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Novel anti-corrosion coatings on steel. / Andrew Richard Bennett

Swansea University Author: Andrew Richard Bennett

Abstract

The primary objective of the work detailed in this thesis was to further explore the inhibitory performance of polyaniline for the prevention of corrosion-driven cathodic disbondment on steels and zinc-alloy coated steels. Polyaniline was investigated under atmospheric conditions so as to make possi...

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Published: 2009
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
URI: https://cronfa.swan.ac.uk/Record/cronfa42310
first_indexed 2018-08-02T18:54:24Z
last_indexed 2018-08-03T10:09:49Z
id cronfa42310
recordtype RisThesis
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spelling 2018-08-02T16:24:28.7761897 v2 42310 2018-08-02 Novel anti-corrosion coatings on steel. d2df80ee104716c1773b10c21d076443 NULL Andrew Richard Bennett Andrew Richard Bennett true true 2018-08-02 The primary objective of the work detailed in this thesis was to further explore the inhibitory performance of polyaniline for the prevention of corrosion-driven cathodic disbondment on steels and zinc-alloy coated steels. Polyaniline was investigated under atmospheric conditions so as to make possible further elucidation of the mechanisms by which it would provide this inhibition. Accordingly it is suggested that the positive performance of polyaniline indicated within this report, in addition to further mechanistic understanding, paves the way for industrial use of polyaniline as an inhibitor. To provide further mechanistic support to the inhibitory performance of polyaniline, polyaniline micro-films were applied to the metal substrate surfaces, allowing the visualisation of electrochemical and acid-base state changes resulting from substrate contact and corrosion. Due to industrial concerns over the current cost associated with polyaniline inhibitor pigments, the inhibitory properties of novel organic acid etch primers were explored on both iron and zinc substrates. The findings of this study led to the proposition that the presence of polyaniline may not be required within the model organic coating system in order to provide a similar level of inhibition. Alongside the investigations of inhibitory organic coating systems, attention was directed towards novel Mg-Al-Zn metallic coatings. These are shown to provide inhibition of cathodic disbondment of organic coatings where no form of in-coating inhibition is present. These alloy-coated steels were found to suffer from a novel form of corrosion and full mechanistic proposition is provided, as well as important initiation factors. Finally, the photovoltaic possibilities of polyaniline were explored in order to find novel, high value coating systems for the pre-painted steel industry. Accordingly the photovoltaic properties of polyaniline are compared to established photovoltaic polymers. E-Thesis Materials science. 31 12 2009 2009-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral EngD 2018-08-02T16:24:28.7761897 2018-08-02T16:24:28.7761897 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Andrew Richard Bennett NULL 1 0042310-02082018162444.pdf 10798018.pdf 2018-08-02T16:24:44.4070000 Output 7505219 application/pdf E-Thesis true 2018-08-02T16:24:44.4070000 false
title Novel anti-corrosion coatings on steel.
spellingShingle Novel anti-corrosion coatings on steel.
Andrew Richard Bennett
title_short Novel anti-corrosion coatings on steel.
title_full Novel anti-corrosion coatings on steel.
title_fullStr Novel anti-corrosion coatings on steel.
title_full_unstemmed Novel anti-corrosion coatings on steel.
title_sort Novel anti-corrosion coatings on steel.
author_id_str_mv d2df80ee104716c1773b10c21d076443
author_id_fullname_str_mv d2df80ee104716c1773b10c21d076443_***_Andrew Richard Bennett
author Andrew Richard Bennett
author2 Andrew Richard Bennett
format E-Thesis
publishDate 2009
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description The primary objective of the work detailed in this thesis was to further explore the inhibitory performance of polyaniline for the prevention of corrosion-driven cathodic disbondment on steels and zinc-alloy coated steels. Polyaniline was investigated under atmospheric conditions so as to make possible further elucidation of the mechanisms by which it would provide this inhibition. Accordingly it is suggested that the positive performance of polyaniline indicated within this report, in addition to further mechanistic understanding, paves the way for industrial use of polyaniline as an inhibitor. To provide further mechanistic support to the inhibitory performance of polyaniline, polyaniline micro-films were applied to the metal substrate surfaces, allowing the visualisation of electrochemical and acid-base state changes resulting from substrate contact and corrosion. Due to industrial concerns over the current cost associated with polyaniline inhibitor pigments, the inhibitory properties of novel organic acid etch primers were explored on both iron and zinc substrates. The findings of this study led to the proposition that the presence of polyaniline may not be required within the model organic coating system in order to provide a similar level of inhibition. Alongside the investigations of inhibitory organic coating systems, attention was directed towards novel Mg-Al-Zn metallic coatings. These are shown to provide inhibition of cathodic disbondment of organic coatings where no form of in-coating inhibition is present. These alloy-coated steels were found to suffer from a novel form of corrosion and full mechanistic proposition is provided, as well as important initiation factors. Finally, the photovoltaic possibilities of polyaniline were explored in order to find novel, high value coating systems for the pre-painted steel industry. Accordingly the photovoltaic properties of polyaniline are compared to established photovoltaic polymers.
published_date 2009-12-31T01:40:42Z
_version_ 1821367748188438528
score 11.04748

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