Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2018;7:371-5 DOI: 10.1016/j.jmrt.2018.06.007
Original Article
Development of a magnetic sensor for detection of moderate carburization damages in heat-resistant HP-Nb tubes of steam reforming furnaces
Juan E.C. Lopeza,b, Mónica P. Arenasa,b,, , Clara J. Pachecob, Fábio S. Queiroza, Carlos B. Ecksteinc, Laudemiro Nogueirac, Luiz H. de Almeidaa, João M.A. Rebelloa, Gabriela R. Pereiraa,b
a Department of Metallurgical and Materials Engineering – Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
b Laboratory of Nondestructive Testing, Corrosion and Welding (LNDC/COPPE) – Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
c Petrobras, Rio de Janeiro, Brazil
Received 20 November 2017, Accepted 10 June 2018
Abstract

Although carburization is not a typical occurrence in steam reforming furnaces, this localized damage can occur and its detection is an important issue. A magnetic sensor based in the magnetic flux density variation has been proposed for the carburization detection in samples coming from steam reformer tubes. A three-dimensional model, by finite-element method (FEM), supported the optimization and development of a magnetic sensor for the detection of carburized samples. The experimental results indicated that the developed sensor, with high sensitivity, allowed to detect regions with moderate carburization damages.

Keywords
Carburization, Steam Reformer tubes, FEM simulation, Magnetic sensor
J Mater Res Technol 2018;7:371-5 DOI: 10.1016/j.jmrt.2018.06.007
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