| 摘要 |
A metallic turbine blade (10) has a protective coating (22) applied to the shank (16) and the root (18) of the turbine blade (10). The protective coating (22) comprises a chromized coating (24) diffused into the surface of the metallic article (10) and a glass coating (26) on the chromized coating (24). The glass coating (26) comprises a silicate glass, preferably having a chromium oxide filler. The glass coating (26) preferably comprises a boron titanate silicate glass having a chromium oxide filler. The protective coating (22) provides oxidation and sulphidation resistance for the shank (16) and root (18) of the turbine blade (10).
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