Surface protection of steel in oil well acidizing fluids using L-theanine-based corrosion inhibitor formulations: Experimental and theoretical evaluation
By Ituen, Ekemini; Mkpenie, Victor; Dan, Emmanuel
Published in Surfaces and Interfaces
2019
Abstract
Corrosion of X80 steel in 1 M and 15% HCl solutions and its inhibition using L-theanine (LTN), a natural white powder of green tea leaves extracts, was investigated using electrochemical frequency modulation (EFM), potentiodynamic polarization (PDP), linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and weight loss (WL) techniques. Increase in concentration of LTN improves its adsorption on X80 steel surface, forms thin protective film that increases charge transfer resistance and inhibition efficiency, but reduces corrosion current density and double layer capacitance. LTN acts as mixed type inhibitor with anodic predominance. Adsorption of LTN is spontaneous, exothermic and best approximated by Temkin adsorption isotherm. Composites of LTN and some synergistic compounds afford higher efficiencies (up to 89.2%).at 90
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.