Marjoram Extract as Corrosion Inhibitor for Dissolution of Zinc in 1.0 M HCl

Table 2

Calculated values of reaction number and percentage reduction in RN for Zn dissolution in 1.0 M HCl containing marjoram extract from thermometric method.

Extract concentration; (ppm)	Reaction number (RN); (°C min^−1)	Reduction in RN (% IE)
Blank	2.47	—
100	1.72	30.40
200	1.43	42.30
300	1.22	50.60
400	0.89	64.00
500	0.68	72.50