Caesalpinia pulcherrima  as Corrosion Inhibitor for Mild Steel in Acid Medium

C. V. Deepaa; V. G. Vasudha; T. Sathiyapriya

Caesalpinia pulcherrima as Corrosion Inhibitor for Mild Steel in Acid Medium

C. V. Deepaa ¹, V. G. Vasudha ², T. Sathiyapriya ¹

Affiliations
1 Department of Chemistry, Govt. Arts College, Coimbatore, Tamilnadu-641018, India
2 Department of Chemistry, Nirmala College, Coimbatore, Tamilnadu-641018, India

The inhibition efficacy of the extract of Caesalpinia pulcherrima for the corrosion of mild steel in 1N hydrochloric acid was investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM) techniques. The results indicate that CP flowers serve as a good corrosion inhibitor of mixed type with efficiency as high as 95% at 0.6% inhibitor concentration.