# Environmentally Friendly Anticorrosive Polymeric Coatings
## 6 Applications
Several reviews published in the literature provided an overview on environmentally friendly antifouling coatings and its application in marine environments [113, 114, 115]. Powder coating is a solvent-free technology, which is experiencing a rapid growth in the protective coating market. Powder coatings are used in many household appliances, aluminum products, and automotive parts. Their associated finish is usually harder and tougher than those obtained using conventional liquid paints. Epoxy powder coatings, known as fusion bonded epoxy, are especially indicated for corrosion protection of submerged pipelines, used as a single layer or in a multilayer coating system, providing very good barrier properties, wear resistance, and adhesion to the metal surface [116]. However, high solid and solvent-free technologies present a higher cost than traditional solvent-borne ones, currently. Along with this, the main challenge in this domain is to increase the resistance of the coating system to the chemical and physical stress encountered during service in order to reduce \begin{table}
\begin{tabular}{p{142.3 pt} p{284.5 pt}} \hline \hline
**Class Definition** & **Type of Structure That Needs an Anticorrosive Coating** \\ \hline C1, very low & Offices, shops, schools, hotels. \\ \hline C2, low & Rural areas, depots, sport halls. \\ \hline C3, medium & Urban, industrial and coastal atmospheres with low salinity, production rooms with high humidity and some air pollution (e.g., food processing plants, laundries, breweries, dairies). \\ \hline C4, high & Industrial and coastal areas with moderate salinity (e.g., chemical plants, swimming pools, coastal ships, boatyards). \\ \hline C5, very high & Industrial areas with high humidity and aggressive atmospheres and coastal areas with high salinity, metallic structures with almost permanent concentration and high pollution. \\ \hline CX, extreme & Offshore areas with high salinity and industrial areas with extreme humidity, aggressive atmosphere, and sub-tropical and tropical atmospheres. Industrial areas with extreme humidity and aggressive atmosphere. \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Classification of corrosive environments for steel structures according to ISO 12944-2:2017.  
the operation and maintenance costs and extend the service life of metallic structures, including offshore [41; 65]. Water-based pains are currently applied to protect metallic structures at corrosion levels that are relatively low or moderate, corresponding to C2/C3 (ISO 12944) [117; 118]. However, innovative water-based thin film [119], acrylic [120], Zn-rich [121], and silane [122] primers; and urethane, epoxy and acrylics topcoats [123] have recently been launched to the market to be applied under more demanding corrosion environments, found for instance in industrial coatings (e.g., containers), transportation coatings [123], building and construction coatings [124], and heavy-duty coatings (e.g., bridges, offshore, marine) [125; 126]. They are applied to new construction and steel repair applications in buildings, airports, civil structures, and power generation installations where long protection and environmental performance are a must.