Tuesday, 25 October 2016

Phytochemical profile and corrosion inhibitive behaviour of Culcasia scandens leaf extract as organic inhibitor of mild steel in Trioxonitrate V acid solution

The effect of Culcasia scandens leaf extract on the corrosion of mild steel in 2 M HNO3 solution was studied using weight loss or gravimetric technique at 303K, 323K and 343K for 30 minutes.

Culcasia scandens leaf extract
The Culcasia scandens leaf extract inhibited the corrosion of mild steel in 2 M HNO3 solution. The inhibition efficiency increased with the concentration of the extract and temperature rise. The inhibition is attributed to the adsorption of the extract on the surface of the mild steel coupon.

The corrosion rate, degree of surface coverage θ increased with increase in the inhibitor concentration and temperature. The increase in the degree of surface coverage with rise in temperature suggests that strong chemical bond exist between the extracts and the adsorbent.

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