Table 3. Values of Rate of Corrosion, r_g, mg cm^–2 h^–1, Surface Coverage, θ, and the Anticorrosion Efficiency, η_w, for C-Steel in 1.0 M HCl without and with the DMAB Compound at Various Temperatures (Gravimetric Data).

	298 K			313 K			338 K
conc., mM	rg, mg cm–2 h–1	θ	ηw (%)	rg, mg cm–2 h–1	θ	ηw (%)	rg, mg cm–2 h–1	θ	ηw (%)
0.00	1.0494			2.0051			3.3874
0.05	0.2962	0.72	71.77	0.7843	0.61	60.89	1.5928	0.53	52.98
0.10	0.2596	0.75	75.26	0.6652	0.67	66.83	1.4459	0.57	57.32
0.50	0.2179	0.79	79.24	0.5635	0.72	71.90	1.2066	0.64	64.38
1.00	0.1570	0.85	85.03	0.4473	0.78	77.69	1.0098	0.70	70.19
5.00	0.0838	0.92	92.01	0.3298	0.84	83.55	0.8526	0.75	74.83