ABSTRACT
Metals and alloys form the backbone of industrial and engineering structures because of their high strength and ductility. However, metals in most environments are thermodynamically unstable and undergo corrosion to achieve a more stable state. The annual costs related to corrosion and its prevention have been estimated to constitute a significant part of the gross national product in the world [1]. Corrosion issues are therefore of great significance in modern societies. In addition to the economic costs and technological delays, corrosion can lead to catastrophic structural failures that have dramatic consequences on the environment [2,3]. Corrosion failures of bridges, buildings, aircraft, automobiles, and gas pipelines are very common. For the past several decades, both organic and inorganic coatings have been investigated extensively for the protection of metals against corrosion. An important aspect in the development of high-performance anticorrosive coating systems is the thorough knowledge and understanding of the interactions between the substrate and the applied
14.1 Introduction .......................................................................................................................... 395 14.2 Types of Anticorrosive Coatings .......................................................................................... 396
14.2.1 Barrier Coatings........................................................................................................ 397 14.2.2 Sacrificial Coatings ................................................................................................... 397 14.2.3 Inhibitive Coatings .................................................................................................... 398
14.3 Inorganic Coatings ................................................................................................................ 398 14.4 Conducting Polymer-Based Coatings ................................................................................... 399 14.5 Mechanism of Corrosion Protection with CP-Based Coatings ............................................400
