Mica/polypyrrole (doped) composite containing coatings for the corrosion protection of cold rolled steel / Niteen Jadhav in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 363-374 Titre : Mica/polypyrrole (doped) composite containing coatings for the corrosion protection of cold rolled steel Type de document : texte imprimé Auteurs : Niteen Jadhav, Auteur ; Takeshi Matsuda, Auteur ; Takeshi Matsuda, Auteur ; Victoria Gelling, Auteur Année de publication : 2018 Article en page(s) : p. 363-374 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Essais de brouillard salin Métaux -- Revêtements protecteurs Mica Pigments -- Synthèse Polarisation (électricité) Polypyrroles Spectroscopie d'impédance électrochimique Spectroscopie des rayons X Index. décimale : 667.9 Revêtements et enduits Résumé : Micas/polypyrroles (PPys) doped with molybdate, p-toluene sulfonate, dodecyl benzene sulfonate, and 2-naphthalene sulfonate composite pigments were synthesized by chemical oxidative polymerization and characterized in coatings for corrosion protection on cold rolled steel substrate by various electrochemical techniques. Synthesized composite pigments were characterized for morphology by scanning electron microscopy, which indicated physical formation of PPy on the surface of mica. Chemical composition of the composite pigments was analyzed by X-ray photoelectron spectroscopy which chemically confirmed doped PPy formation on the mica surface. Coatings were formulated at 20% pigment volume concentration (composite pigments or as-received mica pigment) and were applied on cold rolled steel substrate. Coatings were exposed to salt spray test conditions (ASTM B117) for 30 days and were periodically assessed for corrosion with electrochemical impedance spectroscopy (EIS), open circuit potential (OCP), and potentiodynamic polarization. EIS and circuit modeling results demonstrated higher coating resistance (R c) for mica/PPy (doped) composite coatings as compared to as-received mica pigment containing coating after 30 days of salt spray exposure. Lower current density and more positive corrosion potential values were observed for mica/PPy (doped) composite coatings as compared to mica pigment-based coating in potentiodynamic polarization measurements, indicating improved corrosion protection for cold rolled steel substrate. OCP measurements revealed more positive values for mica/PPy (doped) composite coatings as compared to mica pigment-based coating suggesting superior corrosion protection for mica/PPy (doped) composites. Note de contenu : - EXPERIMENTAL : Materials - CPCC synthesis and coatings preparation - CPCC and coatings characterization - RESULTS AND DISCUSSION : Morphology of CPCCs - Chemical composition - Corrosion performance - DOI : 10.1007/s11998-017-9974-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9974-x.pdf Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30295 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
19742	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)