Corrosion Resistance of Cold-Sprayed Coatings

Abstract

This chapter presents the corrosion properties of cold-sprayed coatings. Cold spraying has shown its potential producing corrosion-resistant coatings for several operation conditions due to the fact that dense and protective metallic and composite coatings can be manufactured by using cold spray processes, examples are presented in Fig. 13.1. This enables the use of cold-sprayed coatings as corrosion barrier coatings. In addition to corrosion resistance, other advantages of cold-sprayed coatings are dealing with high strength, electrical conductivity and minimal or compressive residual stresses as well as repairing and additive manufacturing (Papyrin et al., Cold spray technology, 1st edn. Elsevier, printed in the Netherlands, 328 p, 2007; Champagne and Helfritch, Int Mater Rev 61(7):437–455, 2016; Champagne, The cold spray materials deposition process: fundamentals and applications. Woodhead Publishing Ltd., Cambridge, 362 p, 2007; Koivuluoto, Microstructural characteristics and corrosion properties of cold-sprayed coatings, Doctoral Thesis, Tampere University of Technology, Tampereen Yliopistopaino Oy, Tampere, 153, 2010; Villafuerte, Modern cold spray – materials, process, and applications. Springer International Publishing, p 429, 2015). Corrosion properties and behavior of the cold-sprayed coatings are increasingly reported in the literature during last years. Recently, review papers concerning corrosion properties of cold-sprayed coatings have been published by Bala et al. (Surf Eng 30(6):414–421, 2014), Koivuluoto and Vuoristo, (Surf Eng 30:404–414, 2014) and Hassani-Gangaraj et al. (Surf Eng 31(11):803–815, 2015). Furthermore, cold spraying can be used for corrosion protection as well as repairing of corrosion defects (Vardelle et al., J Therm Spray Technol 25(8):1376–1440, 2016).