Influence of a silane treatment on the corrosion resistance of a WE43 magnesium alloy

Zucchi, F.; Grassi, V.; Frignani, A.; Monticelli, C.; Trabanelli, G.

doi:10.1016/j.surfcoat.2005.02.073

Cited by 107 publications

(71 citation statements)

References 23 publications

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“…Compared to the single functional silane coating approach reported previously [16,17,42], this work utilizes BTSE as the first layer of coating to provide a hydrophobic barrier while minimising the interference from the functional groups (e.g. amino group [23]), which is important for the improved corrosion resistance of modified AZ31.…”

Section: Platelet Adhesion Behaviour On the Modified Az31 Mg Alloysmentioning

confidence: 99%

“…Among these technologies, silane based anticorrosive coatings of Mg alloys have been proven to be effective, economical and environmentally benign [16,17]. Silanes are a group of siliconbased organic-inorganic materials with the general formula R'(CH 2 ) n Si(OR) 3 , where R' is an organofunctional group and R is a hydrolysable alkoxy group.…”

Section: Introductionmentioning

confidence: 99%

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Biofunctionalized anti-corrosive silane coatings for magnesium alloys

et al. 2013

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Biodegradable magnesium alloys are advantageous in various implant applications, as they reduce the risks associated with permanent metallic implants. However, a rapid corrosion rate is usually a hindrance in biomedical applications. Here we report a facile two step procedure to introduce multifunctional, anticorrosive coatings on Mg alloys, such as AZ31. The first step involves treating the NaOH-activated Mg with bistriethoxysilylethane to immobilize a layer of densely crosslinked silane coating with good corrosion resistance; the second step is to impart amine functionality to the surface by treating the modified Mg with 3-amino-propyltrimethoxysilane. We characterized the two-layer anticorrosive coating of Mg alloy AZ31 by Fourier transform infrared spectroscopy, static contact angle measurement and optical profilometry, potentiodynamic polarization and AC impedance measurements. Furthermore, heparin was covalently conjugated onto the silane-treated AZ31 to render the coating haemocompatible, as demonstrated by reduced platelet adhesion on the heparinized surface. The method reported here is also applicable to the preparation of other types of biofunctional, anti-corrosive coatings and thus of significant interest in biodegradable implant applications.Keywords coatings, magnesium, alloys, corrosive, biofunctionalized, silane, anti Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsLiu, X., Yue, Z., Romeo, T., Weber, J., Scheuermann, T., Moulton, S. & Wallace, G. (2013). Biofunctionalized anti-corrosive silane coatings for magnesium alloys. Acta Biomaterialia, 9 (10), 8671-8677. AuthorsXiao Liu, Zhilian Yue, Tony Romeo, Jan Weber, Torsten Scheuermann, Simon E. Moulton, and Gordon G. Wallace AbstractBiodegradable magnesium (Mg) alloys are advantageous in various implant applications, as they reduce the risks associated with permanent metallic implants. However, the fast corrosion rate is usually a hindrance in biomedical applications. Here we report a facile twostep procedure to introduce multifunctional, anticorrosive coatings on Mg alloys, such as AZ31. The first step involves treating the NaOH-activated Mg with bistriethoxysilylethane (BTSE) to immobilise a layer of densely crosslinked silane coating with good corrosion resistance; the second step is to impart amine functionality to the surface by treating the modified Mg with 3-amino-propyltrimethoxysilane (γ-APS). We characterised the two-layer anticorrosive coating of AZ31 Mg alloy by Fourier transform infrared spectroscopy, static contact angle measurement and optical profilometry, potentiodynamic polarization and AC impedance measurements. Furthermore, heparin was covalently conjugated onto the silane treated AZ31 to render the coating haemocompatible, as demonstrated by reduced platelet adhesion on the heparinised surface. The method reported here is also applicable to the preparation of other types of biofunctional, anticorrosive coatings, and thus of significant interest in biodegradable implant applications.

