| AVS 66th International Symposium & Exhibition | |
| Surface Science Division | Thursday Sessions |
| Session SS+AS+HC+TL-ThM |
| Session: | Surface Science of Energy Conversion and Storage |
| Presenter: | Bo-Hong Liu, Lawrence Berkeley National Laboratory |
| Authors: | B.H. Liu, Lawrence Berkeley National Laboratory O. Karslıoğlu, Lawrence Berkeley Nationa lLaboratory M.B. Salmeron, Lawrence Berkeley National Laboratory S. Nemšák, Lawrence Berkeley National Laboratory H. Bluhm, Fritz Haber Institute of the Max Planck Society, Germany |
| Correspondent: | Click to Email |
Copper has been used in a wide variety of applications. Though relatively inert, it corrodes when in contact with aqueous solutions/water vapor and corroding agents such as chlorine.1 Benzotriazole (BTA) is a commonly used corrosion inhibitor to protect copper surfaces. A consensus regarding the mechanism of corrosion protection is that BTA complexes with surface copper atoms, resulting in a Cu(I)-BTA protective polymer layer.2 UHV-based surface science studies clarified the structure of the BTA layer on copper single crystal surfaces at low dosage, as demonstrated by a very recent study combining DFT and spectroscopic techniques;3 however, the effect of environmental factors could not be well addressed by this approach. Here, we report an Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS) study of the influence of water vapor and chlorine on well-defined Cu surfaces. To capture the material complexity of the corrosion phenomenon, we study copper single crystals as well as polycrystalline foils of metallic copper, cuprous oxide and cupric oxide. In this presentation, we will show that the water uptake of copper surfaces under humid condition is strongly influenced by the presence of a BTA layer. Also, a BTA layer blocks chlorine uptake in some conditions. Based on these experimental results, factors that influence the BTA inhibitory effect on copper corrosion are identified.
1. Atlas, D.; Coombs, J.; Zajicek, O. T., THE CORROSION OF COPPER BY CHLORINATED DRINKING WATERS. Water Research 1982,16 (5), 693-698.
2. Finsgar, M.; Milosev, I., Inhibition of copper corrosion by 1,2,3-benzotriazole: A review. Corrosion Science 2010,52 (9), 2737-2749.
3. Gattinoni, C.; Tsaousis, P.; Euaruksakul, C.; Price, R.; Duncan, D. A.; Pascal, T.; Prendergast, D.; Held, G.; Michaelides, A., Adsorption Behavior of Organic Molecules: A Study of Benzotriazole on Cu(111) with Spectroscopic and Theoretical Methods. Langmuir 2019,35 (4), 882-893.