| 摘要 |
PURPOSE:To aim at improvements in corrosion resistance ever so better, by installing a covering layer consisting of an anticorrosion material in and around the root of an extendedly installed part at the side of a steam outlet of an outer ring nozzle diaphragm. CONSTITUTION:A circumferential extendedly installed part 10 covering a blade tip part 7 is installed at the side of a steam outlet of an outer ring diaphragm 1, and a covering layer 20 consisting of an anticorrosion material is formed in and around the root of this extendedly installed part 10. With this constitution, even if an oxide scale is stayed and swirled an and around the root of the extendedly installed part 10, a degree of corrosional speed is considerably delayable, thus corrosion resistance is improvable. |
