In the light of an atomic force microscope, the morphology information of the surface of carbon steel after obsession for day in 1 M HCl solution without and with 300 ppm of Eruca sativa seeds extract were investigated.

Samples	S q (nm)	S a (nm)	Maximum peak-to-valley height (nm)
Polished carbon steel	24.792	20.628	137.07
Carbon steel in 1 M HCl	590.07	497.92	3932
Carbon steel + 1 M HCl + 300 ppm extract	175.19	145.22	4145.3