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Corrosion protective performance of epoxy-amino branched polydimethylsiloxane hybrid coatings on carbon steel

Rami Mohammad Suleiman (Center of Research Excellence in Corrosion, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, Saudi Arabia)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 28 October 2014

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Abstract

Purpose

The purpose of this work was to prepare a hybrid organic/inorganic coating with interesting barrier properties against the corrosion of plain carbon steel sheets in 3.5 per cent NaCl solution. The search for replacing chromates in protective coatings has led to the development of hybrid sol-gel anticorrosive coatings. Appropriate functionalization can dramatically enhance the chemical durability and mechanical strength of these coatings.

Design/methodology/approach

To prepare the targeted coating, 1,2-epoxybutane (EB) was mixed with 2-4 per cent aminoethylaminopropyl-methylsiloxane dimethylsiloxane copolymer and 1,6-diaminohexane. The above coating (EBAC) was further mixed with three different corrosion inhibitors “Moly-white® 101-ED, Hfucophos Zapp®” and Cerium Ammonium Nitrate, yielding the coatings (EBAC-M), (EBAC-Z) and (EABC-Ce), respectively. The corrosion characteristics of all coatings on carbon steel panels immersed in 3.5 per cent NaCl solution were obtained using different electrochemical methods such as electrochemical impedance spectroscopic and Tafel polarization measurements.

Findings

The newly prepared coatings showed interesting properties for protecting the steel substrate against corrosion in chloride containing media.

Originality/value

The results provide a good approach for the modification of polydimethylsiloxane coatings using a simple organic modifier.

Keywords

Acknowledgements

The author would like to thank KFUPM University and CORE-C for providing all support to this work. Deep thanks are also extended to Dr Bassam El Ali for providing author with the inhibitors and to Mr Nabil Alfaifi for his efforts in running the SEM analyses.

Citation

Mohammad Suleiman, R. (2014), "Corrosion protective performance of epoxy-amino branched polydimethylsiloxane hybrid coatings on carbon steel", Anti-Corrosion Methods and Materials, Vol. 61 No. 6, pp. 423-430. https://doi.org/10.1108/ACMM-08-2013-1296

Publisher

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Emerald Group Publishing Limited

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