In this episode, Danny Mock, managing partner for M10 Process Equipment, Inc., joins co-hosts Heather Allain and Marc Cook to take listeners inside the world of column internals and the fundamentals that drive mass-transfer performance. Danny breaks down what mass-transfer equipment is and how internals efficiency is evaluated, offering practical insight into design considerations that influence reliability and long-term operation. He discusses the importance of selecting materials with appropriate corrosion allowances, how internals are attached and supported, and what engineers should know about bolted fasteners, dissimilar metals, tray flatness, and the risks associated with creep and thermal expansion. The conversation also covers column fires, static charge generation, and the role of random packing in modern column design. Whether you're troubleshooting existing towers or designing new equipment, this episode provides a comprehensive look at the details that matter most inside a process column. This episode is sponsored by Tricor Metals and Webco Industries.   Corrosion Chronicles is produced by Association Briefings.