{"id":13832,"date":"2022-06-19T14:44:50","date_gmt":"2022-06-19T12:44:50","guid":{"rendered":"https:\/\/www.ummto.dz\/fs\/?p=13832"},"modified":"2022-06-20T10:55:32","modified_gmt":"2022-06-20T08:55:32","slug":"avis-de-soutenance-de-these-de-doctorat-en-chimiethese-en-cotutelle-de-mlle-mameri-sonia","status":"publish","type":"post","link":"https:\/\/www.ummto.dz\/fs\/avis-de-soutenance-de-these-de-doctorat-en-chimiethese-en-cotutelle-de-mlle-mameri-sonia\/","title":{"rendered":"Avis de soutenance de th\u00e8se de Doctorat en Chimie(Th\u00e8se en cotutelle) de Mlle Mameri Sonia."},"content":{"rendered":"<p>[et_pb_section fb_built=\u00a0\u00bb1&Prime; _builder_version=\u00a0\u00bb4.17.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb custom_padding=\u00a0\u00bb0px|0px|0px|0px|false|false\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.17.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4&Prime; _builder_version=\u00a0\u00bb4.17.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.17.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb width=\u00a0\u00bb100%\u00a0\u00bb custom_padding=\u00a0\u00bb0px||||false|false\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; locked=\u00a0\u00bboff\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p style=\"text-align: justify\"><span style=\"color: #000000\">Mlle <strong><span style=\"color: #ff0000\">MAMERI Sonia<\/span><\/strong>.<\/span><\/p>\n<p style=\"text-align: justify\"><span style=\"color: #000000\">Soutiendra sa th<span><em>\u00e8<\/em><\/span>se de Doctorat en Chimie (th<span><em>\u00e8<\/em><\/span>se cotutelle:UMMTO-Alg\u00e9rie\/Universit\u00e9 de Reims-France) Sp\u00e9cialit\u00e9: Physico-Chimie des Materiaux<br \/><\/span><\/p>\n<p><span style=\"color: #000000\">Intitul\u00e9 <strong>\u00ab<\/strong><strong><span style=\"color: #0000ff\">Etude du comportement \u00e0 la corrosion et sous polarisation cathodique d&rsquo;aciers de canalisations<\/span>\u00bb<\/strong>.<\/span><\/p>\n<p><strong><\/strong><strong>Le\u00a0: <span style=\"color: #ff0000\">12 Juillet 2022 <\/span><\/strong><span style=\"color: #000000\">\u00e0 la salle de visioconf\u00e9rences du Centre des Syst\u00e8mes et R\u00e9seaux de l\u2019Universit\u00e9\u00a0 Mouloud Mammeri de Tizi-Ouzou \u00e0 <strong><span style=\"color: #ff0000\">09h :00<\/span>.<\/strong><\/span><\/p>\n<p><span style=\"color: #000000\"><strong><\/strong><\/span><\/p>\n<p><span style=\"text-decoration: underline\"><strong>Devant le jury compos\u00e9 de :<\/strong><\/span><\/p>\n<p><strong><\/strong><\/p>\n<table style=\"height: 120px;width: 366px;border-style: solid;background-color: #36d1a3\" border=\"black\">\n<tbody>\n<tr style=\"height: 16px\">\n<td style=\"width: 105.467px;height: 16px\"><strong>Mme Lamia Hamadou<br \/><\/strong><\/td>\n<td style=\"width: 98.9833px;height: 16px\"><strong>Professeure<\/strong><\/td>\n<td style=\"width: 124.467px;height: 16px\"><strong>UMMTO<\/strong><\/td>\n<td style=\"width: 107.6px;height: 16px\"><strong>Pr\u00e9sidente<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 30px\">\n<td style=\"width: 105.467px;height: 30px\"><strong>Mme Dalila Boughrara<\/strong><\/td>\n<td style=\"width: 98.9833px;height: 30px\"><strong>Professeur<\/strong><\/td>\n<td style=\"width: 124.467px;height: 30px\"><strong>UMMTO<\/strong><\/td>\n<td style=\"width: 107.6px;height: 30px\"><strong>Directrice de th<em>\u00e8<\/em>se<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 10px\">\n<td style=\"width: 105.467px;height: 10px\"><strong>M.Jean-Paul Chopart<br \/><\/strong><\/td>\n<td style=\"width: 98.9833px;height: 10px\"><strong>Professeur<\/strong><\/td>\n<td style=\"width: 124.467px;height: 10px\"><strong>URCA-Reims France<br \/><\/strong><\/td>\n<td style=\"width: 107.6px;height: 10px\"><strong>Co-directeur de th<em>\u00e8<\/em>se<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 16px\">\n<td style=\"width: 105.467px;height: 16px\"><strong>M.Zakaria Boumerzoug<br \/><\/strong><\/td>\n<td style=\"width: 98.9833px;height: 16px\"><strong>Professeur<\/strong><\/td>\n<td style=\"width: 124.467px;height: 16px\"><strong>Uni.Biskra<\/strong><\/td>\n<td style=\"width: 107.6px;height: 16px\"><strong>Examinateur<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 38px\">\n<td style=\"width: 105.467px;height: 38px\"><strong>M.Olivier Devos<br \/><\/strong><\/td>\n<td style=\"width: 98.9833px;height: 38px\"><strong>Professeur<\/strong><\/td>\n<td style=\"width: 124.467px;height: 38px\"><strong>Univ.Bordeaux<\/strong><strong><\/strong><\/td>\n<td style=\"width: 107.6px;height: 38px\"><strong>Examinateur<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 10px\">\n<td style=\"width: 105.467px;height: 10px\"><strong>Mme.Florica Lazar<\/strong><\/td>\n<td style=\"width: 98.9833px;height: 10px\"><strong>Ing\u00e9nieur de recherche2<br \/><\/strong><\/td>\n<td