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The layer\u2010by\u2010layer assembled polyelectrolyte film with the entrapped corrosion inhibitor is constructed by sequential spray\u2010coating deposition of water solutions of poly(ethyleneimine), poly(sodium styrenesulfonate) and 8\u2010hydroxyquiniline on the top of the sol\u2010gel coating. The active corrosion protection of AA2024 alloy coated with SiO<jats:sub>2<\/jats:sub>\/ZrO<jats:sub>2<\/jats:sub> sol\u2010gel film and modified by polyelectrolytes is demonstrated by electrochemical impedance spectroscopy and scanning vibrating electrode technique. The results obtained here show that polyelectrolyte films deposited atop of the hybrid sol\u2010gel coating on AA2024 alloy remarkably improve the long\u2010term protection performance providing additional \u201cintelligent\u201d anticorrosion effect that results from delivery of inhibiting species \u201con demand\u201d. This becomes possible since the configuration of the polyelectrolyte molecules depends on the presence of H<jats:sup>+<\/jats:sup> ions making the polyelectrolyte film sensitive to the pH of the surrounding solution. The source of local pH changes is the corrosion process starting in the micro\u2010 and nano\u2010defects leading to increased permeability of the polyelectrolyte reservoir and, consequently, to controllable release of entrapped inhibitor.<\/jats:p>","DOI":"10.1002\/adfm.200800630","type":"journal-article","created":{"date-parts":[[2008,10,6]],"date-time":"2008-10-06T06:45:28Z","timestamp":1223275528000},"page":"3137-3147","source":"Crossref","is-referenced-by-count":126,"title":["Sol\u2010Gel\/Polyelectrolyte Active Corrosion Protection System"],"prefix":"10.1002","volume":"18","author":[{"given":"Svetlana V.","family":"Lamaka","sequence":"first","affiliation":[]},{"given":"Dmitry G.","family":"Shchukin","sequence":"additional","affiliation":[]},{"given":"Daria V.","family":"Andreeva","sequence":"additional","affiliation":[]},{"given":"Mikhail L.","family":"Zheludkevich","sequence":"additional","affiliation":[]},{"given":"Helmuth","family":"M\u00f6hwald","sequence":"additional","affiliation":[]},{"given":"Mario G. 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