Thermal spraying technology is a surface protection and surface strengthening technology. In recent years, the development is very rapid. Its coating has excellent properties such as corrosion resistance, wear resistance or heat insulation, which is widely used in aerospace, machinery manufacturing, petrochemical, automotive and other fields. Plasma spraying technology is one of the thermal spraying technologies, which is based on plasma arc as heat source. Plasma arc is a kind of high density heat source. The arc is compressed and concentrated in the plasma spray gun.
Plasma spraying has the following three main characteristics: first, there is no deformation of the workpiece, does not change the properties of the matrix metal after heat treatment; Second, there are many kinds of coating, because of the high temperature of the flame flow, various spraying materials can be heated to the melting state, so that you can get various properties of coating; Third, the process is stable and the coating quality is high. Plasma spraying technology is an effective method to prepare anticorrosive coatings on gas turbine blades.