کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
197343 459882 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Galvanic coupling between metal substrate and polyaniline acrylic blends: corrosion protection mechanism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Galvanic coupling between metal substrate and polyaniline acrylic blends: corrosion protection mechanism
چکیده انگلیسی

Coating strategies for corrosion protection based on intrinsically electronic conducting polymers, become an important research field mainly due to restrictions to the use of heavy metals, which are related to environmental problems. This work presents the corrosion protection behavior of different metals by using coatings based on acrylic blends formed by polyaniline and poly(methyl methacrylate). Raman spectroscopy revealed that the oxidation state of the PANI component of the blend at undamaged films, depends on the metal surface used as substrate. Results indicate that the degree of redox conversion of polyaniline, from emeraldine to leucoemeraldine state, strongly depends on the reducing power of metals showing a galvanic coupling between the substrate and polyaniline. On the other way, results reveal that PANI acts as an anion reservoir, which can release anions in a smart way when damage is produced on the surface of the coating forming a second physical barrier to avoid penetration of aggressive ions. This phenomenon was observed for all metal studied in this work.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 50, Issue 11, 1 April 2005, Pages 2213–2218
نویسندگان
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