Evaluation and Optimal Design of Metal Indoor Corrosion Tests Based on Equivalence Degree of Corrosion Mechanism

• Published in: The proceedings of ... International Conference on Reliability, Maintainability and Safety pp. 501 - 507
• Main Authors: Ji, Haodi, Ma, Xiaobing, Cai, Yikun, Wang, Han
• Format: Conference Proceeding
• Language: English
• Published: IEEE 26.08.2023
• Subjects: Adaptation models; Corrosion; Corrosion mechanism equivalence; Design methodology; Dynamic link function; Experimental methods; Indoor corrosion test; Life estimation; Optimization; Probability distribution; Reliability engineering; Safety; Stress; Test optimization and design; Testing
• ISSN: 2575-2642
• DOI: 10.1109/ICRMS59672.2023.00095

The prevalent indoor corrosion test design methods commonly overlook the impact of environmental stress levels on the equivalence of corrosion mechanisms. Therefore, this paper proposes a novel indoor corrosion test design method based on corrosion mechanism equivalence, with the aim of enhancing the precision of simulating accelerated corrosion environments indoors. This enhancement is achieved by aligning the degradation mechanisms observed during material corrosion processes with those experienced in authentic environmental settings. To operationalize this approach, we introduce the concept of corrosion mechanism equivalence, quantified as the corrosion mechanism equivalence degree (CMed). Subsequently, we adapt conventional link function models to account for the probability distribution of environmental factors, thus facilitating accurate estimation of corrosion model parameters. Lastly, we formulate an optimization problem for accelerated corrosion testing based on CMed, incorporating constraints pertaining to environmental stress levels and acceleration factors. Illustrating the efficacy of this method is a real-world example, which demonstrates its ability to accurately simulate the actual material service environment. This is achieved by determining stress levels within indoor accelerated corrosion environments, all while ensuring the attainment of prescribed acceleration factors and corrosion mechanism equivalence.