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Abstract

A STUDY ON RETARDATION OF RUST BY CARISSA CARANDAS

C. Rajarathinam, A. Ashwin, J.K. Alphonsa Juliet Helina and A. Peter Pascal Regis*

ABSTRACT

The ethanolic extract of Carissa carandas was used on carbon steel in acidic medium for retardation of rust. The phyto constituents, antimicrobial activity were examined and GC-MS analysis was carried out for the plant extract. The retardation property of Carissa carandas was determined by weight loss method, for various concentrations of the extract with Zn2+ ion and lactic acid as additive in 0.5M HCl medium. The retarding film that protects the surface of the metal was confirmed by the spectral studies such as FT-IR, UV and fluorescence spectra. The film formation is confirmed by the surface morphology SEM analysis. It also shows the formation of complex between the metal cation, additive and the compounds present in the extract of Carissa carandas.

Keywords: Retardation, Carissa carandas, Carbon Steel, FT-IR, UV, SEM, GC-MS.


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