A concise review on corrosion inhibitors : types, mechanisms and electrochemical evaluation studies / I. A. Wonnie Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 241–268 Titre : A concise review on corrosion inhibitors : types, mechanisms and electrochemical evaluation studies Type de document : texte imprimé Auteurs : I. A. Wonnie Ma, Auteur ; Sh. Ammar, Auteur ; Sachin S. A. Kumar, Auteur ; S. Ramesh, Auteur Année de publication : 2022 Article en page(s) : p. 241–268 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Electrochimie Inhibiteurs (chimie) Index. décimale : 667.9 Revêtements et enduits Résumé : This article presents a concise review of different types of inhibitors for corrosion protection on metal surfaces. Corrosion inhibitors can be of different types, which include organic, inorganic and hybrid (organic/inorganic) materials. They are also classified as cathodic, anodic and/or mixed-type inhibitors, which are based on the active inhibitor molecules that retard the corrosion process. Silicate, nitrites, molybdates, phosphates, zinc salt and cerium salt are widely used as inorganic inhibitors. Many organic compounds have been widely utilized as inhibitors. Corrosion protection will be obtained by various mechanisms such as physisorption, chemisorption, barrier protection, thin-film formation and electrochemical processes. The type of inhibitors, inhibition mechanism and the evaluation methods have been explained in detail. Note de contenu : - TYPE OF CORROSION INHIBITORS : Inorganic inhibitors - Organic inhibitor - Hybrid organic-inorganic inhibitor INHIBITION MECHANISM OF CORROSION INHIBITORS : Adsorptive interaction of corrosion inhibitors on the metal surface - Inhibition of electrochemical process - Electrochemical evaluation for corrosion inhibitor studies - Table 1 Type of organic inhibitors and inhibition efficiency - Table 2 Inhibition efficiency of some corrosion inhibitors evaluated by electrochemical measurement deployed for various type of metal corrosion reduction DOI : https://doi.org/10.1007/s11998-021-00547-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00547-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37156 [article]

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Corrosion protection performance of nanocomposite coatings under static, UV, and dynamic conditions / Y. A. Basiru in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 1035-1047 Titre : Corrosion protection performance of nanocomposite coatings under static, UV, and dynamic conditions Type de document : texte imprimé Auteurs : Y. A. Basiru, Auteur ; Sh. Ammar, Auteur ; K. Ramesh ; B. Vengadaesvaran ; S. Ramesh ; A. K. Arof Année de publication : 2018 Article en page(s) : p. 1035-1047 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion Matériaux hybrides Photodétérioration Revêtements -- Effets du rayonnement ultraviolet Revêtements organiques Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Silicone-modified epoxy polymeric matrix was successfully fabricated and reinforced with 1–2 wt% SiO2, TiO2, and TiSiO4 nanoparticles. Fourier-transform infrared spectroscopy, contact angle measurements, differential scanning calorimetry, and field-emission scanning electron microscopy together with energy-dispersive X-ray spectroscopy were employed to investigate different characteristics of the prepared coatings. To simulate operating conditions, all samples were characterized via electrochemical impedance spectroscopy (EIS) after being subjected to different conditions. Corrosion under static conditions, in which the samples were exposed to a static electrolyte without further change in other parameters, was investigated. Furthermore, to study the effects of ultraviolet (UV) radiation in accelerating the degradation of the coatings, samples were characterized after being subjected to UV while immersed statically in the electrolyte. Additionally, the corrosion protection performance was investigated after subjecting the coated substrates to dynamic conditions involving continuous movement of the sample in the electrolyte, simulating continuous wear of the coated surfaces. Compared with the static condition, the EIS results revealed the vital role of the silicone resin and nanoparticles in improving the stability of the coating film against corrosion degradation in the presence of UV radiation, while poor performance in dynamic condition was recorded for all the coating systems. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Coating preparation - CHARACTERIZATION : Fourier-transform infrared (FTIR) spectroscopy - Contact angle (CA) measurements - Differential scanning calorimetry (DSC) - Surface morphology analysis - Electrochemical impedance spectroscopy ( EIS) - RESULTS AND DISCUSSION : Fourier-transform infrared (FTIR) spectroscopy - Contact angle (CA) measurements - Differential scanning calorimetry (DSC) - Surface morphology - Electrochemical impedance spectroscopy (EIS) - Static condition - Ultraviolet (UV) condition - Dynamic testing - Assessment of EIS results in static, UV, and dynamic conditions DOI : 10.1007/s11998-017-0038-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0038-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31127 [article]

