Research on Anticorrosive Effects of Larch Bark Extract with Addition of Collagen

Abstract:

The results of the study of the anticorrosive protective effects of the larch bark extract with addition of collagen have been given in this article. It was found that the best way of water extraction of tannins from larch bark is a temperature of 60 ° C during 1 hour, since at high temperatures, partial destruction of tannins occurs, and with an increase in the extraction time of more than an hour, the process of adsorption of these substances by the bark takes place. The corrosion rate was determined by the intensity of the blue colour of the complex compound of iron (II) cations - the truncul blue Fe₃[Fe (CN)₆]₂ on a photocolorimeter with a yellow light filter at a wavelength of 590 nm. The average corrosion rate was calculated by the concentration of the resulting Fe²⁺ cations (within 1 minute). Based on the average corrosion rates, the protective effect of the extract (Z) and the drag coefficient (γ) were determined. It has been identified that the protective effect of the larch bark extract is equal to 37.5%, while addition of collagen leads to 2.3 time increase of protective effects of the extract. This can be explained by the fact that, with collagen additive, good adhesion of tannins to the surface of iron occurs resulting from formation of complex compounds, and a protective collagen film is formed, preventing an access of oxidizing agents to the metal surface.

• Periodical: Materials Science Forum (Volume 992)
• Pages: 718-723
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.992.718
• Online since: May 2020
• Authors: I.E. Kuzmina*, A.I. Fedorova
• Keywords: Anti-Corrosive Effects, Collagen Additive, Larch Bark, Tannin

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