Polymer plating on AZ31 magnesium alloy surface and film evaluation of corrosion property

Kang, Zhixin; Sang, Jing; Shao, M.; Li, Yuanyuan

doi:10.1016/j.jmatprotec.2008.10.029

Cited by 20 publications

(4 citation statements)

References 22 publications

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“…7. The shape and magnitude of impedance in the Nyquist plot of the uncoated AZ31 Mg alloy were very similar to the previous reports, 47,[52][53][54] and the curve was characterized by a capacitive loop in the high frequency range and an inductive loop in the low frequency range ͑Fig. 7A͒.…”

Section: Table II Results Of Potentiodynamic Corrosion Tests For (A) ...supporting

confidence: 87%

Electrochemical Corrosion Properties of Nanostructured YSZ Coated AZ31 Magnesium Alloy Prepared by Aerosol Deposition

Ryu

Park

et al. 2011

J. Electrochem. Soc.

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Yttria stabilized zirconia ͑YSZ͒ coating was formed on an AZ31 Mg alloy by aerosol deposition ͑AD͒ at room temperature, and its electrochemical corrosion properties were investigated in 3.5 wt % NaCl solution by potentiodynamic polarization test, potentiostatic test, and electrochemical impedance spectroscopy ͑EIS͒. The crack-free, dense, and ϳ4 m thick YSZ coating was successfully obtained by the AD method. The YSZ coating was polycrystalline and composed of ϳ10 nm nanocrystallites. The potentiodynamic test indicated that the YSZ coated AZ31 Mg alloy had a more positive corrosion potential ͑−1.39 V vs SCE͒, much lower corrosion current density ͑0.02 A/cm 2 ͒, and much higher polarization resistance ͑2500 k⍀ cm 2 ͒ in comparison to an uncoated Mg alloy. The pitting corrosion was observed in the YSZ coated Mg alloy, and the determined pitting potential ͑E b ͒ was close to −0.8 V vs SCE. EIS results demonstrated that the impedance of the YSZ coated Mg alloy was ϳ10 7 ⍀ cm 2 at low frequencies, which was ϳ5 orders of magnitude higher than that of the uncoated Mg alloy. Furthermore, the high impedance ͑ Ͼ 10 6 ⍀ cm 2 ͒ of the YSZ coated Mg alloy was still maintained after 120 h immersion in 3.5 wt % NaCl solution. Consequently, the corrosion resistance of the AZ31 Mg alloy was significantly improved by the AD YSZ coating.

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Section: Table II Results Of Potentiodynamic Corrosion Tests For (A) ...supporting

confidence: 87%

Electrochemical Corrosion Properties of Nanostructured YSZ Coated AZ31 Magnesium Alloy Prepared by Aerosol Deposition

Ryu

Park

et al. 2011

J. Electrochem. Soc.

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“…Figure displays the Nyquist plots of the bare magnesium alloy and the as-prepared superhydrophobic surfaces. Many researchers have found that the capacitive loop at high frequency is ascribed to the charge transfer resistance ( R ct ) ,, and that the diameter of the capacitive loop related to R ct in the Nyquist plots represents the impedance of the samples. It can be clearly seen in Figure that the superhydrophobic surface exhibited much higher impedance values in the 3.5 wt % aqueous solutions of NaCl, Na 2 SO 4 , NaNO 3 , and NaClO 3 , indicating that the as-prepared superhydrophobic surface has a much better corrosion resistance in the above corrosive media.…”

Section: Resultsmentioning

confidence: 99%

One-Step Electrodeposition Process To Fabricate Corrosion-Resistant Superhydrophobic Surface on Magnesium Alloy

Liu

Chen

Kang

2015

ACS Appl. Mater. Interfaces

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369

164

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A simple, one-step method has been developed to construct a superhydrophobic surface by electrodepositing Mg-Mn-Ce magnesium plate in an ethanol solution containing cerium nitrate hexahydrate and myristic acid. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy were employed to characterize the surfaces. The shortest electrodeposition time to obtain a superhydrophobic surface was about 1 min, and the as-prepared superhydrophobic surfaces had a maximum contact angle of 159.8° and a sliding angle of less than 2°. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements demonstrated that the superhydrophobic surface greatly improved the corrosion properties of magnesium alloy in 3.5 wt % aqueous solutions of NaCl, Na2SO4, NaClO3, and NaNO3. Besides, the chemical stability and mechanical durability of the as-prepared superhydrophobic surface were also examined. The presented method is rapid, low-cost, and environmentally friendly and thus should be of significant value for the industrial fabrication of anticorrosive superhydrophobic surfaces and should have a promising future in expanding the applications of magnesium alloys.

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“…1 But in its absence many other surface treatment techniques have thrived: electrodeposition, polymer plating, anodic oxidation, physical vapor deposition, chemical vapor deposition as well as several different conversion coatings, are but a few examples of these. [2][3][4][5] In recent years, silane based coatings, employed using the sol-gel technique, have proven to be a promising substitute for Cr 6+ based surface treatments of metallic substrates. 6 Silane coatings, much akin to other hybrid inorganicorganic materials, possess the combined advantages of both inorganic and organic moieties.…”

Section: Introductionmentioning

confidence: 99%

Hybrid silane coating reinforced with silanized graphene oxide nanosheets with improved corrosion protective performance

2016

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Polymer plating on AZ31 magnesium alloy surface and film evaluation of corrosion property

Cited by 20 publications

References 22 publications

Electrochemical Corrosion Properties of Nanostructured YSZ Coated AZ31 Magnesium Alloy Prepared by Aerosol Deposition

Electrochemical Corrosion Properties of Nanostructured YSZ Coated AZ31 Magnesium Alloy Prepared by Aerosol Deposition

One-Step Electrodeposition Process To Fabricate Corrosion-Resistant Superhydrophobic Surface on Magnesium Alloy

Hybrid silane coating reinforced with silanized graphene oxide nanosheets with improved corrosion protective performance

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