Perspectives: Making it Work

Plant Combats Corrosion in Idled Boilers

Several measures provide proper protection of off-line steam generators

By Brad Buecker, Kiewit Engineering and Design Co., and Dan Dixon, Lincoln Electric System
Aug 12, 2016

Steam generation plays a critical role at many industrial facilities. Unfortunately, the high-temperature and high-pressure environment of large steam generators makes them susceptible to corrosion. Even seemingly minor impurity ingress can cause problems [1]. Fortunately, plants can take advantage of a lot of lessons learned about preventing corrosion in boilers. However, an often overlooked issue is the risk of severe corrosion occurring during those times when a steam generator is down due to lack of steam demand or for maintenance. This article outlines several techniques for protecting steam generators at these times. Our examples come from a power plant, Lincoln Electric System’s Terry Bundy Generating Station in Lincoln, Nebraska, but the technologies suit process plants as well.

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