| 摘要 |
<p>A coating system and process capable of providing erosion and corrosion-resistance to a component (18), particularly a steel compressor blade of an industrial gas turbine. The coating system includes a metallic sacrificial undercoat (12) on a surface of the component substrate (16), and a ceramic topcoat (14) deposited by thermal spray on the undercoat (12). The undercoat (12) contains a metal or metal alloy that is more active in the galvanic series than iron, and electrically contacts the surface of the substrate. The ceramic topcoat (14) consists essentially of a ceramic material chosen from the group consisting of mixtures of alumina and titania, mixtures of chromia and silica, mixtures of chromia and titania, mixtures of chromia, silica, and titania, and mixtures of zirconia, titania, and yttria.</p> |
