A Characteristic Investigation of Aminocyclohexane-N′-methylurea as a Corrosion Inhibitor for Mild Steel in 1 N H₂SO₄

Table 1

Inhibition efficiency of ACMU on mild steel corrosion in 1 N H₂SO₄ at 303 K for various time intervals.

Concentration of inhibitor (N)	1 hr			3 hrs			5 hrs
	Corrosion rate; (mmpy)	Surface coverage; (θ)	Inhibition efficiency; (%)	Corrosion rate; (mmpy)	Surface coverage; (θ)	Inhibition efficiency; (%)	Corrosion rate; (mmpy)	Surface coverage; (θ)	Inhibition efficiency; (%)
Blank	20.061	—	—	21.770	—	—	22.736	—	—
0.001	8.470	0.5778	57.78	5.944	0.7270	72.70	4.636	0.7961	79.61
0.005	6.687	0.6667	66.67	5.052	0.7679	76.79	3.789	0.8333	83.33
0.010	5.795	0.7111	71.11	4.235	0.8055	80.55	3.210	0.8588	85.88
0.015	4.235	0.7889	78.89	3.641	0.8328	83.28	2.407	0.8941	89.41
0.020	3.121	0.8444	84.44	2.898	0.8669	86.69	1.649	0.9275	92.75