| Titre : |
Characterization and corrosion protection properties of composite material (PANI+TiO2) coatings on A304 stainless steel |
| Type de document : |
texte imprimé |
| Auteurs : |
Souhila Abaci, Auteur ; Belkacem Nessark, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 107-120 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Acier inoxydable
AcierL'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
Caractérisation
Dioxyde de titane
Métaux -- Revêtements protecteurs
pH
Polyaniline
Résistance chimique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This work presents the corrosion protection behavior of A304 stainless steel in an acidic medium by using coatings based on polyaniline+TiO2 composite material. The influence of parameters such as concentration of aniline, TiO2 content, and pH of the solution were investigated. The coatings which had been deposited by cyclic voltammetry on substrates of A304 steel were then characterized by electrochemical impedance spectroscopy. The cyclic voltammograms showed three redox couples characteristic of the different oxidation and reduction states of the produced polymer. PANI+TiO2 composite material was observed to exhibit higher corrosion resistance and better properties. The effectiveness of coatings in preventing corrosion was tested by potentiodynamic polarization studies and scanning electron microscopy was used to characterize the morphology of the coatings. The results showed that PANI+TiO2 coatings offer good anticorrosion protection to steel in 1 M H2SO4 solutions. The micrograph taken at the coatings surface showed that (PANI+TiO2)/A304 composite was uniform in nature and TiO2 particles were uniformly covered by PANI. After immersion into a corrosive solution for 45 min, no aggressive effect was observed and the coating films were still present. Moreover, the formation of PANI+TiO2 composite was also confirmed by EDX. Furthermore, it was found that the presence of a low amount of TiO2 in PANI coatings afforded the best protection due to the formation of a coating layer on the metallic surface which behaved like a physical barrier against the aggressive medium attack. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Methods and electrodeposition of PANI+TiO2 composite film - Characterization techniques
- RESULTS AND DISCUSSION : Electropolymerization of aniline in H2SO4 environment on an A304 stainless steel electrode - Effect of TiO2 content in the film deposited on 1304 stainless steel - Effect of the aniline concentration on stainless steel - Protection of the stainless steel by the polyaniline modified by the incorporation of TiO2 (Tafel polarization curves) - Study by impedance spectroscopy of the electrode modified (PANI+TiO2)/A304 - Morphological characterizaton of the steel, PANI, and composite films by SEM - Chemical analysis of the composites by EDX |
| DOI : |
10.1007/s11998-014-9611-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9611-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23211 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 1 (01/2015) . - p. 107-120
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