Inhibition of mild steel corrosion in hydrochloric acid and phosphoric acid medium using Plectranthus Amboinicus (l) plant extract
- Department of Chemistry, Mahendra Arts and Science College, Namakkal, TamilNadu.
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The extract of Plectranthus amboinicus (l) was tested as corrosion inhibitor for mild steel in 1 M HCl and H3PO4 using weight loss method at four different temperatures, viz., 308, 318, 328 and 338 K, IR and UV studies. It is evident from the results that Plectranthus amboinicus (l) effectively inhibits the corrosion in both the acids through adsorption process. The corrosion protection efficiency is increased with increase in inhibitor concentration and temperature. On comparison of both acids 6% of Plectranthus amboinicus(l) extract is found to be more effective inhibitor in Hydrochloric acid with maximum efficiency observed 97.64% at 318 K whereas for phosphoric acid the extract is effective upto 3% with maximum efficiency 81.65% at 338 K.
[S. Gomathi, V. Kumaravelan, D. Dhivya priya (2015); Inhibition of mild steel corrosion in hydrochloric acid and phosphoric acid medium using Plectranthus Amboinicus (l) plant extract Int. J. of Adv. Res. 3 (May). 1307-1315] (ISSN 2320-5407). www.journalijar.com
