Volume 23 Preprint 87

Experimental approach of polyphenol as an ecological corrosion inhibitor in HCl 1M for steel used in the Moroccan automotive industry

Aziz Chami, Rajaa BENABBOU, imane mehdaoui, ehhachmia ech-chihbi, rajae salim, Belkheir Hammouti, ZAKIA RAIS and Mounia Elhaji

Keywords: Polyphenol, ecological Inhibitors, steel, automotive, Corrosion

<p class="MsoBodyText" style="margin-top:.1pt;text-align:justify">This work focuses on the study of a new ecological corrosion inhibitor, namely polyphenol. The polyphenol used is extracted from vegetable waters and olive pomace, which constitute the waste of the olive industries. The extraction of olive oil generates large quantities of solid and liquid by-products, olive pomace and vegetable water. Both by-products are harmful to the environment. The study focuses on two inhibitors (polyphenol extracted from vegetable waters (MA) and polyphenol extracted from pomace (GO)). The tests are carried out on high tensile strength steel (AHLE), widely used in the automotive industry, for its mechanical characteristics and its forming properties. This study was performed using the weight loss method, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The gravimetric measurements indicate that the effectiveness of the inhibitor increases with the concentration reaching a maximum value of 96% at 10-3 M. Moreover, the electrochemical study shows that the effectiveness of the two inhibitors (MA and GO) on the HLE steel is 95.70% and 95.23% respectively.</p>

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