extensively in a variety of industries for the corrosion protection of steel substrates in extremely corrosive environments. It is widely known that these coatings provide sacrificial cathodic protection to steel via galvanic corrosion of zinc particles. In general, the sacrificial protection persists as long as contact between the zinc particles and with the substrate is maintained. With exposure to a corrosive environment over time, the zinc particles corrode, forming a non-conductive oxide layer around the particles. The non-conductive oxide layer compromises the conductivity of the galvanic protection system impairing its protective capability.
In this talk, we will report on our efforts to exploit potential synergies between the galvanic protection of steel substrates offered by organic zinc-rich primers and self-healing functionality designed into the coating for the extension of the lifetime of the protective system. We will discuss design elements employed, characterization methods, results obtained and their implications for a smarter protective system for steel substrates.