Huyen Nguyen Thi Ngoc and Bao Le DucThis email address is being protected from spambots. You need JavaScript enabled to view it.
School of Mechanical Engineering, Hanoi University of Science and Technology, No 1 Dai Co Viet Street, Bach Mai Ward, Hanoi City, 100000 Vietnam
Received: July 12, 2025 Accepted: October 26, 2025 Publication Date: November 22, 2025
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
Electrostatic precipitator (ESP) systems are widely used in thermal power plants to capture hazardous dust generated during fuel combustion, with collection efficiency upto99.9%. However, the shaft–bushing assemblies in the hammer rapping mechanism of ESP operate under harsh conditions (high load, elevated temperature, heavy dust concentration, and no lubrication), leading to rapid wear and the need for frequent maintenance and replacement. This study compares the wear resistance of two commonly used stainless steels, 30X13 and SUS304, in tribo-pair configurations, aiming to identify the more suitable material for industrial application. A shaft–bushing wear testing model was developed, and experiments were designed using the response surface methodology (RSM) with load, temperature, and dust concentration as input factors. The results show that the SUS304–30X13 tribo-pair exhibited about 30% lower total wear and 25% higher service-life-per-cost compared with the 30X13–30X13 pair. The study ensures reliability and provides practical recommendations for selecting bushing materials that are both economical and sustainable under ESP operating conditions.
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