Thermal Sprayed Coatings Used Against （热喷涂料使用）.pdf

1 Thermal Sprayed Coatings Used Against Corrosion and Corrosive Wear P. Fauchais and A. Vardelle SPCTS, UMR 7315, University of Limoges, France 1. Introduction Coatings have historically been developed to provide protection against corrosion and erosion that is to protect the material from chemical and physical interaction with its environment. Corrosion and wear problems are still of great relevance in a wide range of industrial applications and products as they result in the degradation and eventual failure of components and systems both in the processing and manufacturing industries and in the service life of many components. Various technologies can be used to deposit the appropriate surface protection that can resist under specific conditions. They are usually distinguished by coating thickness: deposition of thin films (below 10 to 20 µm according to authors) and deposition of thick films. The latter, mostly produced at atmospheric pressure have a thickness over 30 µm, up to several millimeters and are used when the functional performance and life of component depend on the protective layer thickness. Both coating technology can also be divided into two distinct categories: ”wet” and ” dry ” coating methods, the crucial difference being the medium in which the deposited material is processed. The former group mainly involves electroplating, electro