Production of silicon-based thermodiffusion layer in tube furnace coil weld after long-term operation Nikita V. Lemeshko, Aleksey V. Rubtsov, Jamshed N. Shermatov, Sergei V. Chertovskikh and Ruslan M. Tazetdinov EPJ Web Conf., 318 (2025) 01007 Published online: 17 February 2025 DOI: 10.1051/epjconf/202531801007