UAE Neem Extract as a Corrosion Inhibitor for Carbon Steel in HCl Solution

Table 6

The Effect of concentration of the aqueous extract of Neem leaves on surface coverage for carbon steel in 1.0 M HCl at various temperatures.

		Temperature/K
	303	313	323	333	343
Concentration of Inhibitor	Surface Coverage 𝜽	Surface Coverage 𝜽	Surface Coverage 𝜽	Surface Coverage 𝜽	Surface Coverage 𝜽
1.0 M HCl + 0.02 g/L	0.43	0.34	0.22	0.08	−0.23
1.0 M HCl + 0.20 g/L	0.65	0.57	0.36	0.10	−0.18
1.0 M HCl + 0.50 g/L	0.74	0.61	0.49	0.25	−0.05
1.0 M HCl + 1.00 g/L	0.77	0.63	0.56	0.35	0.04
1.0 M HCl + 2.00 g/L	0.80	0.68	0.61	0.40	0.08