Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：International Journal of Electrochemical Science  

This study investigates the corrosion mechanism of carbon steel beneath zinc-rich coating (ZRC) defects to understand the mutual interference of carbon steel in atmospheric environments. First, electrochemical impedance spectroscopy (EIS) was conducted to determine the self-corrosion behavior of carbon steel under ZRC defects. Subsequently, a macrocell current tests were conducted under immersion and wet–dry environments to evaluate the electrochemical interaction effects at the location of coating defects. The results indicate that the electrochemical interactions between the ZRC defects are influenced by the sacrificial anode effect of Zn. Further, the interaction mechanisms between the steel substrates beneath the organic and inorganic ZRC defects were analyzed. The findings provide deeper insight into the behavior of steel structures in atmospheric environments, offering potential improvements in the design of protective coatings for infrastructure longevity.

DOI： 10.1016/j.ijoes.2024.100860

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：International Journal of Steel Structures  

Temperature significantly affects the galvanic corrosion behavior between carbon fiber reinforced plastic (CFRP) and carbon steel. The corrosion rate of steel components in bridges may increase at high temperatures during summer. To examine the impact of solution temperature on the galvanic corrosion between CFRP and carbon steel, electrochemical tests were conducted at different temperatures. The open circuit potential results and potentiodynamic polarization results indicated that the presence of carbon fiber to carbon steel led to increased potential and accelerated corrosion rates. Subsequently, the temperature-promoting factor was used to predict the corrosion rates of steel with galvanic corrosion based on the Arrhenius equation. Finally, the limitations of the temperature-promotion factor were analyzed theoretically.

DOI： 10.1007/s13296-024-00870-3

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Corrosion Science  

The corrosion interaction mechanism of carbon steel was studied to address the mutual interference of carbon steels under coating defects in the atmospheric environment. The findings revealed that the electrochemical interactions between the carbon steels were primarily influenced by the solution resistance, cathode area, and cathode-to-anode area ratio. In addition, the upper limit of the accelerating effect of the macrocell current on the anodic corrosion rate was determined by theoretical deduction. Finally, the corrosion-accelerating effect of the macrocell current was determined to assess the corrosion rate of carbon steels with electrochemical interactions under defects.

DOI： 10.1016/j.corsci.2023.111730

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1061/JBENF2.BEENG-5955

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Authorship：Lead author   Publisher：Corrosion Science  

Hot-dip galvanized (HDG) and hot-dip aluminized (HDA) steel with different initial coating thicknesses were exposed for 51 years in a coastal marine atmosphere, and their long-term protective performance and degradation mechanisms were evaluated using microstructural characterization, surface analysis, and electrochemical impedance spectroscopy. The results show that HDG coatings with thickness of 62 μm experienced severe depletion. In contrast, no substrate corrosion was observed for HDA specimens with thickness of 40 μm after exposure, and the Fe–Al alloy layer remained largely intact, indicating a significantly longer protective lifetime under the same conditions. Mechanistic analysis suggests that HDG protection is dominated by sacrificial zinc dissolution and corrosion product shielding, whereas HDA relies primarily on the barrier effect of the oxide film. Based on long-term exposure evidence, a four-stage evolution model for coating protective performance is proposed to explain the distinct durability of HDG and HDA under coastal atmospheric conditions.

DOI： 10.1016/j.corsci.2026.114114

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Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Surfaces and Interfaces  

Localized chloride residues are common but difficult-to-detect contaminants during the maintenance of severely corroded steel structures. This study investigates how localized chloride accumulation affects the interfacial corrosion behavior of thermally sprayed Al-5Mg coatings. By controlling contamination area (3–12 mm) and salt load (0–4000 mg/m²), representative scenarios of chloride enrichment were constructed and evaluated through electrochemical measurements, adhesion testing, and cross-sectional microstructural analysis. Results show that localized chloride rapidly induces the formation of continuous oxide bands enriched in Al and Mg at the coating–substrate interface, reducing the initial impedance by more than 80% compared with uncontaminated conditions. Interfacial adhesion strength decreases significantly, with the 4000 mg/m² condition exhibiting an average reduction of approximately 33%. At high contamination levels, accumulated oxide products hinder ionic transport, leading to an apparent one-order-of-magnitude increase in impedance and a corresponding decrease in corrosion current, thereby giving a misleading impression of improved corrosion resistance. Despite this electrochemical false improvement, interfacial corrosion is more severe in these regions. Furthermore, when contamination area and salt load are combined into a single parameter—total contamination—a clear nonlinear relationship emerges between total contamination and interfacial degradation, indicating that even small contaminated zones with high salt concentration can dominate failure. These findings clarify the critical role of localized chloride enrichment in initiating and accelerating interfacial failure of thermal spray coatings and highlight the risk of misinterpreting coating performance when relying solely on electrochemical indicators in field inspections.

