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Please use this identifier to cite or link to this item: http://http://dspace.futminna.edu.ng/jspui/handle/1/4486

Title: THE EFFECT OF IMMERSION TIME ON THE CORROSION PROTECTION PERFORMANCE OF MILD STEEL BY 3-MERCAPTOPROPYLTRIMETHOXYSILANE SOL-GEL COATING
Authors: Abubakar, Mohammed
Nayef M, Alanazi
Heming, Wang
Keywords: 3-Mercaptopropyltrimethoxysilane (MPTMS)
Sol-gel coating
EIS
immersion time
Issue Date: 21-Oct-2015
Abstract: Corrosion protection can be achieved by depositing a barrier layer such as coating, to prevent the material from coming in contact with the corrosive environment. Sol-gel coatings offer a number of advantages over other methods of protection for metallic materials. 3-mercaptopropyltrimethoxysilane (MPTMS) was used as the precursor for sol-gel coating on mild steel substrate. The effect of immersion time on the coating performance was assessed by Tafel analysis, visual inspection and electrochemical impedance spectroscopy (EIS) in aerated 3.5 wt.%NaCl solution at ambient temperature for 72 h. The electrochemical test of MPTMS coating on mild steel showed that though mild steel was protected by the coating due to coating acting as a barrier to the electrolyte by impeding its contact with the metal surface, the degradation ofthe coating is due to the presence of pores in the coating. Tafel plots revealed that MPTMS sol-gel coating has a porosity of 0.0861 %. Micrograph showed that the pits initiated did not propagate.
URI: http://http://dspace.futminna.edu.ng/jspui/handle/1/4486
Appears in Collections:IEC 2015

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