TY - JOUR
T1 - Study of curcuma xanthorrhiza extract as green inhibitor for API 5L X42 steel in 1M HCl solution
AU - Soedarsono, Johny Wahyuadi
AU - Shihab, Muhammad Nafies
AU - Azmi, Muhammad Fikri
AU - Maksum, Ahmad
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/1/25
Y1 - 2018/1/25
N2 - The inhibitory effects of Curcuma xanthorrhiza extract on the corrosion of API 5L X42 steel in 1M HCl solution was investigated by using weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy methods. In this study the concentration of C. xanthorrhiza extract used was 100, 250, 500, and 1000 ppm. The results show that C. xanthorrhiza inhibit the steel corrosion and acted as mixed type inhibitors. The corrosion rate decreased with the increasing of inhibitors concentrations. At the same time, inhibition efficiency increased with the increase of inhibitors concentrations. The adsorption of the extract on the steel surface was found to obey Langmuir's adsorption isotherm. The free energy value (ΔGads) indicated that the adsorption of the inhibitor molecules was typical of physisorption. It can be concluded that C. xanthorrhiza extract could be used as an alternative and environmental friendly inhibitor for API 5L X42 steel in acidic environment.
AB - The inhibitory effects of Curcuma xanthorrhiza extract on the corrosion of API 5L X42 steel in 1M HCl solution was investigated by using weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy methods. In this study the concentration of C. xanthorrhiza extract used was 100, 250, 500, and 1000 ppm. The results show that C. xanthorrhiza inhibit the steel corrosion and acted as mixed type inhibitors. The corrosion rate decreased with the increasing of inhibitors concentrations. At the same time, inhibition efficiency increased with the increase of inhibitors concentrations. The adsorption of the extract on the steel surface was found to obey Langmuir's adsorption isotherm. The free energy value (ΔGads) indicated that the adsorption of the inhibitor molecules was typical of physisorption. It can be concluded that C. xanthorrhiza extract could be used as an alternative and environmental friendly inhibitor for API 5L X42 steel in acidic environment.
UR - http://www.scopus.com/inward/record.url?scp=85041660632&partnerID=8YFLogxK
U2 - 10.1088/1755-1315/105/1/012060
DO - 10.1088/1755-1315/105/1/012060
M3 - Conference article
AN - SCOPUS:85041660632
SN - 1755-1307
VL - 105
JO - IOP Conference Series: Earth and Environmental Science
JF - IOP Conference Series: Earth and Environmental Science
IS - 1
M1 - 012060
T2 - 2nd International Tropical Renewable Energy Conference, i-TREC 2017
Y2 - 3 October 2017 through 4 October 2017
ER -