PSI - Issue 71

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 71 (2025) 196–202

5 th International Structural Integrity Conference & Exhibition (SICE 2024) Monitoring of Corrosion on Mild Steel Coupon using Piezo Impedance based Structural Health Monitoring (PISHM): A Periodical Study of Experimental Mass Loss and Coupled Finite Element Analysis

Ajay Patel a,* and Sumedha Moharana a a Shiv Nadar Institution of Eminence, Delhi-NCR, 201314, India

SHM is critical for assessing the structural integrity and safety of infrastructure system. This involves the use of advanced sensor technologies, advanced diagnostic algorithms, and other computational approaches to monitor the condition of structures in real time or on demand. SHM applications span the aerospace, civil, and mechanical engineering domains, offering benefits such as improved safety, performance, and reduced life-cycle costs (Ikeda T. (1990); Bhalla (2001)). The use of piezoelectric materials as sensors, owing to their dual sensing capabilities, is a major advantage in SHM technology (Ikeda T. (1990)). In conclusion, SHM is a multifaceted technology, with a broad spectrum of applications and continuous advancements. Keywords: Electromechanical Impedance (EMI) Technique; Piezo-Structural Interaction; Finite Element Method (FEM); Structural Health Monitoring (SHM); Coupled Field Analysis (CFA) © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SICE 2024 organizers This study examined the impact of corrosion on a mild steel coupon exposed to corrosion environment. This research combines experimental and numerical simulation methods to assess the effects of corrosion, focusing on the mass loss and performance of the lead zirconate titanate (PZT) sensor. Experimentally, the steel bar was subjected to corrosive conditions, that is 3.5% sodium chloride (NaCl), and the weight loss due to corrosion was measured at regular intervals. These weight loss data were then used to simulate the same corrosion effects numerically, analysing the influence on the signatures (i.e. conductance and susceptance) extracted from PZT patches. Numerical simulations were conducted using finite element modelling to replicate the corrosion process and its impact on the response of the PZT patch. The simulated signatures were compared with the baseline data using root mean square deviation (RMSD) values to evaluate the accuracy and reliability of the PZT patch for detecting corrosion-induced changes in the steel coupon. By correlating the experimental weight loss measurements with the numerical PZT sensor data, this study aimed to validate the effectiveness of PZT patches for real-time corrosion monitoring. Abstract 1.1 Structural Health Monitoring (SHM) 1. Introduction

1.2 Electro-mechanical Impedance (EMI) Technique

* Corresponding author: Email address: ap184@snu.edu.in

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SICE 2024 organizers 10.1016/j.prostr.2025.08.027