Study on Pitting Corrosion Simulation of Steel Plates Based on Cellular Automaton-Finite Element Coupling
Shizhong Liu, Wei Zhang
TL;DR
This study develops a model to simulate pitting corrosion in steel plates under harsh environmental conditions using a combination of experiments and simulations.
Contribution
The novel CAFE model integrates cellular automata and finite element analysis to simulate pitting corrosion under multi-field coupling conditions.
Findings
The CAFE model effectively captures pitting corrosion initiation and evolution under varying temperature and salinity.
Localized plastic deformation significantly accelerates pit propagation under current-driving conditions.
The model shows strong agreement between numerical predictions and experimental results.
Abstract
Pitting corrosion is a prevalent and highly detrimental form of localized corrosion, which can severely compromise the local load-bearing capacity of metallic materials and, in extreme cases, trigger structural failure. In response to the pronounced susceptibility of Q235 galvanized steel plates to localized pitting under the extreme service conditions of the South China Sea—characterized by high temperature, high salinity, high humidity, and coupled chemical corrosive effects—this study conducts a systematic investigation combining experimental characterization and numerical simulation. First, a novel accelerated pitting corrosion apparatus was designed and developed, and chloride ion cyclic corrosion (CICC) tests were performed on Q235 galvanized steel plates. The morphology and temporal evolution of pitting damage were comprehensively characterized. Subsequently, based on a coupled…
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Taxonomy
TopicsStructural Integrity and Reliability Analysis · Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition