Marine anticorrosion and antifouling assessment of multifunctionalized hybrid sol-gel coatings

Rami Suleiman*, Amjad Khalil, Mazen Khaled, Bassam El Ali

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


The corrosion and fouling of steel surfaces are major problems affecting the infrastructure of most industries, especially the oil and gas industries. The application of barrier coatings is one of the most widely used methods for mitigating these metal-loss causing problems. In particular, multifunctional hybrid sol-gel coatings are a very promising alternative to the currently used commercial toxic anticorrosion/antifouling coatings. This study describes the functionalization of a hybrid sol-gel polymeric coating with MOLY(1) or ZAPP(2) corrosion inhibitors and viable endospores of Bacillus licheniformis isolate (B6). The resulting functionalized coatings were applied to S36 grade mild steel substrate and their corrosion protection properties have been evaluated in the lab using electrochemical impedance spectroscopy (EIS) technique as well as scanning electron microscopy and visual observations. The field testing of the anticorrosion and antifouling properties of all coatings was also conducted by the in-situ exposure of the coated panels to seawater at a marine exposure site. Both lab and field testing results of all coated samples indicated that the biotic systems (containing bacterial spores) inhibited corrosion and fouling more than the abiotic (without bacterial spores) ones due to varying adhesion, barrier and antimicrobial properties of these coatings. It revealed also that abiotic and biotic coatings doped with Moly inhibitor have demonstrated excellent corrosion and fouling inhibition properties comparing to ZAPP coatings and the Corro(3) commercial coating.

Original languageEnglish
Title of host publicationCorrosion Conference and Expo 2018
PublisherNational Assoc. of Corrosion Engineers International
ISBN (Print)9781510864405
StatePublished - 2018

Publication series

NameNACE - International Corrosion Conference Series
ISSN (Print)0361-4409

Bibliographical note

Publisher Copyright:
© 2018 by NACE International.


  • Anticorrosive pigments
  • Fouling
  • Mild steel
  • Protective bacterium
  • Sol-gel

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science


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