Plasma deposition of a silicone-like layer for the corrosion protection of magnesium

Ko, Yeong-Mu; Choe, Han-Cheol; Jung, Sang‐Chul; Kim, Byung–Hoon

doi:10.1016/j.porgcoat.2013.05.024

Cited by 17 publications

(11 citation statements)

References 18 publications

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“…Low pressure plasma deposition systems were first developed for the preparation of homogeneous and uniform organosilicon, halocarbon, or hydrocarbon plasma polymer thin films. The list of investigated applications includes optical, anti-reflection, abrasion-resistant, and low-surface energy coatings, barrier layers, contact lubricants, dielectric layers, or intermediate adhesive and anticorrosive layers [56,62,63,64,65,66,67]. Low deposition and production rates at low pressure plasmas have motivated the current interest in developing more efficient methods for plasma polymerization using atmospheric pressure (AP) discharges.…”

Section: Introductionmentioning

confidence: 99%

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

et al. 2019

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Polymeric surfaces can benefit from functional modifications prior to using them for biological and/or technical applications. Surfaces considered for biocompatibility studies can be modified to gain beneficiary hydrophilic properties. For such modifications, the preparation of highly hydrophilic surfaces by means of plasma polymerization can be a good alternative to classical wet chemistry or plasma activation in simple atomic or molecular gasses. Atmospheric pressure plasma polymerization makes possible rapid, simple, and time-stable hydrophilic surface preparation, regardless of the type and properties of the material whose surface is to be modified. In this work, the surface of polypropylene was coated with a thin nanolayer of plasma-polymer which was prepared from a low-concentration mixture of propane-butane in nitrogen using atmospheric pressure plasma. A deposition time of only 1 second was necessary to achieve satisfactory hydrophilic properties. Highly hydrophilic, stable surfaces were obtained when the deposition time was 10 seconds. The thin layers of the prepared plasma-polymer exhibit highly stable wetting properties, they are smooth, homogeneous, flexible, and have good adhesion to the surface of polypropylene substrates. Moreover, they are constituted from essential elements only (C, H, N, O). This makes the presented modified plasma-polymer surfaces interesting for further studies in biological and/or technical applications.

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Section: Introductionmentioning

confidence: 99%

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

et al. 2019

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“…In addition, it has been shown that the use of siloxanes to modify the surface of coatings can result in several advantages, such as resistance against weathering, chemical resistance and enhanced barrier properties. Siloxanes are also known for their low surface energy rendering the coating surface hydrophobic [1], and polymerization of HMDSO gives a polymer structure resembling that of polydimethylsiloxane (PDMS) in that both have structural units of Si(CH 3 ) 2 O [28]. Thin plasma polymerized HMDSO coatings have also been reported to have good stability when immersed in water [29], even though reorientation of surface groups and migration of polar molecules to the coating-water interface reduces the surface hydrophobicity with time.…”

Section: Introductionmentioning

confidence: 99%

Long-term corrosion protection by a thin nano-composite coating

Ejenstam

Tuominen²,

Haapanen

et al. 2015

Applied Surface Science

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“…Figure 3 shows the infrared spectra of films deposited using two different oxygen proportions in the plasma feed: 0 and 50%. The wavenumber of the main absorption bands were collected and identified in Table 1, according to other relevant studies 10,11,[19][20][21][22][23][24][25] . The spectra revealed the presence of asymmetric (2950 cm -1 ) and symmetric (2900 cm -1 ) C-H stretching vibrations.…”

Section: Thicknessmentioning

confidence: 99%

“…Absorption bands detected in the infrared spectra of plasma-polymerized films from pure HMDSO or using equal proportions of HMDSO and O 2 in the gas mixture. 19 as well as an absorption at 1710 cm -1 associated with the C=O stretching mode 21 . Both contributions were not detected in the spectrum of the film prepared from pure HMDSO since they are not present in the original organosilicon molecule, corroborating the proposal of multiple step reactions in the plasma phase.…”

Section: Thicknessmentioning

confidence: 99%

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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Plasma deposition of a silicone-like layer for the corrosion protection of magnesium

Cited by 17 publications

References 18 publications

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

Fast Surface Hydrophilization via Atmospheric Pressure Plasma Polymerization for Biological and Technical Applications

Long-term corrosion protection by a thin nano-composite coating

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

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