Undec-10-ene-1-thiol multifunctional molecular layer as a junction between metallic zinc and polymer coatings on steel

The present work provides the formation of a new duplex system by combination of different layers on steel. Electrodeposition of zinc coating is performed as a first step and serves as a platform for molecular self-assembly and polymer coatings. Undec-10-ene-1-thiol molecule is used as layer junction between zinc surface and the polydimethylsiloxane (PDMS) film. Thiol function interacts by chemisorption with Zn surface while the terminal double bond takes place in the hydrosylilation reaction and thus increases the adhesion of PDMS to the zinc coating. Improvement of corrosion inhibition is evaluated by electrochemical methods at each stage of modification and particularly for the multilayer coating.