S Shanmugapriya[a], S Rajendran [b], P Prabhakar [c], R Joseph Rathish[d],
A.Christy Catherine Mary[e], Rathi Devi[e]
[a]Department of Chemistry , Madha Engineering College, Kundrathur, Chennai, India.
[b] Corrosion Research Center ,Department of Chemistry, RVS School Of Engineering and
Technology, Dindigul – 624 0 05,Tamil Nadu, India, Email:email@example.com
[c] Department of Chemistry, APA College of Arts and Culture, Palani, India.
[d] PSNA College of Engineering and Technology, Dindigul, India
[e] Department of Chemistry , St. Antony’s College of Arts and Science for Women ,
Thamarai Paddi, Tamil Nadu, India. Email:firstname.lastname@example.org.
Corrosion resistance of mild steel immersed in Simulated Concrete Pore Solution (SCPS) prepared in well water in the absence and presence of inhibitor , namely, an aqueous extract of turmeric powder has been evaluated by weight loss method. Influence of turmeric powder extract on the corrosion resistance of mild steel has been evaluated. When the extract was added, initially the corrosion resistance decreased. But after wards as the concentration of the extractincreases, the corrosion resistance also increases. The mechanistic aspects of corrosion inhibition have been studied by polarization study. In presence of turmeric extract, the linear polarization resistance value increases and the corrosion current value decreases. Corrosion current is a measure off corrosion rate. Corrosion rate decreases in presence of the extract. This extract functions as mixed type of inhibitor. Adsorption inhibitor molecules on the metal surface obeys Langmuir adsorption isotherm.
Keywords: concrete corrosion, simulated concrete pore solution, curcumin inhibitor, green
inhibitor, adsorption isotherm.