Effect of chloride concentration on the properties of passive film formed on Q235 steel in simulated concrete pore solutions

Liu, Lupeng; Li, Senlin; Gao, Zhiming; Jia, Hailiang; Hu, Wenbin

doi:10.1108/acmm-04-2022-2646

Cited by 4 publications

(4 citation statements)

References 28 publications

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“…All Nyquist curves exhibit a single semicircle at the high frequencies, and the semicircle diameter of Ni-Cr coatings are much higher than that of pure Ni and NAB alloy. Moreover, the semicircle diameter increases obviously with the gradual increase of Cr content in Ni-Cr coatings, indicating that the electrical impedance of Ni-10.4%Cr coating are the highest among the studied samples, as the semicircle is associated with the resistance of charge–transfer reaction at the coating/solution interface (Liu et al , 2023). The comparison of Bode-impedance plot [Figure 8(b)] shows the highest Z module for Ni-10.4%Cr coating, suggesting its highest corrosion resistance.…”

Section: Resultsmentioning

confidence: 99%

Characterization and corrosion behavior of Ni-Cr coatings by using pulse current electrodeposition

Zhu

Gu²,

Wang

et al. 2023

ACMM

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Purpose The purpose of this paper is to study the effect of chromium content on the microstructure and corrosion resistance of Ni-Cr coating. Design/methodology/approach Ni-Cr coating was prepared by pulse current electrodeposition with trivalent chromium. On the basis of studying effect of electroplating parameters on composition and morphology, Ni-Cr alloy coatings with various chromium contents were obtained. The microstructure was characterized by scanning electron microscopy, X-ray diffractometer and transmission electron microscopy. Corrosion behavior was studied by potentiodynamic polarization and electrochemical impedance spectroscopy techniques. Findings Electrodeposited chromium was solidly dissolved in nickel and refined the grain of the coating. With the increase of Cr content, the corrosion resistance of Ni-Cr coating was enhanced, which is due to the formation of continuous nickel hydroxide and compact chromium oxide passive films. Originality/value Ni-Cr alloy coating without penetration crack was prepared in trivalent chromium electrolyte, and the mechanism of its excellent corrosion resistance was proposed.

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Section: Resultsmentioning

confidence: 99%

Characterization and corrosion behavior of Ni-Cr coatings by using pulse current electrodeposition

Zhu

Gu²,

Wang

et al. 2023

ACMM

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“…As can be seen from the Bode plot in Figure 6(b), the | Z | and F in the frequency range of 10 −1 to 10 2 Hz is linear dependent, and the slope is less than 1. The maximum value of the phase angle indicates the capacitive nature of the passivation film (Luo et al , 2018; Song et al , 1994; Liu et al , 2023). Furthermore, only a one-time constant is observed in the Bode plot, so the Nyquist plot should contain a capacitive loop.…”

Section: Resultsmentioning

confidence: 99%

Influence of microstructure of CoCrNi medium entropy alloy on its corrosion behavior

Shi,

Ling,

Kuang

et al. 2023

ACMM

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Purpose The purpose of this paper is to reveal the effect of microstructure on the corrosion behavior of CoCrNi alloy in 3.5 Wt.% NaCl solution. Design/methodology/approach The as-cast CoCrNi alloy was prepared by arc melting, and the cold-rolled and annealed alloys were prepared by processing the as-cast alloy. Findings The experimental results showed that a protective passivation film was formed on the surfaces of these CoCrNi MEA, and the stability and compactness of alloys increased in the sequence of cold-rolled, as-cast and annealed CoCrNi alloys. The annealed CoCrNi alloys had the best pitting resistance. Originality/value This study proposes the effect of the microstructure of CoCrNi alloy on corrosion resistance.

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“…Wang et al (2023) investigated the intergranular corrosion susceptibility of a nitrogen-containing austenitic stainless steel QN2109. Liu et al (2023) studied the effect of chloride concentration on the properties of passive film formed on Q235 steel. Qin et al (2023) studied the method for improving the corrosion resistance of stainless steel bipolar plates.…”

Section: Introductionmentioning

confidence: 99%

Equivalent conversion investigation of environmental corrosion of suspenders in long-span suspension bridge

Yuan,

Wang,

et al. 2023

ACMM

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Purpose This paper aims to investigate the equivalent relationship between accelerated corrosion tests and real environmental spectrum of suspenders in long-span suspension bridge considering multiple factors action. Design/methodology/approach Based on Faraday's law, corrosion current was used as a measure of metal corrosion, and the equivalent conversion relationship between laboratory environment and real service environment was established. The equivalent conversion method for bridge structural steel had been determined under different temperature, humidity, pH value and NaCl concentration conditions. The compilation of environmental spectra for large span bridges considering multiple factors and the principle of equivalent conversion have been proposed. Findings Environmental factors, including temperature, humidity, pH value and NaCl concentration, have significant impact on the corrosion degree of suspension steel wires, and only considering these two factors for equivalent conversion cannot accurately reflect the true service environment of the bridge. The 33.8-h salt spray accelerated corrosion test using the standard conditions can be equivalent to one year of suspenders corrosion in a real service environment. Originality/value The equivalent accelerated corrosion method for steel wires proposed in this study can effectively predict the corrosion degree of the suspenders, which has been verified to be correct and can provide theoretical guidance for the development of corrosion test plans for steel wires and engineering technical basis for anti-corrosion control and calendar life research of suspension bridge suspenders.

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Effect of chloride concentration on the properties of passive film formed on Q235 steel in simulated concrete pore solutions

Cited by 4 publications

References 28 publications

Characterization and corrosion behavior of Ni-Cr coatings by using pulse current electrodeposition

Characterization and corrosion behavior of Ni-Cr coatings by using pulse current electrodeposition

Influence of microstructure of CoCrNi medium entropy alloy on its corrosion behavior

Equivalent conversion investigation of environmental corrosion of suspenders in long-span suspension bridge

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