Utilization of secang heartwood (caesalpinia sappan l) as a green corrosion inhibitor on carbon steel (API 5L Gr. B) in 3.5% NaCl environment

2nd international Tropical Renewable Energy Conference 2017

Kaban, Erol Efraim^1 ; Maksum, Ahmad^1,2 ; Permana, Sulaksana^1 ; Soedarsono, Johny Wahyuadi^1

Center of Minerals Processing and Corrosion Research, Department of Metallurgical and Materials Engineering, Universitas Indonesia, Depok

16424, Indonesia^1

Department of Mechanical Engineering, Politeknik Negeri Jakarta, Depok

16425, Indonesia^2

关键词: Effective concentration;    Green corrosion inhibitors;    Inhibition mechanisms;    Langmuir isotherm models;    Measurement methods;    Polarization measurements;    Polarization study;    Research objectives;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/105/1/012062/pdf
DOI  :  10.1088/1755-1315/105/1/012062

来源: IOP

【 摘 要 】

This research objective was to investigate secang heartwood extract (caesalpinia sappan l) as a corrosion inhibitor on carbon steel metal (API 5L Gr B) in 3.5% NaCl environment. This research utilized polarization linier for the measurement method. Secang extract was adequate to reduce corrosion rate by 53.18% efficiency (based on polarization measurement). The most effective concentration of inhibitor secang was 2.0 ml/400 ml 3.5% NaCl. Furthermore, inhibitor efficiency of secang has tended to decrease by increasing of temperature. From polarization study, secang was indicated as mixed type inhibitor, with predominant cathodic effectiveness. In addition, the inhibition mechanism of secang was shown as physicsorption mechanism and obeys Langmuir Isotherm model.