Study of the behavior of an organic coating applied on the storage reservoirs of oil in a medium of 3% NaCl solution and in marine environment

Hammouda, Nadia; Boudinar, Y.; Touiker, M.; Belmokre, K.

doi:10.1002/maco.200503912

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…[1][2][3] Organic coatings, in general, have the advantage of slowing down water, ions, and other corrosive media penetrating through the organic film. The disadvantage of most organic paints used in the industry, however, is their high volatile organic content (VOC), which is going to become more and more restricted due to environmental and legislation constraints.…”

Section: Introductionmentioning

confidence: 99%

The particle size effect of MALPB-DEA dispersions on their anticorrosion performances as waterborne coatings on galvanized sheet

Wang

Tang

2010

J Coat Technol Res

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Maleic anhydride-g-liquid polybutadiene (MALPB) dispersions were prepared by chemical modification with diethanolamine (DEA) during direct polymer emulsification, and their anticorrosion performances on galvanized sheet were found to be strongly dependent on their particle size and distribution with the variation of DEA. The dispersion containing DEA to maleic anhydride at molar ratio of 2:1 exhibited much smaller particle size and narrower size distribution than that containing DEA to maleic anhydride at molar ratio of 1:1, as measured by a laser diffraction particle size analyzer. A more compact organic layer was supposed to be formed by the dispersion composed of smaller size and narrower size distribution particles on the galvanized sheet, which exhibited better anticorrosive properties. This compact layer slowed down the electrolyte penetration onto the metal surface such that the life span of the metal could be prolonged, which was reflected in the increase in corrosion potential as measured by DC polarization, higher impedance during immersion in 3.5 wt% NaCl solution as measured by electrochemical impedance spectroscopy (EIS), and improved durability in harsh environment as observed by images after salt spray tests.

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Section: Introductionmentioning

confidence: 99%

The particle size effect of MALPB-DEA dispersions on their anticorrosion performances as waterborne coatings on galvanized sheet

Wang

Tang

2010

J Coat Technol Res

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“…Um método amplamente utilizado na proteção contra a alumínio é a formação de camadas de conversão de cromo, porém, o processo de cromatização apresenta problemas ambientais em função da utilização de banhos de eletrodeposição que contém o íon Cr O desenvolvimento de novos materiais e metodologias voltadas à proteção de superfícies metálicas contra corrosão apresenta-se como um tema de grande relevância na atualidade. As principais motivações deste interesse decorrem, dentre a necessidade de desenvolvimento de métodos de proteção [47][48][49][50] , dentre eles, o estudo de revestimentos obtidos a partir da utilização de polímeros condutores 5-8, 16, 17, 51, 52 e camadas auto-organizadas 10-13, 20, 53, 54 têm mostrado resultados promissores.…”

Section: Proteção Contra a Corrosãounclassified

Desenvolvimento de estruturas do tipo bi-camada baseadas em camadas auto-organizadas e polianilina para a proteção contra a corrosão de ligas de alumínio

Silva¹

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A method widely used in corrosion protection of aluminum alloys is the formation of conversion layers of chromium. In search of "environmentally friendly" corrosion protection methods there is the possibility of using conducting polymers such as polyaniline (PAni), which can act by barrier effect or absorbing charged particles from the solution and / or self-assembled monolayers (SAM), where protection may occur indirectly, when the SAM acts as a promoter of adhesion to other coatings, or directly, when the monolayer blocks the access of aggressive substances to the surface. This work proposes the use of bi-layers based on propyl-trimethoxy-silane (PTMS) + PAni and octadecyl-trimethoxy-silane (ODTMS) + PAni for corrosion protection of aluminum alloys AA1050, AA2024 and AA7075. For the corrosion tests were used different techniques such as: open circuit potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy. Analysis of optical microscopy and scanning electron microscopy (SEM) were performed before and after the corrosion tests in order to verify the efficiency of the proposed coatings in corrosion protection. Additionally, tests of salt spray and adhesion were made, in addition to the characterization of the alloys by SEM and X-ray dispersive energy. The results show that the treatments resulted in improvements in corrosion resistance in the following order: PTMS < ODTMS < PAni < PTMs + PAni < ODTMS + PAni. The last one gives the best results such as larger shifts of the E corr to more positive values, decrease of the i corr , fewer corrosion points after the polarization curves, higher values of total impedance in the entire range of frequency used and more resistant to the exposure to salt spray.

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Influence of various loadings of hydrophilic or hydrophobic silica nanoparticles on water uptake and porosity of a polyurethane coating

Dolatzadeh

Jalili

Moradian

2012

Materials & Corrosion

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In this paper, water uptake, porosity and corrosion behaviours of two‐pack polyurethane coatings separately loaded with two types of silica nanoparticles (i.e. hydrophilic and hydrophobic silica nanoparticles) are presented. Water uptake of such coatings was measured by the aid of electrochemical impedance spectroscopy whereas porosity of the coatings was determined according to the ASTM D 6583 standard. Transmission electron microscopy and Fourier transform infrared spectroscopy were also utilised to examine morphology and chemical structure of the nanoparticles filled coatings. These techniques show that the hydrophobic SiO2 nanoparticles could be easily dispersed throughout the polyurethane matrix while negatively influence the curing process of the coatings. The results reveal that the incorporation of both hydrophilic and hydrophobic silica nanoparticles into the polyurethane matrix, generally, reduces the percent porosity of the resultant coatings. However, obtained results show that the type and content of silica nanoparticles influence the capacitance and therefore water uptake of the coatings to various extents.

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Study of the behavior of an organic coating applied on the storage reservoirs of oil in a medium of 3% NaCl solution and in marine environment

Cited by 4 publications

References 12 publications

The particle size effect of MALPB-DEA dispersions on their anticorrosion performances as waterborne coatings on galvanized sheet

The particle size effect of MALPB-DEA dispersions on their anticorrosion performances as waterborne coatings on galvanized sheet

Desenvolvimento de estruturas do tipo bi-camada baseadas em camadas auto-organizadas e polianilina para a proteção contra a corrosão de ligas de alumínio

Influence of various loadings of hydrophilic or hydrophobic silica nanoparticles on water uptake and porosity of a polyurethane coating

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