Corrosion Inhibition of Bronze Alloy by Jatropha Extract in Neutral Media for Application on Archaeological Bronze Artifacts

Document Type : Original Article

Authors

1 Ministry of Tourism and Antiquities

2 Faculty of Archaeology, Cairo University

3 Central metallurgical research and development institute

Abstract

Corrosion is a predominant problem for the different materials. Various methods have been utilized to prevent this phenomenon; some routes have been caused great environmental effects, and are harmful to humans. Recently, green corrosion inhibitors have been used to overcome this problem. This paper discusses the corrosion inhibition behavior of bronze in 3.5% NaCl solution in the absence and presence of Jatropha extract as a green corrosion inhibitor. Bronze coupons were made based on the chemical composition of cast bronze alloys used in archaeological artifacts. The influence of inhibitor concentration and operating temperature on the inhibition efficiency was studied using weight loss, electrochemical techniques, salt spray, and colorimetric measurements. The results showed that Jatropha extract could serve as an effective inhibitor in 3.5% NaCl. The inhibition efficiency (IE%) increases with an increase in inhibitor’s concentration but decreases with temperature rise. The highest inhibition efficiency was 90.36 % at 30 ppm of Jatropha and at room temperature (~25 °C). The inhibition is attributed to the physical absorption of the inhibitor on the surface of the bronze alloy. Finally, based on the findings of this study, jatropha extract is highly recommended for use as a green corrosion inhibitor for archaeological artifacts.

Keywords

Egyptian Journal of Chemistry
Volume 65, Issue 132 - Serial Number 13
Special Issue: Chemistry and Global Challenges (Part B)
December 2022
Pages 869-878

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History

  • Receive Date: 28 July 2022
  • Revise Date: 21 August 2022
  • Accept Date: 04 September 2022

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