Unraveling EDTA corrosion inhibition when interleaved into Layered Double Hydroxide epoxy filler system coated onto aluminum AA 2024
作者： Thomas Stimpfling , Fabrice Leroux , Horst Hintze-Bruening , None
DOI: 10.1016/J.CLAY.2013.08.005
关键词:
摘要: Abstract To entrap a corrosion inhibitor agent into host matrix and avoid its possible weakening/plasticizing toward an organic coating as well in enabling progressive release under stimuli, Layered Double Hydroxide (LDH) framework is here selected role filler to provide barrier effect due associated aspect ratio. protect aluminum alloy AA 2024 ethylenediaminetetraacetic acid (EDTA) was chosen because of interaction with copper rich intermetallic phases. Characterization the inorganic–organic (I/O) hybrid phase confirms formation LDH-type sheets unusual high charge density. LDH/EDTA evaluated presence aggressive chloride anions compared chromate, carbonate interleaved LDH anions. The mechanism from inorganic container studied by X-ray diffraction efficiency when embarked epoxy-based characterized Electrochemical Impedance Spectroscopy (EIS) DC-Polarization experiments using Tafel plot refinements. mechanisms are discussed function EDTA/LDH action such particular conditions protection scrutinized evolving diadochy, buffering complexing reaction against electrolyte salt concentration versus exposure time. Counter intuitively deleterious released EDTA inhibiting process demonstrated, however underlining benefit platelets.
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