Cynodon dactylon L. extract as an eco-friendly corrosion inhibitor of mild steel in saline solution

Corrosion-induced loss of metal integrity is a serious industrial concern. One of the most reliable and cost-effective corrosion reduction solutions is corrosion inhibitor innovation. The aim of this investigation therefore, is to study the corrosion inhibition of Cynodon dactylon L (Bermuda grass) extract on mild steel in a 3.5% NaCl solution. The plant was extracted with 80% ethanol and different concentrations were tested at a temperature range of 30 to 60OC and for various immersion time ranging from 4 to 72 hours using gravimetric (Weight Loss) method. The results showed that Cynodon dactylon extract exhibited strong corrosion inhibition efficiency (97.78%.). The inhibition efficiency of the Cynodon dactylon extract increased with an increase of extract concentration and through the immersion periods but decreased with an increase of the temperature. The inhibitive effect could be attributed to the presence of some phytochemical compounds in the plant which were adsorbed on the surface of the mild steel.