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由于冷却水的作用,热电厂冷凝器黄铜管常发生不同程度的腐蚀,导致黄铜管泄漏甚至破裂.这不仅大大缩短了黄铜管的使用寿命,造成了经济损失;更为严重的是因为冷凝器泄漏而污染了锅炉水质,直至整个发电机组停止运行.因此,采取有效的措施阻止黄铜管的腐蚀,保证设备的安全运行,是发电厂金属腐蚀与防护工作中的一个重要课题. 目前,国内外电厂均采用冷却水中添加硫酸亚铁处理,使铜管表面生成一层水合氧化铁(γ-FeOOH)的保护膜层,从而可降低黄铜管的腐蚀速度,延长其使用寿命.国内在七十年代对成膜的各种条件如溶液中Fe~(++)浓度、溶液的pH值、温度、流速等进行了大量研究工作,并相继在现场使用
Due to the effect of cooling water, the brass tube of the condenser of the power plant often corrodes to some extent, causing the brass tube to leak or even rupture, which not only shortens the service life of the brass tube, but also causes economic losses; more serious is because The condenser leaks and pollutes the boiler water quality until the entire generator set stops running.Therefore, taking effective measures to prevent the corrosion of the brass tube and ensure the safe operation of the equipment is an important issue in the metal corrosion and protection of the power plant. , Domestic and foreign power plants are used to add cooling water ferrous sulfate treatment, the copper surface to generate a layer of hydrated iron oxide (γ-FeOOH) protective film, which can reduce the brass tube corrosion rate and prolong its service life. In the seventies of a variety of film-forming conditions such as Fe ~ (++) concentration in solution, solution pH, temperature, flow rate, a lot of research work, and have been in the field