International Scholarly Research Notices / 2013 / Article / Tab 2

Research Article

Corrosion Inhibition and Adsorption Properties of Ethanolic Extract of Calotropis for Corrosion of Aluminium in Acidic Media

Table 2

Mass loss data for aluminium in 0.5 N sulfuric acid with ethanolic extract of leaves, latex, and fruit of Calotropis gigantea.

Inhibitor concentrationMass loss (gm)
Inhibition efficiency (%)Corrosion rate (mmpy)Surface coverage (θ)

Uninhibited184033.1
Leaves
 0.12102344.4018.40.4440
 0.2485153.7315.30.5373
 0.3663465.5411.40.6554
 0.4846574.728.380.7472
 0.6032782.225.890.8222
Latex
 0.1295148.3117.10.4831
 0.2483354.7215.00.5472
 0.3662765.9211.30.6592
 0.4844275.977.960.7597
 0.6031682.825.690.8282
Fruit
 0.12104443.2618.80.4326
 0.2487552.4415.70.5244
 0.3665364.5111.70.6451
 0.4848273.808.680.7380
 0.6031982.665.740.8266