What prevents the buildup of corrosion in economizers and air preheaters?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

The prevention of corrosion buildup in economizers and air preheaters primarily relies on effective feedwater treatment. Corrosion in these components often arises from dissolved gases, such as oxygen and carbon dioxide, as well as other impurities in the water used for steam generation. When these contaminants are present, they can react with the metal surfaces of economizers and air preheaters, leading to corrosion and ultimately damage.

Effective feedwater treatment involves processes designed to remove or neutralize these harmful substances before they enter the system. This treatment may include the use of chemicals such as oxygen scavengers for oxygen removal, pH control agents, and methods for reducing the concentration of contaminants. By ensuring that the water is properly treated, the likelihood of corrosion is significantly reduced, allowing for more efficient operation and longer equipment lifespan.

While higher temperature operation can help mitigate certain forms of corrosion (such as those caused by condensation), it’s not as comprehensive a solution as proper feedwater treatment. Regular maintenance is essential for identifying and addressing corrosion as it occurs, but it does not prevent it outright. Increased pressure settings can enhance thermal efficiency but do not directly address the causes of corrosion in the system. Therefore, the most effective way to prevent corrosion buildup is through diligent and effective treatment of

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