SECM Study of Effect of Chromium Content on the Localized Corrosion Behavior of Low-Alloy Steels in Chloride Environment

Karuppusamy, Indira; Nishimura, Toshiyasu

doi:10.1007/s11665-016-2280-4

Cited by 17 publications

(4 citation statements)

References 47 publications

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“…Fe (OH)2 is further oxidized to Fe(OH)3 and lepidocrocite γ-FeOOH during thin film drying of the electrolyte. Part of the γ-FeOOH is converted to stable goethite α-FeOOH, and the other part reacts with Fe 2+ to form Fe3O4 due to the instability of the γ-FeOOH [30]. The higher α-FeOOH content in the rust layer makes the rust layer of GR65 steel denser, resulting in Cl − blocking and enrichment outside the rust layer.…”

Section: Anticorrosion Mechanismmentioning

confidence: 99%

Corrosion resistance behavior of weathering GR65 steel under marine and industrial atmospheric environment

Liu,

Gao,

Wang

et al. 2024

Second International Conference on Electrical, Electronics, and Information Engineering (EEIE 2023)

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This paper focused on the corrosion resistance of weathering GR65 steel under marine and industrial atmospheric environments, the weight loss method and Tafel method were respectively used to judge the anticorrosion mechanism. The corrosion resistance of Q345 steel, which has been commonly used in transmission towers and steel factory buildings, was also investigated for comparison. The 3.5%NaCl solution and 3.5%Na2SO4 solution were respectively adopted to simulate the marine and industrial atmospheric environment, and the corrosion resistance of GR65 and Q345 steel in these two types of solution were carefully discussed and compared. The results show that GR65 and Q345 are more prone to corrosion in 3.5%NaCl solution than in 3.5%Na2SO4 solution, Specifically, the corrosion rate of GR65 is about 51% and 52.7% lower than that of Q345 respectively in 3.5%NaCl and 3.5%Na2SO4 solution. The rust layer on the surface of Q345 steel is poor in continuity, loose-porous, and easy to peel, which fails to prevent the rust layer from continuing to develop inward. Comparatively, the rust layer of GR65 surface exhibits good density, continuity, and strong adhesion, which is helpful in slowing down the further development of the rust. Thus, the GR65 shows better corrosion resistance than Q345 steel.

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Section: Anticorrosion Mechanismmentioning

confidence: 99%

Corrosion resistance behavior of weathering GR65 steel under marine and industrial atmospheric environment

Liu,

Gao,

Wang

et al. 2024

Second International Conference on Electrical, Electronics, and Information Engineering (EEIE 2023)

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“…Research [4,[8][9][10] has shown that the addition of trace amounts of chromium can increase the steel's corrosion potential, facilitating the densification of corrosion product films, and promote the formation of protective corrosion products, thereby enhancing the steel's resistance to uniform corrosion. However, with the continuous increase in chromium content, in environments with high chloride ion concentrations, the chromium content can accelerate the hydrolysis reactions of Cr 3+ and Fe 3+ , leading to a decrease in pH at the rust layer/matrix interface, making localized corrosion of the steel more pronounced [8,[11][12][13]. To address this issue, there is a growing focus on the microalloying of chromium-containing steel to improve its corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo on the Corrosion Resistance of Cr-Containing Steel in a Simulated Tropical Marine Atmospheric Environment

Wang,

Gao,

2024

Crystals

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In this manuscript, the effect of Mo addition on the corrosion resistance of the low-alloy steel in a simulated tropical marine atmospheric environment has been studied through microstructure characterization, corrosion immersion experiments, electrochemical measurement, and a series of microscopic characterization methods. The results show that Mo has the ability to reduce the corrosion rate of low-alloy steel in a marine atmospheric environment, with a more pronounced reduction effect observed over longer corrosion periods. The addition of Mo enhances the corrosion product film’s compactness when coupled with Cr, subsequently improving corrosion resistance. Simultaneously, MoO42−, acting as a slow-release ion, can effectively suppress localized corrosion in low-alloy steel. The research findings can offer data support and a theoretical foundation for the design of low-alloy steels with enhanced corrosion resistance in a tropical marine atmospheric environment.

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“…The chromium carbide particles formed by Cr in steel are relatively small and evenly distributed. The addition of Cr makes steel stronger and harder, and Cr can also improve the corrosion resistance of the steel [18,19]. Generally speaking, the role of strong carbide-forming elements, Ti, Nb, and V, is to refine the grains and strengthen the precipitation of phases [20,21].…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment process on precipitation of V microalloyed steel

Xun

Zhang

et al. 2022

Ironmaking & Steelmaking

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Controlled rolling and controlled cooling processes achieve high-strength alloys due to their combined effects on the grain refinement, dispersion, and phase transformations. This paper studies the dissolution of V in austenite by normalizing treatments. The samples were then annealed to form uniform, fine, and dispersed V-based precipitates which in turn facilitated subsequent phase transitions in the steel. The results showed that V fully dissolved into austenite when the steel was treated. Besides, when the steel was annealed, V precipitated in the form of V (C, N), and the V(C, N) precipitates promoted the formation of ferrite. At the same time, fine pearlite phases also formed, and the V(C, N) precipitates were distributed among the pearlite lamellae. The uniformly dispersed V(C, N) precipitates further regulated the microphase organization, refined the grains, and acted as the microalloying element, making the steel more uniform, and improving the mechanical properties of the steel.

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SECM Study of Effect of Chromium Content on the Localized Corrosion Behavior of Low-Alloy Steels in Chloride Environment

Cited by 17 publications

References 47 publications

Corrosion resistance behavior of weathering GR65 steel under marine and industrial atmospheric environment

Corrosion resistance behavior of weathering GR65 steel under marine and industrial atmospheric environment

Effect of Mo on the Corrosion Resistance of Cr-Containing Steel in a Simulated Tropical Marine Atmospheric Environment

Effect of heat treatment process on precipitation of V microalloyed steel

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