Hydrotalcite conversion coating on Mg alloy and its corrosion resistance

Wang, Jun; Li, Dandan; Yu, Xibin; Jing, Xiaoyan; Zhang, Milin; Jiang, Zhaohua

doi:10.1016/j.jallcom.2010.01.007

Cited by 114 publications

(36 citation statements)

References 35 publications

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“…No corrosion spot was observed after a 72 h salt spray test which was attributed to the formed protective barrier layer (Lin & Uan, 2009). Such a chemically-generation process may be further optimized using the separate nucleation and aging steps (SNAS) method which permits to form uniform and compact LDH films (Wang et al, 2010). Spin coating process was reported for AZ31 Mg alloy substrate (Zhang et al, 2008b), and spray-coated LDH formulation Mg3Al(OH)8NO2·2H2O bearing nitrite ions onto a steel surface was claimed to result in a good corrosion resistance when immersed for 30-days into a 3% brine solution (Abe & Yasuda, 2005).…”

Section: Ldh Based Anti-corrosion Coatingsmentioning

confidence: 99%

Nanocomposite Based Multifunctional Coatings

Hintze-Bruening¹,

Leroux²

2012

New Advances in Vehicular Technology and Automotive Engineering

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Section: Ldh Based Anti-corrosion Coatingsmentioning

confidence: 99%

Nanocomposite Based Multifunctional Coatings

Hintze-Bruening¹,

Leroux²

2012

New Advances in Vehicular Technology and Automotive Engineering

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“…Surface modification of Mg alloys includes a variety of approaches: chemical conversion film [5], micro-arc oxidation (MAO) or plasma electrolyte oxidation [6], polymeric coating [7], layer-by-layer film [8] and layered double hydroxide (LDH) coating [9].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of the Superhydrophobic Mg(OH)2/Mg-Al Layered Double Hydroxide Coatings on Magnesium Alloys

Zhang

Zeng

et al. 2016

Metals

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Abstract:Coatings of the Mg(OH) 2 /Mg-Al layered double hydroxide (LDH) composite were formed by a combined co-precipitation method and hydrothermal process on the AZ31 alloy substrate in alkaline condition. Subsequently, a superhydrophobic surface was successfully constructed to modify the composite coatings on the AZ31 alloy substrate using stearic acid. The characteristics of the composite coatings were investigated by means of X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electronic microscope (SEM) and contact angle (CA). The corrosion resistance of the coatings was assessed by potentiodynamic polarization, the electrochemical impedance spectrum (EIS), the test of hydrogen evolution and the immersion test. The results showed that the superhydrophobic coatings considerably improved the corrosion resistant performance of the LDH coatings on the AZ31 alloy substrate.

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“…It is well known that thermodynamic instability is a necessary condition for poor corrosion resistance but not a sufficient condition. From a dynamic point of view, the fundamental cause of corrosion damage of magnesium alloys is due to the inability of the surface to form a spontaneous, protective film compared with aluminum and titanium [9]. To date, several surface treatment techniques have been developed to enhance the corrosion resistance of alloys, including chemical conversion coating, electroplating, anodizing, spraying, ion implants, laser surface treatment.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviors of magnesium alloy with phosphate conversion coating in NaCl solutions

Dong

et al. 2016

Rare Met.

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A composite conversion coating was prepared on magnesium alloy by the only one-step immersion treatment. The characteristics of the conversion coating were investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results indicate that the composite conversion coating consists of magnesium hydroxide, magnesium phosphate and manganese phosphate. The electrochemical behavior of the conversion coating was investigated systematically by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurement in different NaCl solutions. Polarization measurements and EIS results reveal that the magnesium alloy with the conversion coating have better corrosion resistance compared to the bare magnesium alloy in these conditions. And the corrosion rate of the magnesium alloy with conversion coating increases consistently with the chloride ion concentration. In alkaline conditions, the magnesium alloy with conversion coating has superior corrosion resistance by the synergistic effects between Mg(OH) 2 film and conversion coating. Moreover, the electrochemical corrosion mechanism of the magnesium alloy was analyzed with respect to the conversion coating in a Cl -containing environment.

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Hydrotalcite conversion coating on Mg alloy and its corrosion resistance

Cited by 114 publications

References 35 publications

Nanocomposite Based Multifunctional Coatings

Nanocomposite Based Multifunctional Coatings

Corrosion Resistance of the Superhydrophobic Mg(OH)2/Mg-Al Layered Double Hydroxide Coatings on Magnesium Alloys

Electrochemical behaviors of magnesium alloy with phosphate conversion coating in NaCl solutions

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