Synthesis of a novel polymeric corrosion inhibitor and investigation of its improvement by the addition of a ceramic powder extracted from corn cob

Document Type : Reasearch Paper

Authors

• Z. Sharifi ¹
• M. Pakshir ¹
• F. Ghofrani ¹
• S. Babamohammadi ²

¹ Department of Material Engineering, Shiraz University, Shiraz, Iran

² Department of Chemistry, Shiraz University, Shiraz, Iran.

10.7508/ijnd.2014.03.003

Abstract

A new anti-corrosion compound, Melamine Formaldehyde (MF), was formulated by the addition of proper amount of formaldehyde to melamine under specific conditions. This compound was mixed with a novel nano powder, which was extracted from corn cob ash containing SiO₂ particles, in order to improve its corrosion inhibition efficiency. This inhibitor provides a high level of protection for steel subjected to saline environments. The synthesized inhibitor works immediately with forming a dense protective layer and after adding the nano powder, its inhibition efficiency is improved. The electrochemical standard corrosion tests and the surface examination, using Scanning Electron Microscope (SEM) of steel specimen immersed in 3.5%Wt NaCl solutions with and without any inhibitor at room temperature, were carried out to investigate the inhibition behavior of the synthesized inhibitor. All of the results, which include the corrosion and electrochemical testing data, show that the tested corrosion inhibitor is generally effective and its efficiency gets better by adding the ceramic powder.

Keywords

• Corrosion inhibitors
• Electrolyte
• Concentration
• Chemical nature
• Film forming corrosion inhibitor
• Corn cob ash

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