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51313-02238-Characterization of a Water-Based PVDC Primer with EIS

Product Number: 51313-02238-SG
ISBN: 02238 2013 CP
Author: Xiaoning Qi
Publication Date: 2013
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Polymer films formed on steel with water-based coating binders often have lower impedance than their solvent-borne counterparts. Additions of other components for ease of processing lower cost and other additional functionality make their impedance even lower. The lower impedance in connection with high water permeability and ion conductivity indicates the proneness of a coating to blister and delaminate from a substrate. As an effort to reduce the number of and finally eliminate these defects from a commercial poly vinylidene chloride (PVDC) primer a systematic EIS study had been conducted on films formed with incremental components from just the binder resin to a full commercial formulation. Binder resins were found determining the inherent/initial impedance of a coating. However due to the strong interactions between binders fillers solvents and additives the final impedance of a coating after immersion in electrolyte was found determined by its formulation and application conditions.

Polymer films formed on steel with water-based coating binders often have lower impedance than their solvent-borne counterparts. Additions of other components for ease of processing lower cost and other additional functionality make their impedance even lower. The lower impedance in connection with high water permeability and ion conductivity indicates the proneness of a coating to blister and delaminate from a substrate. As an effort to reduce the number of and finally eliminate these defects from a commercial poly vinylidene chloride (PVDC) primer a systematic EIS study had been conducted on films formed with incremental components from just the binder resin to a full commercial formulation. Binder resins were found determining the inherent/initial impedance of a coating. However due to the strong interactions between binders fillers solvents and additives the final impedance of a coating after immersion in electrolyte was found determined by its formulation and application conditions.

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