AERVA LANATA LEAF EXTRACT AS A CORROSION INHIBITOR FOR CARBON STEEL IN CHLORIDE ENVIRONMENT

Authors

  • V. Rajesh Department of Chemistry, V. R. Siddhartha Engineering College (Autonomous), Vijayawada-520007, Andhra Pradesh, India
  • E. U. B. Reddi Department of Environmental Sciences, College of Science and Technology, Andhra University, Visakhapatnam-530003, Andhra Pradesh, India
  • T. Byragi Reddy Department of Environmental Sciences, College of Science and Technology, Andhra University, Visakhapatnam-530003, Andhra Pradesh, India
  • Ch. Durga Prasad Department of Environmental Sciences, College of Science and Technology, Andhra University, Visakhapatnam-530003, Andhra Pradesh, India
  • B. Prasanna Kumar Department of Environmental Sciences, College of Science and Technology, Andhra University, Visakhapatnam-530003, Andhra Pradesh, India

DOI:

https://doi.org/10.29121/granthaalayah.v6.i11.2018.1084

Keywords:

Corrosion Inhibitor, Aerva Lanata, Gravimetric Measurements, Leaf Extract, Environmental Factors, Carbon Steel

Abstract [English]

The present study was initiated with an objective of investigating a plant extract as an effective corrosion inhibitor useful for protection of carbon steel in aqueous environment containing chloride ions. For this purpose, the leaf extract of the plant ‘Aerva lanata’ belonging to Amaranthaceae family of genus Aerva was chosen. The required optimum concentration of the extract for an effective inhibition was found to be 5 %, resulting in the inhibition efficiency of 95 % against corrosion of carbon steel in 200 ppm of NaCl solution. The extract introduced as a corrosion inhibitor was found to be effective in the pH range from 4.0 to 9.0. The extract could retain its inhibition efficiency for about an immersion period of 60 days and also up to a temperature of 333 K. The 5 % extract was found to control corrosion of carbon steel in highly aggressive medium containing 300 ppm of NaCl also. In order to maintain the protective nature, the required concentration of the extract was 2 %. From these studies, it was inferred that the Aerva lanata leaf extract exhibits good inhibitive properties for carbon steel in aqueous environment in wide ranges of pH, temperature and aggressiveness of medium.

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Published

2018-12-31

How to Cite

V., R., Reddi, E. U. B., Reddy, T. B., Prasad, C. D., & Kumar, B. P. (2018). AERVA LANATA LEAF EXTRACT AS A CORROSION INHIBITOR FOR CARBON STEEL IN CHLORIDE ENVIRONMENT. International Journal of Research -GRANTHAALAYAH, 6(11), 153–162. https://doi.org/10.29121/granthaalayah.v6.i11.2018.1084