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Silane coupling agent (SCA) pretreatment and polycaprolactone (PCL) coating for enhanced corrosion resistance for magnesium / Jialin Niu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
[article]
Titre : Silane coupling agent (SCA) pretreatment and polycaprolactone (PCL) coating for enhanced corrosion resistance for magnesium Type de document : texte imprimé Auteurs : Jialin Niu, Auteur ; Huiyin Liu, Auteur ; Xin Ping, Auteur ; Xianchao Xun, Auteur ; Guangyu Li, Auteur Année de publication : 2019 Article en page(s) : p. 125-133 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages
Anticorrosifs
Anticorrosion
Caractérisation
Electrochimie
Magnésium -- Alliages
Métaux -- Revêtements protecteurs
Morphologie (matériaux)
Poly-e-caprolactone
Réaction de couplage
Revêtements -- Analyse
Silanes
Surfaces (Physique)
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : To address the problem of rapid corrosion of magnesium (Mg) alloys, a biodegradable polymer film of polycaprolactone (PCL) with KH550 as silane coupling agent (SCA) was coated on Mg substrate. The effect of the coating was analyzed using electrochemical tests (potentiodynamic polarization curves and electrochemical impedance spectroscopy) and immersion tests (hydrogen evaluation tests and scratch tests). The electrochemical tests showed that the corrosion resistance was extremely improved (by nearly two orders for icorr and 1.04 V for Ecorr), and the immersion tests illustrated that the connection between PCL and Mg substrate was enhanced as well (especially in scratch tests), thus indicating significant improvement of the corrosion resistance of SCA-pretreated PCL polymer samples. In summary, SCA-pretreated PCL is a promising coating to decrease the degradation behavior of Mg substrate. Note de contenu : - EXPERIMENTAL : Materials and specimen preparation - Characterization - Electrochemical tests - Immersion tests
- RESULTS AND DISCUSSION : Surface morphology of coatings - FTIR analysis of coatings - Electrochemical corrosion behavior - Immersion degradation behavior
- Table 1 : Chemical composition of SBF
- Table 2 : Corrosion potential Ecorr and corrosion current density icorr obtained from PDP curves by Tafel method, cathodic Tafel slope, and corrosion resistance (Rp) values of Mg, MS, MP, and MSPDOI : 10.1007/s11998-018-0107-y En ligne : https://link.springer.com/article/10.1007/s11998-018-0107-y Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31976
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 125-133[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20659 - Périodique Bibliothèque principale Documentaires Disponible Surface modification techniques of magnesium-based alloys for implant applications / Vinod Kumar Mahto in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
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Titre : Surface modification techniques of magnesium-based alloys for implant applications Type de document : texte imprimé Auteurs : Vinod Kumar Mahto, Auteur ; Arvind Kumar Singh, Auteur ; Anup Malik, Auteur Année de publication : 2023 Article en page(s) : p. 433-455 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Implants médicaux
Magnésium -- Alliages
Matériaux -- Propriétés mécaniques
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Biodegradable materials like magnesium-based alloys are widely employed for making implants. Mg-based alloys show good biocompatibility, biodegradability, and mechanical properties similar to bone material unlike other commonly used implant materials, i.e., stainless steel, titanium, and Co–Cr alloy, which have negligible degradation rates and require revision surgery for the removal of the implant. Magnesium alloy-based implant has high degradation rates and avoids the need for a second surgery. But high degradation rates and poor mechanical properties in magnesium alloys also pose a challenge to their use as implant material. In the absence of controlled degradation, they can degrade completely before serving their intended purpose in the human body. Several surface modification techniques are used to control the degradation rates. Surface coating is one of the methods of surface modification. This paper discusses various types of surface coating techniques for magnesium-based alloys. This paper also discusses the future scope of surface technology of magnesium-based implant materials. Note de contenu : - TYPES OF MEDICAL IMPLANTS
- BASIC REQUIREMENTS OF A SUITABLE IMPLANT MATERIAL
- COMMONLY USED MATERIALS FOR IMPLANT APPLICATIONS
- IMPORTANCE OF MAGNESIUM ALLOY FOR IMPLANT APPLICATIONS : Designation of magnesium alloys - Mechanical properties analysis of Mg with other metallic implants - Advantages and disadvantages of Mg alloys - Need of surface modification in magnesium-based implant materials
- VARIOUS SURFACE MODIFICATION TECHNIQUES OF MAGNESIUM-BASED ALLOYS : Conversion coatings - Non-conversion coatings
- CONCLUSIONS AND FUTURE SCOPE : Surface morphology - Corrosion rate - Materials used for coating - Mechanical behavior - Type of method used for coating
- Table 1 : Important properties of implant material
- Table 2 : Commonly used materials for implant applications
- Table 3 : Abbreviation used for alphanumeric designation of various alloys of magnesium
- Table 4 : Alphanumeric designation of magnesium alloys (example of AZ31B in parentheses)
- Table 5 : Mechanical properties of implant materials
- Table 6 : Advantages of Mg-based alloys
- Table 7 : Disadvantages of Mg-based alloys
- Table 8 : Various coating materials reviewed in this paper
- Table 9 : Different coating processes, substrate materials, coating materials, related advantages, and disadvantagesDOI : https://doi.org/10.1007/s11998-022-00716-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00716-9.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39290
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 433-455[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Top coating of low-molecular weight polymer MALPB used for enhanced protection on anodized AZ31B Mg alloys / Jinwei Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 6 (11/2010)
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Titre : Top coating of low-molecular weight polymer MALPB used for enhanced protection on anodized AZ31B Mg alloys Type de document : texte imprimé Auteurs : Jinwei Wang, Auteur ; Jinwei Tang, Auteur ; Yedong He, Auteur Année de publication : 2010 Article en page(s) : p. 737-746 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydride maléique
Anticorrosifs
Anticorrosion
Magnésium -- Alliages
Métaux -- Oxydation anodique
Microscopie électronique à balayage
Polybutadiène
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : A protective composite coating on an AZ31B magnesium alloy was prepared by anodic oxidation to form an oxide layer, followed by single immersion in maleic anhydride-g-liquid polybutadiene (MALPB) solution to cover a polymer coating on top. As a low-molecular weight polymer with low viscosity, MALPB had a tendency to infiltrate into the pores and cracks in the anodic layer to fill the defects among oxides so that a compact layer could be formed after it was cured by its hardeners, as observed by scanning electron microscopy (SEM). This compact layer, which was composed of anodic oxides integrated with solidified MALPB, possessed thickness around 0.7 μm as detected by energy dispersive X-ray (EDX). The anodized, MALPB-coated AZ31B alloy exhibited enhancement in corrosion resistance superior to that separately coated by anodizing oxides or MALPB, as reflected by its much higher corrosion potentials (E ccor) and lower corrosion current density (i corr) in DC polarization tests. Based on electrochemical impedance spectroscopy (EIS) data, we conclude that the anticorrosive performance of the composite coating can be attributed to the barrier effects provided by different layers when the electrolyte passed through the MALPB layer, compact layer, and then the inner anodic layer before it reached the surface of Mg alloy, and that among them, the compact layer acted as a much more effective barrier to the electrolyte. The appearance of damaged areas on the composite coating surface after a much longer duration in a salt spray environment revealed that the life-span of the AZ31B Mg alloy could be greatly prolonged if the pores and cracks on the anodizing films were properly sealed by suitable polymers. DOI : 10.1007/s11998-010-9258-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9258-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10401
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 6 (11/2010) . - p. 737-746[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012672 - Périodique Bibliothèque principale Documentaires Disponible