火力发电厂的许多金属部件都是在各种介质(蒸汽、水等)和条件下使用的,由于静应力、交变应力和复合应力以及高温高压的作用,所以不少部件,例如,锅炉受热面管子、蒸汽管道、汽轮机叶片、叶轮、螺栓等,都曾发生过应力腐蚀损伤,降低了使用寿命和工作可靠性。应力腐蚀是发生在金属零部件上的一种局部的腐蚀类型,近年来国内外对此种腐蚀 Many of the thermal power plant metal parts are used in a variety of media (steam, water, etc.) and conditions, due to static stress, alternating stress and composite stress and the role of high temperature and pressure, so many components, for example, the boiler heating Surface pipes, steam pipes, steam turbine blades, impellers, bolts, etc., have had stress corrosion damage, reducing the service life and reliability. Stress corrosion is a type of localized corrosion that occurs on metal components. In recent years, this kind of corrosion