DOI： 10.1016/j.surfin.2026.108547

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Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Journal of Physics Conference Series  

For painted steel structures, coatings can deteriorate due to factors like ultraviolet radiation, water accumulation, and salt exposure, thereby leading to corrosion. This kind of corrosion tends to originate not only from isolated coating defects but also from multiple adjacent defects. Previous research by the author's group demonstrated that the presence of adjacent defects can amplify corrosion on steel substrates. However, the precise interaction mechanism between these adjacent defects remains unclear. In this study, circular defects of varying sizes were created on coated steel electrodes to simulate coating defects. The macrocell currents between these defects were measured in an immersion environment using a zero-resistance ammeter (ZRA). The results indicated that when environmental conditions lead to stable anodic and cathodic regions at the defect sites, the anodic corrosion rate increased, while corrosion at the cathodic site was inhibited due to cathodic protection from the anode. Furthermore, when the electrode at a smaller defect became cathodic, the increased protection current density may even prevent any corrosion at that site.

DOI： 10.1088/1742-6596/3021/1/012074

Scopus

Language：English   Publisher：Japan Society of Corrosion Engineering  

<p>This study investigated the impact of NaCl concentration on the electrochemical performance of one kind of commercial Mg-Mn alloy （M1C）. Firstly, potentiodynamic polarization （PDP） tests were conducted to determine corrosion behavior of M1C in NaCl solutions with concentrations of 0.1 mass％, 0.5 mass％, 3.5 mass％, and 10.0 mass％. Additionally, electrochemical impedance spectroscopy （EIS） tests were performed to analyze the oxide film thickness across varying solution concentrations. The PDP results indicated that the corrosion rate of M1C increased with the increase of solution concentration. Furthermore, breakdown potential was observed in anodic polarization curves when the concentration of NaCl solution was over 0.5 mass ％. The EIS results showed that after 24h immersion, thickness of MgO film decreased with increasing NaCl concentration and then stabilized.</p>

DOI： 10.3323/jcorr.73.230

CiNii Research

Language：Japanese   Publisher：Japan Society of Civil Engineers  

<p> The bond behavior between steel member and carbon fiber sheet is subject to variations based on construction conditions, such as surface preparation methods and curing temperatures. However, there exists considerable uncertainty regarding how these conditions affect the bonding characteristics of carbon fiber sheets, thereby posing challenges in determining the optimal design and construction parameters for reinforcement methods. This study conducted a comparative analysis of four surface treatment methods to assess their effects on the surface properties and adhesive properties of steel substrates. It was also examined the shear strength between steel plates and composite materials. Besides, the study delved into aspects such as the hardening rate, mechanical properties, thermal properties, and fiber penetration of the impregnation resin under different environmental temperatures. Furthermore, an initial isothermal curing model of epoxy resin was constructed, while the vitrification process related to thermal history was speculated. The enhancement brought by the post-curing process on the diverse material properties of epoxy resin was evaluated. The insights of this study have the potential to significantly enhance the bond performance of steel members strengthened with CFRP materials.</p>

DOI： 10.2208/jscejj.23-00250

CiNii Research

Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Transportation Research Record  

The deterioration of a concrete deck damaged by repeated traffic loads could directly affect its performance. Two full-scale specimens modified from a precast, prestressed concrete (PC) deck slab on a 12.65-m-wide composite bridge with twin I-girders spaced at 7.05 m were tested to study the degradation of mechanical performance of the slabs under fatigue loading. The depth of the slabs was 30 cm at the midspan and 40 cm at the two supports. One specimen was 3.0 m wide and conducted a three-stage fatigue loading before the static destructive loading, the other was 1.5 m wide and performed a static load test to failure only. The ultimate strength of specimens was obtained, and the variation of deflection, reinforcing strain, and cracks were discussed. The test results showed that the failure mode of the PC slabs was flexure subjected to static load. Fatigue loading significantly degenerated the stiffness of the slab, and the maximum stiffness reduction was about 35:2%. The distribution scale of cracks was expanded about twice as much at the same load level under the fatigue loading. It could be deduced that the fatigue loading could enlarge the crack width, by comparing the measured results of concrete crack widths of the two specimens, however, the design provisions did not take this into account. A comparison between the transformed flexural capacity of the two specimens showed the residual flexural capacity was reduced by 7:8%. Moreover, an analysis model was developed to predict the residual flexural capacity of PC slabs.

DOI： 10.1177/03611981221116625

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