Electrochemical corrosion behavior of hot-rolled steel under oxide scale in chloride solution

Dong, Chaofang; Xue, H.B.; Li, Yong; Qi, Hui-bin; Cheng, Y. Frank

doi:10.1016/j.electacta.2009.02.080

Cited by 19 publications

(5 citation statements)

References 11 publications

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“…The corrosion current is proportion to and increases with increasing porosity of the oxide scale. Hence, the porosity of oxide scale could be expressed as follows [16]:…”

Section: Porosity Of Oxide Scalementioning

confidence: 99%

“…Based on the quantitative analysis of chemical reactions in the corrosion process, an atmospheric corrosion model for steel was established, and the formation conditions of a corrosion resistant rust layer were established. Dong [16] et al applied EIS and surface characterization to examine the electrochemical corrosion behavior of hot rolled steel strip in 1% NaCl solution. The results showed that the corrosion of the steel matrix would be slowed by the dense oxide scale.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Sun

Liu

et al. 2021

Coatings

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The atmospheric corrosion behavior of a hot-rolled strip with four types (I–IV) of oxide scale was investigated using the accelerated wet–dry cycle corrosion test. Corrosion resistance and porosity of oxide scale were studied by potentiometric polarization measurements. Characterization of samples after 80 cycles of the wet–dry corrosion test showed that scale comprised wüstite and magnetite had strongest corrosion resistance. Oxide scale composed of inner magnetite/iron (>70%) and an outer magnetite layer had the weakest corrosion resistance. The corrosion kinetics (weight gain) of each type of oxide scale followed an initial linear and then parabolic (at middle to late corrosion) relationship. This could be predicted by a simple kinetic model which showed good agreement with the experimental results. Analysis of the potentiometric polarization curves, obtained from oxide coated steel electrodes, revealed that the type I oxide scale had the highest porosity, and the corrosion mechanism resulted from the joint effects of electrochemical behavior and the porosity of the oxide scale. In the initial stage of corrosion, the corrosion product nucleated and an outer rust layer formed. As the thickness of outer rust layer increased, the corrosion product developed on the scale defects. An inner rust layer then formed in the localized pits as crack growth of the scale. This attacked the scale and expanded into the substrate during the later stage of corrosion. At this stage, the protective effect of the oxide scale was lost.

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“…The corrosion current is proportion to and increases with increasing porosity of the oxide scale. Hence, the porosity of oxide scale could be expressed as follows [16]:…”

Section: Porosity Of Oxide Scalementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Sun

Liu

et al. 2021

Coatings

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“…Collazo A et al [2] found that the presence of dense iron oxide slowed the corrosion rate of the steel plate substrate. Dong C F et al [3] investigated the electrochemical corrosion behaviour of hot rolled steel with iron oxide in NaCl solution by EIS, dynamic potential polarisation and surface characterisation. The results show that the dense iron oxide skin protects the underlying steel from corrosion.…”

Section: Introductionmentioning

confidence: 99%

Effect of controlled cooling process on the atmospheric corrosion behaviour of HRB400E hot rolled rebar

Qian¹,

Bao²,

Zhang³

et al. 2022

Mater. Res. Express

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To address the problem of rusting of reinforcing bars that occurs in industry, the aim is to control the denseness of the iron oxide skin by changing the controlled cooling process without increasing the production cost, thereby improving the corrosion resistance of the bars. In this paper, the effect of different cooling control processes on the industrial atmospheric corrosion behaviour of HRB400E hot-rolled rebar was investigated using alternating wet and dry corrosion tests. The morphology and structure of iron oxide on the surface and cross-section of the rebar were observed using scanning electron microscopy (SEM) and field emission electron probe microanalysis (EPMA); the corrosion products and electrochemical behaviour of the specimens after alternating wet and dry tests were compared using X-ray diffraction analysis (XRD) and electrochemical methods. The results showed that the hot-rolled rebar without controlled cooling had a dense surface, a thicker iron oxide skin and a tighter bond between the iron oxide skin and the substrate; the corrosion rate of the hot-rolled rebar without controlled cooling was less than that of the rebar with controlled cooling in the alternating wet and dry corrosion tests; the corrosion products mainly consisted of α-FeOOH, γ-FeOOH and Fe3O4; the self-corrosion potential and rust layer resistance of the hot rolled rebar without controlled cooling after rolling are higher than those of the controlled cooling bars, showing good corrosion resistance.

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“…Dong et al [13] studied the electrochemical corrosion behavior of hot-rolled steel in NaCl solution and found that the dense oxide scale could protect the steel. Cheng et al [14] analyzed the different corrosion behaviors ofB510L hot-rolled steel with and without oxide scale, they demonstrated that the steel with oxide scale had a higher corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

The corrosion behavior of weathering bridge steel with oxide scale in different corrosion environments

Song¹,

Guo²,

Zhang³

et al. 2020

Surf. Topogr.: Metrol. Prop.

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The corrosion behavior of Q345 weathering bridge steel (Q345WS) with oxide scale in simulated different environments was investigated by corrosion kinetics, SEM, XRD and polarization curves. The results demonstrate that the corrosion behavior of Q345WS in three wet-dry cyclic environments are influenced by oxide scale. The corrosion tendency of Q345WS with oxide scale is V-shaped curve due to the formation of loose rust layer in simulated deicing salt and mixed environments, while that of Q345WS in stimulated industrial environment is divided into two different linear stages. The main role of oxide scale is similar in different environments, which has a protective effect in the early stage of all corrosion. Nevertheless, potential difference is easy to be caused in the middle of corrosion, and it has little effect on the later period.

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Electrochemical corrosion behavior of hot-rolled steel under oxide scale in chloride solution

Cited by 19 publications

References 11 publications

Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Effect of controlled cooling process on the atmospheric corrosion behaviour of HRB400E hot rolled rebar

The corrosion behavior of weathering bridge steel with oxide scale in different corrosion environments

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