Insight into the anti-corrosion performance of electrodeposited silane/nano-CeO2 film on carbon steel

Chen, Chengdong; Dong, Shuangshi; Hou, Ruiqing; Hu, Juan; Jiang, Pingli; Ye, Chenqing; Du, Rong-Gui; Lin, Changjian

doi:10.1016/j.surfcoat.2017.06.031

Cited by 37 publications

(6 citation statements)

References 51 publications

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“…The overall film thickness was 70.58 µm ± 18.73 µm, larger than other coatings deposited under similar conditions 12,14,[18][19][20] . However, one interesting fact, not yet reported, are preferential deposition regions, as shown in Table 1, which describes thickness values for the regions highlighted in Figure 2 by the letters A to L. Based on such results, it was possible to point out that the coating top region, marked by the letter A, B, and C, provided greater thicknesses than the bottom region.…”

Section: Resultsmentioning

confidence: 66%

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

et al. 2022

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The present work evaluated the structure and heterogeneities, surface chemistry, hydrophobicity level, and corrosion protection in a saline environment of electrodeposited sol-gel superhydrophobic coatings on carbon steel, using microscopy techniques, energy dispersive X-ray spectroscopy (EDX), water contact angle measurements, and electrochemical impedance spectroscopy (EIS). Furthermore, the effect of silane precursor concentration on the aforementioned response variables was tested. Regarding the structure, results point out rough deposits composed of two layers with different properties and thicknesses, and preferential deposition on the top area of the carbon steel coupon. Elemental mapping proved the chemical stability of the film in NaCl 3.5%wt., while increasing the amounts of silane precursor up to 40 mmol showed also increased results for water contact angle (157 o ), impedance modulus at 0.01 Hz (10 7 Ohm.cm 2 ), and film thickness (70 µm). However, the addition of greater amounts resulted in miscibility issues in the hydrolysis solution.

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Section: Resultsmentioning

confidence: 66%

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

et al. 2022

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“…Locations exposed to a corrosive medium lead to rapid localized corrosion with macroscopic pits. In particular, if the paint does not uniformly coat [37] the surface defects such as MnS inclusions and their immediate surroundings it leads to localized pitting due to exposure to a corrosive environment. The main objective of this paper is to explore the role of metallurgy in the corrosion process.…”

Section: Manganese Sulfide Inclusions Have Been Observed As Crack Inimentioning

confidence: 99%

Role of Metallurgy in the Localized Corrosion of Carbon Steel

Avci¹,

Davis²,

Rieders³

et al. 2018

JMMCE

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Localized residual strain develops within the metallurgical texture of 1018 carbon steel from metallurgical processes, such as fabrication, annealing, and shaping. This residual strain results in accelerated localized pitting due to the formation of anodic sites at these locations. Once initiated, micron-sized corrosion pits can coalesce to form sites of potential catastrophic failure. In this contribution, we focus on the localized biocorrosion which initiates and grows in areas of localized strain such as the interfaces between manganese sulfide (MnS) inclusions and ferrite grains in the steel, at grain boundaries between ferrite grains with different crystallographic orientations and at pearlite grains (intergrown cementite (Fe 3 C) and ferrite), which are readily found in 1018 carbon steel. Here we hypothesize and show experimentally that accelerated biocorrosion in 1018 carbon steel finds its roots in the electrochemical potential difference (micro galvanic cells) generated between the unstrained ferrite iron (Fe α −) and the lattice defects, dislocations and mismatches found at interfaces formed between Fe α − and secondary phases i.e. MnS inclusions, cementite lamellar structures and grain boundaries distributed throughout the 3D network of the carbon steel. This hypothesis is supported by results from multiple micro-and nanoscale imaging and analytical methods obtained from field emission scanning electron microscopy, energy dispersive spectroscopy, electron backscattered diffraction and Auger nanoprobe electron spectroscopy. The morphology and composition of grains in the steel coupons were characterized before and after exposure to suboxic and sulfidogenic environments dominated by aerobic and anaerobic marine organisms. Corrosion processes are demonstrated to initiate in localized areas of high residual strain.

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“…Embedding inorganic metal oxide nanoparticles (NPs) into EP resin improves the resistance of coating against corrosion and degradation due to decreasing of electrolyte diffusion pathways [27][28][29][30][31]. To uniform dispersion of nanoparticles without much agglomeration in EP and reduce the permeability of EP based coatings against oxygen, water, and ion transfer, the surface of nanoparticles was modi ed with a variety of organic and inorganic compounds [32][33][34][35]. Corrosion inhibitors can provide more corrosion protection, especially in active corrosion areas of coating.…”

Section: Introductionmentioning

confidence: 99%

The Effect of 2-Mercaptobenzimidazole-Polyaniline-CeO2 Ternary Nanocomposite Addition as a Superior Pigment for Improvement of Corrosion Resistance in Epoxy Coatings

Aboutalebi

Sefidi

Hosseini

et al. 2021

Preprint

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The 2-mercaptobenzimidazole-polyaniline-ceria (MBI-PANI-CeO2) ternary nanocomposite synthesized and used as pigment into epoxy (EP) to improve protection properties of coating on mild steel. The MBI-PANI-CeO2 nanocomposite was prepared using layer by layer assembly. Initially, the PANI layer was polymerized on the surface of CeO2 nanoparticles. Then, the MBI inhibitor was adsorbed on PANI with opposite electrostatic charges. The anticorrosive performance of EP coatings was investigated using electrochemical impedance spectroscopy, salt spray test, and scanning electron microscopy by incorporating various amounts (0.5, 1, and 2 wt. %) of the MBI-PANI-CeO2 nanocomposite. The EP coating containing 1 wt. % of nanocomposite showed the highest corrosion resistance and minimum agglomeration. This coating indicated the coating resistance of 19.1 MΩ cm2, which is greater than EP and EP/CeO2 coatings. The EP/MBI-PANI-CeO2 (1 wt. %) coating showed water uptake percentage (2.09 %) about two times lower than EP/CeO2 coatings (4.56 wt. %), indicating appropriate barrier performance of inhibitor incorporated EP.

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Insight into the anti-corrosion performance of electrodeposited silane/nano-CeO2 film on carbon steel

Cited by 37 publications

References 51 publications

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

Role of Metallurgy in the Localized Corrosion of Carbon Steel

The Effect of 2-Mercaptobenzimidazole-Polyaniline-CeO2 Ternary Nanocomposite Addition as a Superior Pigment for Improvement of Corrosion Resistance in Epoxy Coatings

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