Blast Erosion Properties of Erosion-resistant Thermally Sprayed Coating

Abstract

Blast erosion properties of Plasma sprayed coating, Arc sprayed coatingand PTA layer were assessed by using four kinds of erosion-resistant spraying particles. The results obtained are follows.
(1) Blast erosion property of Plasma sprayed coating is worse than that of SS400 base metal.
(2) Ripple pattern is formed on the eroded area of the surfaces of SS400 base metal and PTA layer. On the other hand, thin sheets are piled up on the eroded area of the surfaces of Plasma and Arc sprayed coating.
(3) The wear mechanism of erosion of PTA layer is thought to be scratch erosion by shear stress of erodent. On the other hand, the mechanism of erosion of Plasma sprayed coating, in which porosities and microcracks are, is thought to be the separation and omission of thin sheets.