By Peter Zarras, John D. Stenger-Smith, Yen Wei
Electroactive Polymers for Corrosion Control is designed to aid chemists and engineers hinder corrosion of metals. This e-book discusses electroactive polymers, electrically conductive polymers, and mechanisms of corrosion safeguard (passivation of metals).
Professor Alan MacDiarmid, 2000 Nobel Laureate, provides a short overview of the historical past of electroactive fabrics with a normal realizing of the synthesis of electroactive fabrics and corrosion in aqueous environments.
Several authors clarify the phenomena of corrosion and suggest mechanisms during which electroactive polymers inhibit corrosion. a number of experiences contain present state of the art synthesis of electroactive polymers, and information assisting the prevention of corrosion in a variety of media are mentioned. furthermore, new strategies for measuring the onset of corrosion are awarded.
Chapters during this quantity symbolize a vast diversity of recent electroactive fabrics utilized in corrosion prevention and methods used to degree corrosion. either fabrics scientists and engineers will locate this e-book priceless for figuring out and fighting corrosion. choices to standard barrier coatings used to avoid or retard corrosion also are mentioned. even supposing formerly released books have serious about natural and inorganic barrier coatings to avoid corrosion, this publication focuses solely on electroactive polymers and their functionality in retarding corrosion. Electroactive polymers signify a brand new, environmentally pleasant method of corrosion prevention.
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Additional info for Electroactive Polymers for Corrosion Control
Historical Background 1 The seminal publication in 1977* by MacDiarmid, Heeger and Shirakawa - describing the synthesis of electrically conductive polymers, focused my interest on this area of research. This work has led to the development of a new type of corrosion resistant coating. Their paper (-published in Chemical Communications-) showed that the reaction of iodine with polyacetylene (PAc) resulted in a new polymeric compound, a radical-cation salt, which had a conductivity much higher than the original neutral PAc.
The question to be evaluated was: Is there a difference in the delamination velocity? Table 1 shows the answer „Yes": after 24 hours, significant differences can be noticed. Note, that the performance order is in parallel with all other results. Primer formulations (same basis) without polyaniline under even the best top coats show 5-10 times quicker delamination. The best top coat on CORRPASSIV™ primer alone (on epoxy primer or even on Zn-rich epoxy primer) does not perform comparably well at all.
However, these polymers were insoluble and unmoldable (and unstable). Our approach to solving this problem was to make them dispersable. It took more than 5 years to prepare the first dispersion of PAc, which was based on the discovery that the conducting polymers are composed primarily not by fibrillar structures but by even smaller globular particles. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2003. 35 entities that display all the properties seen in macroscopic conductive polymers - range from 10 - 15 nm in size.