A comprehensive study of grape pomace extract and its active components as effective vapour phase corrosion inhibitor of mild steel

• V. Vorobyova¹, O. Chygyrynets´¹, M. Skiba², T. Zhuk¹, І. Kurmakova³ and О. Bondar³

¹ National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Ave Peremogy 37, Kiev, 03056 Ukraine
² Ukrainian State Chemical-Engineering University, Gagarin Ave. 8, Dnipro, 49005 Ukraine
³ Chernihiv National T.G. Shevchenko Pedagogical University, 53 Hetmana Polubotka str., 14013 Chernihiv, Ukraine

Abstract: The inhibition efficiency of grape pomace extract (GPE) and its main constituents (2-phenylacetaldehyde, hexanal) as a green volatile corrosion inhibitor for the temporary protection of mild steel was investigated. Weight loss measurements and potentiodynamic polarization techniques were all used for this assessment. The major constituents of GPE were identified by GC-MS analysis. Grape pomace extract inhibited mild steel corrosion under conditions of periodic condensation of moisture with a protection efficiency of ~92%. The gravimetric measurement indicates that inhibition efficiency shows direct proportional relation with concentration of inhibitor. The corrosion rate reduction is time dependent, and the highest protection values were achieved only in 48 h. Inhibition efficiency increases in the order: grape pomace extract > 2-phenylacetaldehyde > hexanal. The grape pomace extract and main components acted as a mixed-type inhibitor with predominant cathodic effectiveness. Structural characterization by using SEM, AFM images and FT-IR analysis further supported the electrochemical and weight loss measurements results obtained.

Keywords: atmospheric corrosion, grape pomace, volatile inhibitor, 2-phenylacetaldehyde, hexanal

Int. J. Corros. Scale Inhib., 2018, 7, no. 2, 185-202 PDF (1 415 K)
doi: 10.17675/2305-6894-2018-7-2-6

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