Improvement of the Corrosion Resistance of Carbon Steel by Plasma Deposited Thin Films

Rangel, Rita C.C.; Pompeu, Tagliani C.; Barros, José Luiz S.; Antonio, Nazir M. Santos César A.; Pelici, Bianca O.; Freire, Célia Marina de Alvarenga; Cruz, Nilson Cristino da; Range, Elidiane C.

doi:10.5772/34623

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…Similar results were obtained in a previous work 15 using a higher pressure (20 Pa) but with no oxygen addition in the gas mixture. The films deposited with the discharge power exceeding 50 W kept only a few hours adhered to the substrates.…”

Section: Thicknesssupporting

confidence: 80%

“…Therefore, the etching rate of the films was considered null in all the cases. This result, also observed in a previous study 15 , is ascribed to the oxidation of the very first atomic layers of the films with intense loss of methyl groups, resulting in an oxide top layer. This one, very resistant to the atomic oxygen attack, protects the underneath organosilicon bulk from further ablation.…”

Section: Corrosion Resistancesupporting

confidence: 73%

“…The bare aluminum alloy itself presents a high total resistance (~10 4 Ω) compared to the bare carbon steel (~10 2 Ω) 15 . As the film is deposited, R t in general grows but at different rates, depending on the power used for preparing the films.…”

Section: Corrosion Resistancementioning

confidence: 99%

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Corrosion resistance of 2024 aluminum alloy coated with plasma deposited a-C:H:Si:O films

et al. 2014

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AA 2024 aluminum alloy is widely employed in aeronautic and automobilist industries. Its hardness and low density are attractive properties for such industrial areas. However, since it contains copper, it undergoes severe corrosion in aggressive media as saline or low Earth orbit environments. In this work, it was investigated the properties of films deposited by PECVD on AA 2024 aluminum alloy as well as the corrosion resistance of the film/substrate systems under different corrosive atmospheres. Films were prepared in a plasma atmosphere composed of 50% of oxygen and 50% of hexamethyldisiloxane resulting in a total gas pressure of 4.0 Pa. Plasma ignition was promoted by the application of radiofrequency signal (13.56 MHz) to the sample holder while grounding the topmost electrode. The plasma excitation power, P, was changed from 10 to 80 W in the six different set of experiments. Film thickness, measured by profilometer, increases by 5 times as P was elevated from 10 to 80 W. As demonstrated by the infrared spectra of the samples, films are essentially organosilicons with preservation of functional groups of the precursor molecule and with creation of different ones. The oxide proportion and the structure crosslinking degree are affected by the plasma excitation power. According to the results obtained by sessile drop technique, hydrophilic to moderately hydrophobic films are produced with changing P from 10 to 80 W. The corrosion resistance, evaluated by salt spray and electrochemical impedance spectroscopy, EIS, experiments, in general increases after film deposition. It is demonstrated that film deposition improves, in up to 36 times, the resistance of the alloy to salt spray attack. It is also shown an improvement of about 240 times in the alloy resistance under NaCl solution by the EIS data. Micrographs acquired by Scanning Electron Microscopy after the corrosion tests furnish further information on the importance of the layer physical stability on its barrier properties. Furthermore, films highly protect the alloy against the oxygen attack. Interpretations are proposed based on the modification of the plasma kinetics with P, altering film structure, composition and properties.

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Section: Thicknesssupporting

confidence: 80%

Section: Corrosion Resistancesupporting

confidence: 73%

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Corrosion resistance of 2024 aluminum alloy coated with plasma deposited a-C:H:Si:O films

et al. 2014

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Hydrogenated Silicon Carbonitride Thin Film Nanostructuring Using SF6 Plasma: Structural and Optical Analysis

Saloum

Shaker

Alkafri

et al. 2020

Silicon

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The microwave assisted synthesis of 1-alkyl-3-methylimidazolium bromide as potential corrosion inhibitor toward carbon steel in 1 M HCl solution saturated with carbon dioxide

Pasasa¹,

Bundjali²,

Wahyuningrum³

2015

AIP Conference Proceedings

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Injection of corrosion inhibitor into the fluid current of oil and gas pipelines is an effective way to mitigate corrosion rate on the inner-surface parts of pipelines, especially carbon steel pipelines. In this research, two alkylimidazolium ionic liquids, 1-decyl-3-methylimidazolium bromide (IL1) and 1-dodecyl-3-methylimidazolium bromide (IL2) have been synthesized and studied as a potential corrosion inhibitor towards carbon steel in 1 M HCl solution saturated with carbon dioxide. IL1 and IL2 were synthesized using microwave assisted organic synthesis (MAOS) method. Mass Spectrometry analysis of IL1 and IL2 showed molecular mass [M-H+] peak at 223.2166 and 251.2484, respectively. The FTIR, 1 H-NMR and 13 C-NMR spectra confirmed that IL1 and IL2 were successfully synthesized. Corrosion inhibition activity of IL1 and IL2 were determined using weight loss method. The results showed that IL1 and IL2 have the potential as good corrosion inhibitors with corrosion inhibition efficiency of IL1 and IL2 are 96.00% at 100 ppm (343 K) and 95.60% at 50 ppm (343 K), respectively. The increase in the concentration of IL1 and IL2 tends to improve their corrosion inhibition activities. Analysis of the data obtained from the weight loss method shows that the adsorption of IL1 and IL2 on carbon steel is classified into chemisorption which obeys Langmuir's adsorption isotherm.

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Improvement of the Corrosion Resistance of Carbon Steel by Plasma Deposited Thin Films

Cited by 4 publications

References 24 publications

Corrosion resistance of 2024 aluminum alloy coated with plasma deposited a-C:H:Si:O films

Corrosion resistance of 2024 aluminum alloy coated with plasma deposited a-C:H:Si:O films

Hydrogenated Silicon Carbonitride Thin Film Nanostructuring Using SF6 Plasma: Structural and Optical Analysis

The microwave assisted synthesis of 1-alkyl-3-methylimidazolium bromide as potential corrosion inhibitor toward carbon steel in 1 M HCl solution saturated with carbon dioxide

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