style=\"width: 124.467px;height: 10px\"><strong>URCA-Reims France<\/strong><\/td>\n<td style=\"width: 107.6px;height: 10px\"><strong>Invit\u00e9e<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify\"><span style=\"color: #000000\"><strong><\/strong><\/span><\/p>\n<p style=\"text-align: center\"><span style=\"color: #0000ff\"><strong>R\u00e9sum\u00e9:<\/strong><\/span><\/p>\n<p style=\"text-align: justify\">Ce travail consiste \u00e0 mener une \u00e9tude de la protection cathodique contre la corrosion externe des canalisations en acier dans un milieu simulant le sol (NS4). Dans une premi\u00e8re \u00e9tape, la corrosion des aciers de pipelines X52 et X60 a \u00e9t\u00e9 \u00e9valu\u00e9e au potentiel d&rsquo;abandon sous influence des param\u00e8tres du sol (temps d&rsquo;immersion, le pH et la temp\u00e9rature). Cette \u00e9tude montre que l&rsquo;acier X52 a une meilleure tenue \u00e0 la corrosion que l&rsquo;acier X60. La deuxi\u00e8me approche est l&rsquo;\u00e9tude du comportement\u00a0de l&rsquo;acier X60 sous\u00a0protection cathodique, en absence et en pr\u00e9sence d&rsquo;une perturbation par un\u00a0champ magn\u00e9tique\u00a0parall\u00e8le \u00e0 la surface de l&rsquo;\u00e9lectrode et sur des aciers pr\u00e9-corrod\u00e9s, dans des solutions simulant le sol. Diff\u00e9rentes techniques \u00e9lectrochimiques (la chronoamp\u00e9rom\u00e9trie, la spectroscopie d&rsquo;imp\u00e9dance \u00e9lectrochimique et la polarisation potentiodynamique), et caract\u00e9risation de surface (microscopie \u00e9lectronique \u00e0 balayage, spectroscopie d&rsquo;\u00e9mission X et diffraction des rayons X), ont \u00e9t\u00e9 utilis\u00e9es.\u00a0\u00a0Les r\u00e9sultats montrent\u00a0que la corrosion de l&rsquo;acier augmente dans le sol acide ou alcalin et avec la temp\u00e9rature. Les produits de corrosion form\u00e9s avec le temps d&rsquo;immersion constituent une barri\u00e8re \u00e0 la\u00a0dissolution de l&rsquo;acier.\u00a0La\u00a0solution de sol simul\u00e9\u00a0NS4 est plus corrosive que l&rsquo;extrait aqueux de sol en raison de sa forte concentration en ions.\u00a0La polarisation cathodique tout en favorisant l&rsquo;\u00e9volution de l&rsquo;hydrog\u00e8ne, fragilise et\/ou emp\u00eache la formation de d\u00e9p\u00f4ts calcaires. Le film de produits de corrosion form\u00e9s \u00e0 des potentiels plus n\u00e9gatifs est constitu\u00e9 principalement de carbonate de calcium et de compos\u00e9s de magn\u00e9sium.\u00a0L&rsquo;analyse de la r\u00e9ponse en spectroscopie d&rsquo;imp\u00e9dance complexe par des circuits \u00e9lectriques \u00e9quivalents permet de discriminer les effets des couches poreuses se formant \u00e0 la surface de l&rsquo;acier et des ph\u00e9nom\u00e8nes de diffusion de l&rsquo;oxyg\u00e8ne \u00e0 travers ces couches.\u00a0Le champ magn\u00e9tique en\u00a0influant sur la variation de la\u00a0densit\u00e9 de courant,\u00a0diminue significativement la r\u00e9sistance de transfert de charge des \u00e9chantillons quel que soit le potentiel cathodique appliqu\u00e9.\u00a0La r\u00e9sistance de polarisation des \u00e9chantillons pr\u00e9-corrod\u00e9s diminue en fonction du temps de polarisation, en fonction du temps de pr\u00e9-corrosion et \u00e9galement en fonction de la polarisation cathodique.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Mots cl\u00e9s\u00a0:<\/strong> Acier X52, Acier X60, corrosion, polarisation cathodique, solution NS4, magn\u00e9to-\u00e9lectrochimie.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\"><span style=\"color: #000000\">\u00a0<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mlle MAMERI Sonia. Soutiendra sa th\u00e8se de Doctorat en Chimie (th\u00e8se cotutelle:UMMTO-Alg\u00e9rie\/Universit\u00e9 de Reims-France) Sp\u00e9cialit\u00e9: Physico-Chimie des Materiaux Intitul\u00e9 \u00abEtude du comportement \u00e0 la corrosion et sous polarisation cathodique d&rsquo;aciers de canalisations\u00bb. Le\u00a0: 12 Juillet 2022 \u00e0 la salle de visioconf\u00e9rences du Centre des Syst\u00e8mes et R\u00e9seaux de l\u2019Universit\u00e9\u00a0 Mouloud Mammeri de Tizi-Ouzou \u00e0 09h [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":6032,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-13832","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Avis de soutenance de th\u00e8se de Doctorat en Chimie(Th\u00e8se en cotutelle) de Mlle Mameri Sonia. - Facult\u00e9 des Sciences<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ummto.dz\/fs\/avis-de-soutenance-de-these-de-doctorat-en-chimiethese-en-cotutelle-de-mlle-mameri-sonia\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Avis de soutenance de th\u00e8se de Doctorat en Chimie(Th\u00e8se en cotutelle) de Mlle Mameri Sonia. - Facult\u00e9 des Sciences\" \/>\n<meta property=\"og:description\" content=\"Mlle MAMERI Sonia. 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