WATERWALL TUBES: WATERSIDE AND FIRESIDE CORROSION: CASE STUDIES

摘要

Boiler tube failures involving fireside corrosion due to low melting point eutectic formation and waterside corrosion due to acid phosphate attack and caustic gouging are discussed. Tubes were examined using scanning electron microscopy/energy dispersive x-ray spectroscopy and metallographic techniques. In addition, corrosion products were examined using x-ray diffraction analysis. Key factors leading to corrosion and failure are provided.