Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 72: Solid-Liquid Interfaces: Reactions and Electrochemistry
O 72.4: Poster
Mittwoch, 9. März 2016, 18:15–20:30, Poster A
Sustainable sarcosine inhibitors for corrosion reduction on DC01 steel — •Saad Kaskah1, Paulo Ferreira2, Gitta Ehrenhaft2, Jörg Gollnick2, and Christian B. Fischer1 — 1Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany — 2Institute of mechanics and material science, TH Mittelhessen University of Applied Sciences, 35390 Giessen, Germany
Sustainable corrosion inhibitors are considered for good efficiencies without any environmental limitations in steel protection. In this work four N-acyl sarcosine derivatives are investigated via direct surface adsorption on cold rolled steel DC01 as potential corrosion inhibitors. Potentiodynamic polarization measurements were conducted in an aqueous solution buffered with potassium phosphate. Furthermore, for a realistic test a spray corrosion chamber with fresh water was used in long term. The short-term electrochemical tests were performed for one hour and the spray corrosion chamber for 24 hours. For the chamber test, each metallic sample was digitalized with a scanner at specific times and the corrosion process evaluated by corroded area. The results showed an improved corrosion reduction for the tested inhibitors on DC01 steel. Their efficiencies show a direct correlation according to their molecular weight. The worst inhibitor is the natural mixture of coconut derived sarcosines with 20 % efficiency. The best one with the highest molecular weight and longest carbon chain is Oleylsarcosine with 96 % efficiency.