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锅炉在运行中或停用时,炉中的介质会使其金属发生腐蚀,从而降低其使用寿命。在锅炉中以氧分子作为去极化剂的腐蚀过程,称为氧去极化腐蚀(即吸氧腐蚀),是自然界中普遍存在而且破坏性较大的一类腐蚀。锅炉系统设备停用期间发生的腐蚀属于氧去极化腐蚀。停炉时氧的浓度大,使锅炉水、汽侧金属表面产生腐蚀,其危害性要比运行时严重。主要原因为:其一,锅炉停用后,水汽系统内部的压力、温度逐渐下降,蒸汽凝结,外界空气就会从设备
When the boiler is in operation or deactivated, the media in the furnace corrodes its metal, reducing its useful life. Oxygen molecules in the boiler as a depolarizer corrosion process, known as oxygen depolarization corrosion (ie, oxygen corrosion), is a pervasive and destructive type of corrosion in nature. Corrosion that occurs during boiler system equipment shutdown is oxygen depolarization corrosion. Shut down the oxygen concentration, the boiler water, steam side of the metal surface corrosion, its harmfulness than the serious operation. The main reasons are as follows: First, after the boiler is disabled, the pressure and temperature inside the water vapor system gradually decrease, and the steam condenses, the air in the outside world will flow from the equipment