American Journal of Innovative Research & Applied Sciences
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1. Laboratory of Organic, Organometallic and Theoretical Chemistry | Faculty of Science | University IbnTofail BP. 133-14000, Kenitra | Morocco | 2. Laboratory of Materials Engineering and Environment: Modeling and Application, Faculty of Science | University IbnTofail BP. 133-14000, Kenitra | | Morocco | 3. Laboratory of materials, electrochemistry and environment | Faculty of Science, IbnTofail University | PB 133-14050 Kénitra | Morocco |
ABSTRACT Background:Metallic ions such as nickel are essential elements present in many species (proteins..). However, an excess of these ions in the human body can seriously affect our health. Furthermore, Nickel (II) is capable of reacting with mono-, bi- and polydentate ligands to form complex compounds with various applications (environmental, biological and medical). The aims : we present in this paper the synthesis and the characterization of nickel (II) complex using alanine as ligand, after that the ligand and the obtained complex were tested in the environment field as anticorrosive agents.Material and methods:the complexation of alanine with anhydrous nickel chloride was studied. The isolated complex Ni(ala)2Cl2 with a yield equal to 82% was characterized by the UV-visible spectroscopy, the infrared spectroscopy and the scanning electron microscopy (SEM) energy dispersive X-ray (EDX) analysis. The synthesized complex Ni(ala)2Cl2 and the ligand alanine on the corrosion of ordinary steel in 1M HCl solution was then evaluated by means of stationary and transient electrochemical methods (stationary and transient). A comparative study of their anticorrosive activities was also performed. Conclusion: The complex Ni(ala)2Cl2 synthesis was found to be possessing highest inhibitory effect with 95% at 10-3M. The results obtained showed that the dissolution rate of the metal depends on the molecular structure and the concentration of product. Keywords:DL-α-alanine, complexation, Ni(ala)2Cl2, corrosion, inhibitor .
