Two new Mannich bases N‐(3‐(benzo[d][1, 3]dioxol‐5‐yl(pyrrolidin‐1‐yl)methyl)‐4‐hydroxyphenyl)acetamide (I1) and N‐(3‐(benzo[d][1, 3]dioxol‐5‐yl(morpholino)methyl)‐4‐hydroxyphenyl) acetamide (I2) are synthesised and evaluated their corrosion inhibition behaviour through weight loss measurements, electrochemical, quantum chemical and surface analytical studies. Tafel studies revealed that the inhibitors are found to be mixed type. EIS studies confirmed that corrosion process is controlled through charge transfer process. The adsorption of inhibitors I1 and I2 follows Langmuir adsorption isotherm and ΔGads values suggest that both physorption and chemisorption are possible. Surface studies show that in the presence of inhibitors, smoother surface is obtained compared to blank. I1 has higher inhibition efficiency (50 μM −98%) than I2 (50 μM −94%) which is correlated with the theoretical studies.