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Preparation of polyaniline–TiO2 composite and its comparative corrosion protection performance with polyaniline

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Title: Preparation of polyaniline–TiO2 composite and its comparative corrosion protection performance with polyaniline
Authors: Sathiyanarayanan, S.1, Syed Azim, S.1, Venkatachari, G. gvchari@gmail.com
Source: Synthetic Metals. Mar2007, Vol. 157 Issue 4/5, p205-213. 9p.
Subjects: Corrosion & anti-corrosives, Conducting polymers, Coating processes, Macromolecules
Abstract: Abstract: Due to strict environmental regulations on the usage of chromate in the coating industries, search for effective inhibitive pigment in replacing those chromate pigments has become necessary. In recent years it has been shown that electrically conducting polymers such as polyaniline (PANI) incorporated coatings are able to protect steel due to their passivating ability similar to that of chromates. This work presents the comparative corrosion protection performance of the coatings containing polyaniline and polyaniline–TiO2 composite (PTC) on steel in acrylic binder. The PANI and PTC were prepared by chemical oxidative method of aniline by ammonium persulfate. The polymers were characterized by FTIR, XRD and SEM. The corrosion protection performance of the coatings containing PANI and PTC on steel was evaluated by immersion test in 3% NaCl for 60 days and salt fog test for 35 days. The performance of the coatings in both the tests was investigated by open circuit potential measurements and EIS technique. It has been found that the open circuit potential values of PTC containing coating are more nobler by 50–200mV in comparison to that of coatings with PANI. Besides, the resistance values of the coating containing PTC were more than 107 Ωcm2 in the 3% NaCl immersion test after 60 days and 109 Ωcm2 in the salt fog test of 35 days which were two orders high in comparison to that of PANI containing coatings. The better performance of PTC containing coatings may be due to uniform distribution of polyaniline which can form uniform passive film on the iron surface. [Copyright &y& Elsevier]
Copyright of Synthetic Metals is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 25033955
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Preparation of polyaniline–TiO<subscript>2</subscript> composite and its comparative corrosion protection performance with polyaniline
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  Data: <searchLink fieldCode="AR" term="%22Sathiyanarayanan%2C+S%2E%22">Sathiyanarayanan, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Syed+Azim%2C+S%2E%22">Syed Azim, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Venkatachari%2C+G%2E%22">Venkatachari, G.</searchLink><i> gvchari@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Synthetic+Metals%22">Synthetic Metals</searchLink>. Mar2007, Vol. 157 Issue 4/5, p205-213. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Corrosion+%26+anti-corrosives%22">Corrosion & anti-corrosives</searchLink><br /><searchLink fieldCode="DE" term="%22Conducting+polymers%22">Conducting polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Coating+processes%22">Coating processes</searchLink><br /><searchLink fieldCode="DE" term="%22Macromolecules%22">Macromolecules</searchLink>
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  Label: Abstract
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  Data: Abstract: Due to strict environmental regulations on the usage of chromate in the coating industries, search for effective inhibitive pigment in replacing those chromate pigments has become necessary. In recent years it has been shown that electrically conducting polymers such as polyaniline (PANI) incorporated coatings are able to protect steel due to their passivating ability similar to that of chromates. This work presents the comparative corrosion protection performance of the coatings containing polyaniline and polyaniline–TiO2 composite (PTC) on steel in acrylic binder. The PANI and PTC were prepared by chemical oxidative method of aniline by ammonium persulfate. The polymers were characterized by FTIR, XRD and SEM. The corrosion protection performance of the coatings containing PANI and PTC on steel was evaluated by immersion test in 3% NaCl for 60 days and salt fog test for 35 days. The performance of the coatings in both the tests was investigated by open circuit potential measurements and EIS technique. It has been found that the open circuit potential values of PTC containing coating are more nobler by 50–200mV in comparison to that of coatings with PANI. Besides, the resistance values of the coating containing PTC were more than 107 Ωcm2 in the 3% NaCl immersion test after 60 days and 109 Ωcm2 in the salt fog test of 35 days which were two orders high in comparison to that of PANI containing coatings. The better performance of PTC containing coatings may be due to uniform distribution of polyaniline which can form uniform passive film on the iron surface. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Synthetic Metals is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.synthmet.2007.01.012
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      – Code: eng
        Text: English
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      – SubjectFull: Corrosion & anti-corrosives
        Type: general
      – SubjectFull: Conducting polymers
        Type: general
      – SubjectFull: Coating processes
        Type: general
      – SubjectFull: Macromolecules
        Type: general
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      – TitleFull: Preparation of polyaniline–TiO2 composite and its comparative corrosion protection performance with polyaniline
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            NameFull: Venkatachari, G.
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              Text: Mar2007
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              Y: 2007
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              Value: 4/5
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