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Section: Platelet Adhesion Behaviour On the Modified Az31 Mg Alloysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biofunctionalized anti-corrosive silane coatings for magnesium alloys

et al. 2013

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“…The temperature and time of the heat treatment depend on the kind of precursors and solvents used to produce the coating, but economically it is more interesting to work at lower temperatures and shorter times. Many works report the production of sol-gel coatings with low-temperature heat treatments [19][20][21][22][23][24][25][26][27][28][29][30][31] . The objective of this work is to determine the effects of three different acids (acetic, hydrochloric and nitric acids) added to the formulation of the sol of the siloxane-PMMA hybrid films on the morphological and physical-chemical properties of these films and to evaluate their anti-corrosion performance when deposited on tinplate.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Siloxane-poly(methyl methacrylate) Hybrid Films Obtained on a Tinplate Substrate Modified by the Addition of Organic and Inorganic Acids

et al. 2015

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Tinplate is used to food packaging and other types of packages. The corrosion resistance of the tinplate has been study due the necessity of an alternative to high environmental impact of chromatization process. Therefore protective coatings as hybrid films base elaborations with different acids are studied to improve the barrier effect against corrosion. The objective of this work is characterize hybrid films deposited on a tinplate from a sol made up of the alkoxide precursors 3-(trimethoxysilylpropyl) methacrylate (TMSM), tetraethoxysilane (TEOS) and poly(methyl methacrylate) (PMMA) together with one of three acids (acetic, hydrochloric or nitric acid) and to verify their action against the corrosion of the substrate. The films were obtained by a dip-coating process and cured for 3 hours at 160 °C. The film hydrophobicity was determined by contact angle measurements, and the morphology was evaluated by SEM. FTIR measurements were performed to characterize the chemical structures of the films. The electrochemical behavior of the coatings was evaluated by techniques open circuit potential monitoring (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results demonstrate that the siloxane-PMMA films improve the protective properties of the tinplate, with the films obtained by acetic acid addition exhibiting the greatest improvement.

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“…shown to provide levels of corrosion protection to the underlying metal substrate and their protective properties have been studied for number of Mg alloys such as WE43 [3] AZ31 [4], AZ91, AM50 [5], AZ63 [6] and WE43 [7]. Majority of these studies have shown effective corrosion protection afforded by the REE conversion coating in the short term (e.g.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy

Jamali

Moulton

Tallman

et al. 2015

Journal of Electroanalytical Chemistry

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Surface passivation of AZNd Mg alloy with Pr(NO 3 ) 3 is studied using scanning electrochemical microscopy (SECM) in surface generation/tip collection (SG/TC) and AC modes. Corrosion protection afforded by the Pr treatment and the degradation mechanism in a simulated biological environment was examined on a local scale and compared with non-treated AZNd. SG/TC mode results revealed a drastic decrease in H2 evolution due to the Pr treatment. Mapping the local insulating characteristics using AC-SECM showed higher conductivity of the surface where H 2 evolution was most favorable. Keywordsscanning, studied, fluid, biological, simulated, corrosion, microscopy, protection, electrochemical, afforded, praseodymium, conversion, film, mg, alloy, aznd Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsJamali, S. S., Moulton, S. E., Tallman, D. E., Forsyth, M., Weber, J., Mirabedini, A. & Wallace, G. G. (2015). Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy. Journal of Electroanalytical Chemistry, 739 211-217. AuthorsSeyed S. Jamali, Simon E. Moulton, Dennis E. Tallman, Maria Forsyth, Jan Weber, Azadehsadat Mirabedini, and Gordon G. Wallace AbstractSurface passivation of AZNd Mg alloy with Pr(NO 3 ) 3 is studied using scanning electrochemical microscopy (SECM) in surface generation/tip collection (SG/TC) and AC modes. Corrosion protection afforded by the Pr treatment and the degradation mechanism in a simulated biological environment was examined on a local scale and compared with nontreated AZNd. SG/TC mode results revealed a drastic decrease in H 2 evolution due to the Pr treatment. Mapping the local insulating characteristics using AC-SECM showed higher conductivity of the surface where H 2 evolution was most favorable.

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Influence of a silane treatment on the corrosion resistance of a WE43 magnesium alloy

Cited by 107 publications

References 23 publications

Biofunctionalized anti-corrosive silane coatings for magnesium alloys

Biofunctionalized anti-corrosive silane coatings for magnesium alloys

Characterization of Siloxane-poly(methyl methacrylate) Hybrid Films Obtained on a Tinplate Substrate Modified by the Addition of Organic and Inorganic Acids

Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy

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