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. 2013 May 7;7(1):83.
doi: 10.1186/1752-153X-7-83.

Investigation of ginkgo biloba leave extracts as corrosion and Oil field microorganism inhibitors

Gang Chen  1 , Min Zhang, Jingrui Zhao, Rui Zhou, Zuchao Meng, Jie Zhang
Affiliations

Investigation of ginkgo biloba leave extracts as corrosion and Oil field microorganism inhibitors

Gang Chen et al. Chem Cent J. .

Abstract

Ginkgo biloba (Ginkgoaceae), originating from China, now distributes all over the world. Wide application of Ginkgo biloba extracts is determined by the main active substances, flavonoids and terpenoids, which indicates its extracts suitable to be used as an effective corrosion inhibitor. The extracts of Ginkgo biloba leave have been investigated on the corrosion inhibition of Q235A steel with weight loss and potentiodynamic polarisation techniques. The inhibition efficiency of the extracts varies with extract concentration. The extracts inhibit corrosion mainly by adsorption mechanism. Potentiodynamic polarisation studies show that extracts are mixed type inhibitors. The antibacterial activity of the extracts against oil field microorganism (SRB, IB and TGB) was also investigated.

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Figures

Figure 1
Figure 1
Structures of flavonoids and terpenoids found in Ginkgo biloba.
Figure 2
Figure 2
The inhibition efficiency and corrosion rate of WE.
Figure 3
Figure 3
The inhibition efficiency and corrosion rate of AE.
Figure 4
Figure 4
Typical polarization curves for corrosion of Q235A steel in 1M HCl in the absence and presence of different concentrations of WE.
Figure 5
Figure 5
Typical polarization curves for corrosion of Q235A steel in 1M HCl in the absence and presence of different concentrations of AE.
Figure 6
Figure 6
The steady conformation of Quercetin and Ginkgolide A.
Figure 7
Figure 7
The absorption of Quercetin on the steel surface by coordination.
Figure 8
Figure 8
The oxidation of Quercetin by O2.
Figure 9
Figure 9
Mechanism of the microbial corrosion of oil pipelines.
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