Corrosion resistance and corrosion interface characteristics of Cr-alloyed rebar based on accelerated corrosion testing with impressed current

Li, Weilin; Wang, Qiuyue; Hao, Jun; Zou, Gongnian; Zhang, Ping; Wang, Guowei; Ai, Zhiyong; Chen, Huande; Ma, Han; Song, Dandan

doi:10.1016/j.jmrt.2022.12.136

Cited by 18 publications

(3 citation statements)

References 64 publications

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“…The XPS spectra of Cr 2p3/2 and Fe 2p3/2 in the passive film of Fe-19Cr-15Mn-0.66 N surface after 1 h CE in 0.5 mol l −1 NaCl solution are shown in figure 7. In the passive film, the element Cr usually exists in the form of +3 valence state in Cr 2 O 3 and/or Cr(OH) 3 [31,37]. However, a small amount of Cr-met is also present in the passive film.…”

Section: Resultsmentioning

confidence: 99%

Cavitation erosion-corrosion behaviour of Fe-19Cr-15Mn-0.66 N high nitrogen austenitic stainless steel in sodium chloride solution

Qiao

Zhou

et al. 2023

Phys. Scr.

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The cavitation erosion behaviors of Fe-19Cr-15Mn-0.66N high nitrogen austenite stainless steel in distilled water and 0.5 mol/L NaCl were investigated by conducting mass loss and electrochemical measurements. The mass loss of HNSS after CE for 8 h in 0.5 mol/L NaCl solution is 1.15 times of that in the distilled water. The magnitude of impedance decreased within 5 h and then leveled off with a slow decrease. Cavitation erosion has a significant effect on the composition of the passive film, resulting in a notable increase in the Cr2O3 and Fe2O3.

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Section: Resultsmentioning

confidence: 99%

Cavitation erosion-corrosion behaviour of Fe-19Cr-15Mn-0.66 N high nitrogen austenitic stainless steel in sodium chloride solution

Qiao

Zhou

et al. 2023

Phys. Scr.

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“…The Nyquist plot displays the real impedance against imaginary impedance for pure LFAOIH-PU 35 and GO dispersed LFAOIH@GO 0.5 -PU 35 after 1, 3, 6, 9, and 12 days of immersion. The corrosion rate is discernible from the size of the Nyquist plot, where a larger diameter corresponds to a slower corrosion rate or a heightened resistance to corrosive ions [31]. In the case of both LFAOIH-PU 35 and LFAOIH@GO 0.5 -PU 35 coatings, an initial phase featuring a linear trend was noted on the first day of exposure.…”

Section: Anticorrosion Study Electrochemical Impedance Spectroscopic ...mentioning

confidence: 99%

Advanced Anticorrosive Graphene Oxide-Doped Organic-Inorganic Hybrid Nanocomposite Coating Derived from Leucaena leucocephala Oil

Al-otaibi,

Alandis,

Al-Mohammad

et al. 2023

Polymers

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Metal corrosion poses a substantial economic challenge in a technologically advanced world. In this study, novel environmentally friendly anticorrosive graphene oxide (GO)-doped organic-inorganic hybrid polyurethane (LFAOIH@GO-PU) nanocomposite coatings were developed from Leucaena leucocephala oil (LLO). The formulation was produced by the amidation reaction of LLO to form diol fatty amide followed by the reaction of tetraethoxysilane (TEOS) and a dispersion of GOx (X = 0.25, 0.50, and 0.75 wt%) along with the reaction of isophorane diisocyanate (IPDI) (25–40 wt%) to form LFAOIH@GOx-PU35 nanocomposites. The synthesized materials were characterized by Fourier transform infrared spectroscopy (FTIR); 1H, 13C, and 29Si nuclear magnetic resonance; and X-ray photoelectron spectroscopy. A detailed examination of LFAOIH@GO0.5-PU35 morphology was conducted using X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. These studies revealed distinctive surface roughness features along with a contact angle of around 88 G.U preserving their structural integrity at temperatures of up to 235 °C with minimal loading of GO. Additionally, improved mechanical properties, including scratch hardness (3 kg), pencil hardness (5H), impact resistance, bending, gloss value (79), crosshatch adhesion, and thickness were evaluated with the dispersion of GO. Electrochemical corrosion studies, involving Nyquist, Bode, and Tafel plots, provided clear evidence of the outstanding anticorrosion performance of the coatings.

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“…On the basis of carbon steel, various levels of corrosion-resistant alloyed rebars can be designed and produced through the addition of corrosion-resistant alloy elements, such as Cr, Ni and Mo [11][12][13][14][15], which not only greatly improve the corrosion resistance of the rebar, but meet the processing requirements, which include weldability and plastic deformation capacity. In our previous research, we produced a novel 00Cr10MoV alloyed corrosion-resistant rebar [10,16,17]. Compared to carbon steel rebar, it exhibits excellent passivation performance and chloride-induced corrosion resistance, which are likely to result in increased lifespan when used in concrete structures in harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Enhanced Passivation and Anti-Corrosion Performance of Surface-Nanocrystallization-Modified Cr-Alloyed Rebar via Electrochemical Testing and XPS Depth Analysis

Wang

Zou

et al. 2023

Coatings

Self Cite

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Surface nanocrystallization (SNC) modification can be used to realize the high-efficiency derusting of rusted Cr-alloyed rebar and obtain nanostructured grains on the surface of the rebar. The corrosion resistance performance of SNC rebar in a simulated Cl--containing concrete pore solution was evaluated on the basis of electrochemical experiments. Potentiodynamic polarization testing showed that the passivation current density of the SNC rebar was about 18% of that of the rusted rebar. The structural composition of the passivation film of the SNC rebar in a concrete environment was studied using a novel characterization method, namely XPS deep sputtering, which confirmed that it had higher concentrations of Cr/Fe oxide and hydroxide, and therefore exhibited an enhanced degree of oxidation. Moreover, scanning electron microscopy and transmission electron microscopy were employed to investigate the microstructural characteristics of the SNC rebar, which was characterized by nanostructured grains with grain sizes ranging from 250 nm to 300 nm and which contained massive high-energy crystal defects, thereby promoting the film-forming reaction of Cr/Fe elements. The results of XPS depth analysis and microstructure characterization demonstrated that the SNC rebar exhibited excellent passivation performance in the concrete environment. These findings offer a new perspective on enhancing the passivation performance and chloride resistance of alloyed rebar, and provide guidance on the implementation of SNC rebar in actual engineering applications.

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Corrosion resistance and corrosion interface characteristics of Cr-alloyed rebar based on accelerated corrosion testing with impressed current

Cited by 18 publications

References 64 publications

Cavitation erosion-corrosion behaviour of Fe-19Cr-15Mn-0.66 N high nitrogen austenitic stainless steel in sodium chloride solution

Cavitation erosion-corrosion behaviour of Fe-19Cr-15Mn-0.66 N high nitrogen austenitic stainless steel in sodium chloride solution

Advanced Anticorrosive Graphene Oxide-Doped Organic-Inorganic Hybrid Nanocomposite Coating Derived from Leucaena leucocephala Oil

Revealing the Enhanced Passivation and Anti-Corrosion Performance of Surface-Nanocrystallization-Modified Cr-Alloyed Rebar via Electrochemical Testing and XPS Depth Analysis

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