Maier, H. J.H. J.MaierVollertsen, FrankAlmohallami, A.Arghavani, M.Böhmermann, F.Freiße, H.Herrmann, M.Mousavi, S.A.Schöler, S.Scholz, P.Tenner, J.Teller, M.Umlauf, G.Wulff, D.Yilkiran, D.2020-03-252020-03-252017https://media.suub.uni-bremen.de/handle/elib/3340In the present study, the surface conditions of workpieces used for dry-metal forming experiments were analyzed. Spe-cifically, the effectiveness of different cleaning approaches was evaluated using x-ray photoelectron spectroscopy, in-frared spectroscopy and wetting experiments. The best cleaning results were obtained using a CO2-based approach. CO2 acts as an effective solvent and as a result of the mechanical impact, it removes material from the surface. In fact, clean-ing results were similar to those achieved by plasma cleaning. However, even simple cleaning with a towel and acetone left only a surface film of less than 100 nm. A residual oil film thickness below 100 nm on the work piece appears suf-ficient to mimic true dry-forming conditions in most cases. In order to determine cleanliness of surfaces used in dry-metal forming, an infrared spectroscopy-based oil film gauge along with a customized extended calibration curve turned out to provide for sufficiently accurate data.5decleaningcoatinglubricantspectroscopysurface analysis620Artikel/Aufsatzurn:nbn:de:gbv:46-00105947-10