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Formulation and characterization of hybrid polymeric/ZnO nanocomposite coatings with remarkable anti-corrosion and hydrophobic characteristics / Sh. Ammar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 921-930 Titre : Formulation and characterization of hybrid polymeric/ZnO nanocomposite coatings with remarkable anti-corrosion and hydrophobic characteristics Type de document : texte imprimé Auteurs : Sh. Ammar, Auteur ; K. Ramesh, Auteur ; B. Vengadaesvaran, Auteur ; S. Ramesh, Auteur ; A. K. Arof, Auteur Année de publication : 2016 Article en page(s) : p. 921-930 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Caractérisation Hydrophobie Matériaux hybrides Morphologie (matériaux) Nanoparticules Oxyde de zinc Polyacryliques Revêtements protecteurs Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : A simple chemical technique has been used to prepare core–shell extender pigments based on Nigerian indigenous clays as core and titanium dioxide as shell. The prepared core–shell extender pigments were characterized using X-ray fluorescence and scanning electron microscopy. The physico-chemical properties of these extender pigments were also evaluated according to ASTM measurements. The study showed that the prepared core–shell pigments were nontoxic and environmentally friendly. They are of low cost and can be incorporated in semi-gloss paints, paper, rubber, and plastic composites without much effect on the volume. The characteristics of these pigments showed that they combine the properties of both their precursors, and have the potential to overcome their disadvantages, e.g., low hiding power of clays and photochemical activity of titanium dioxide. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials and sample preparation - Characterization - RESULTS AND DISCUSSION : Fourier transform infrared spectroscopy (FTIR) - Morphological studies (FESEM and EDX) - Contact angle (CA) - Electrochemical impedance spectroscopy (EIS) DOI : 10.1007/s11998-016-9799-z En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9799-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27131 [article]

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The evaluation of miscibility of poly(vinyl chloride) and poly(ethylene oxide) blends by DSC, refractive index and XRD analyses / S. Ramesh in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 4 (09/2009)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 4 (09/2009) . - p. 354-358 Titre : The evaluation of miscibility of poly(vinyl chloride) and poly(ethylene oxide) blends by DSC, refractive index and XRD analyses Type de document : texte imprimé Auteurs : S. Ramesh, Auteur ; A. K. Arof, Auteur Année de publication : 2009 Article en page(s) : p. 354-358 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Analyse thermique Chlorure de polyvinyle Diffractométrie de rayons X Polyéthylène glycol Polymères -- Analyse Réfractométrie Index. décimale : 668.9 Polymères Résumé : The miscibility of poly(vinyl chloride) (PVC) and poly(ethylene oxide) (PEO) blends was investigated by using differential scanning calorimetry (DSC), refractive index measurements and x-ray diffraction (XRD) analysis. The negative Flory-Huggins interaction parameter, χ12 from the melting point depression of PEO by the blending of PVC shows that the interaction between PVC/PEO occurs. A refractive index measurement was performed to show that the miscibility of PVC/PEO blends occurs not only in solid form but also in solution form. The linear variation with composition of the refractive index of the polymer blend solutions in THF at 28°C, 40°C and 50°C indicates the miscibility of PVC with PEO. The shift in peaks in XRD of PEO by the blending of PVC is a characteristic evidence of complexation between PVC and PEO. DOI : 10.3139/217.2275 En ligne : https://drive.google.com/file/d/10pQ6YJaiv-Tx--c4julJsa4IF_M3cbue/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6080 [article]

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