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Study on an elaborated method to improve corrosion resistance of zinc phosphate coating / L. Fathyunes in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)
[article]
Titre : Study on an elaborated method to improve corrosion resistance of zinc phosphate coating Type de document : texte imprimé Auteurs : L. Fathyunes, Auteur ; M. Azadbeh, Auteur ; M. Tamhaei, Auteur ; S. O. R. Sheykholeslami, Auteur Année de publication : 2017 Article en page(s) : p. 709-720 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Adhésion
Anticorrosifs
Anticorrosion
Phosphate de zinc
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Coating with dense and fine particles containing fewer cracks and lower porosity shows more improved protective properties due to limiting pathways between the environment and base metal. The main aim of present research is to introduce an innovative method that is called rephosphating to achieve this morphology. The outstanding point of the present investigation is to highlight the significant effect of surface pretreatment by secondary grinding of phosphated surface and then rephosphating of this surface to obtain a coating with appropriate properties. The SEM observations showed that this method has an obvious influence on the formation of a very uniform zinc phosphate coating on the plain carbon steel compared with the traditional method of phosphating. Furthermore, the protecting properties of phosphated and rephosphated samples were described and compared using the neutral salt spray and the electrochemical polarization tests. The results showed that rephosphating method had a beneficial effect on improving the corrosion resistance. As well, improved paint adhesion of rephosphated sample was observed compared with that of the phosphated sample. Finally, it was concluded that when rephosphating method can be used to repair damaged phosphated areas, the coating with more compact morphology and improved properties can be achieved. Note de contenu : - The morphology and crystal structure of phosphate coating
- Results of exposure time optimization
- Corrosion protective properties of the produced coatings
- Influence of phosphate coatings on the paint adhesionDOI : 10.1007/s11998-016-9890-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9890-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28579
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 3 (05/2017) . - p. 709-720[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18899 - Périodique Bibliothèque principale Documentaires Disponible The influence of dissolved ozone in a phosphate bath on phosphate coatings on carbon steel / Minqi Sheng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)
[article]
Titre : The influence of dissolved ozone in a phosphate bath on phosphate coatings on carbon steel Type de document : texte imprimé Auteurs : Minqi Sheng, Auteur ; Yinyin Wei, Auteur ; Qindong Zhong, Auteur Année de publication : 2009 Article en page(s) : p. 543-547 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Dissolution (chimie)
Métaux -- Revêtements protecteurs
Ozone
Phosphate de zincIndex. décimale : 667.9 Revêtements et enduits Résumé : The influence of dissolved ozone (O3) and its concentrations on the formation of phosphate coatings on carbon steel in phosphate bath, as well as the protective properties of phosphate coatings in a 5 wt% NaCl solution have been studied. The structure, surface morphologies, and phase compositions of the phosphate coating on the carbon steel substrate was investigated by SEM, XRD. It is shown that the phosphate coating became more dense with fewer microholes and an increasing concentration of ozone in phosphate bath in the range of 0.0 to 1.62 mg/L. The coating compositions were Zn3(PO4)2 · 4H2O (hopeite) and Zn2Fe(PO4)2 · 4H2O. Potentiodynamic polarization and immersion tests were used to evaluate the corrosion properties of the treated samples. The coating showed good corrosion resistance properties. DOI : 10.1007/s11998-008-9159-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9159-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7719
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Code-barres Cote Support Localisation Section Disponibilité 011845 - Périodique Bibliothèque principale Documentaires Disponible Waterborne corrosion-resistant hydrophobic alkyd resin composite coatings modified with fluorinated acrylate–siloxane and submicron-sheet zinc phosphate pigment / Shenjie Zhong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
[article]
Titre : Waterborne corrosion-resistant hydrophobic alkyd resin composite coatings modified with fluorinated acrylate–siloxane and submicron-sheet zinc phosphate pigment Type de document : texte imprimé Auteurs : Shenjie Zhong, Auteur ; Kang Qin, Auteur ; Yi Hou, Auteur ; Tianqi Xu, Auteur ; Ying Cai, Auteur ; Lingmin Yi, Auteur Année de publication : 2021 Article en page(s) : p. 1309-1320 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Hydrophobie
Phosphate de zinc
Pigments organiques
Polyalkydes
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne polymeric coating for corrosion protection has been of particular interest both in academia and industrial circles for years because of its low cost and low-volatile organic compound (VOC) emissions. However, organic coating is permeable to water and oxygen resulting in the reduction of anticorrosion properties during coating application. In this study, waterborne corrosion-resistant hydrophobic-modified alkyd resin composite coatings using fluorinated acrylate–siloxane (FASAR) and submicron-sheet zinc phosphate (Zn3(PO4)2) pigment were prepared. The results of hydrophobicity, thermal, and mechanical measurements indicated that the FASAR30/5%Zn3(PO4)2 had excellent performance. More importantly, the EIS and potentiodynamic polarization tests revealed that the acquired films also exhibited high anticorrosion property for carbon steel. The corrosion current density (icorr) was 7.20 × 10−7 A cm−2, with an inhibition efficiency of 99.92%, and a corrosion rate of 8.37 × 10−3 mm per year. On the other hand, the impedance modulus (Zf = 0.01 Hz) of FASAR30/5%Zn3(PO4)2 still had 5.68 × 104 Ω cm2 after 14-day immersion in the 3.5 wt% NaCl solution. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of FASAR via emulsions miniemulsion polymerization - Preparation of waterborne FASAR and FASAR/submicron-sheet Zn3(PO4)2 composite latex films - Coating process for carbon steel
- CHARACTERIZATIONS : Morphology and size distribution of emulsion - Chemical structure of hybrid composite films - Wettability of the composite latex films - Mechanical property tests and thermal stability of composite latex films - Anticorrosion tests of composite latex films
- RESULTS AND DISCUSSION : The morphology and sizes of FASAR emulsions - FTIR analysis - Dispersion of Zn3(PO4)2 in the composite latex films - Hydrophobicity of composite latex films - Mechanical and thermal properties of composite latex films - The corrosion properties of composite latex films
- Table 1 : Recipes and properties of the FASAR emulsions
- Table 2 : Contact angle values and surface energies of the thin films of composite latexes
- Table 3 : The mechanical properties of composite latex films
- Table 4 : TGA data of the composite latex films
- Table 5 : Electrochemical parameters obtained from PDP studies for FASAR0, FASAR30 and FASAR30/submicron-sheet Zn3(PO4)2 coated CS in 3.5 wt% NaCl at room temperature
- Table 6 : Electrochemical impedance spectroscopy data for uncoated FASAR0, FASAR30 and FASAR30/submicron-sheet Zn3(PO4)2-coated CS in 3.5 wt% NaCl at room temperatureDOI : https://doi.org/10.1007/s11998-021-00493-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00493-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36434
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Code-barres Cote Support Localisation Section Disponibilité 22991 - Périodique Bibliothèque principale Documentaires Disponible