TY - JOUR A1 - Tleuova, A. A1 - Schenderlein, Matthias A1 - Mutaliyeva, B. A1 - Aidarova, S. A1 - Sharipova, A. A1 - Bekturganova, N. A1 - Miller, R. A1 - Grigoriev, D. T1 - Selection and study of alkoxysilanes as loading in submicrocapsules for self-lubricating coatings JF - Colloids and Surfaces A N2 - The possibility and conditions for the formation of nano- or submicrocapsules loaded with hydrophobic active ingredients (alkoxysilanes) into the matrix of coatings with self-lubricating effect are considered. The optimal composition of the alkoxysilane submicrocapsules, and their physicochemical properties were determined. The longer the radical chain length is, the lower is the rate of hydrolysis, and, accordingly, the more stable is the formed emulsion. The methods of laser correlation spectroscopy in measuring the size and zeta potentials of the submicrocapsules with different loads of the active agent allowed to determine the optimal ratios of the active ingredients. The optimal concentration of the active agent is between 4 and 9%. Based on contact angle studies, octadecyltrimethoxysilane was selected as optimum compound. The introduction of 4 wt% of octadecyltrimethoxysilane reduces the friction coefficient of coatings by 20–30% under vibrating motion and by 15–20% under continuous motion. The data obtained can also be useful for the encapsulation of other hydrophobic active agents and for various other purposes, for example, for the introduction of biocidal agents. KW - Microencapsulation KW - Spontaneous emulsification KW - Self-lubricating coating KW - Antifriction coefficient KW - Alkoxysilanes PY - 2019 DO - https://doi.org/10.1016/j.colsurfa.2018.12.018 SN - 0927-7757 SN - 1873-4359 IS - 563 SP - 359 EP - 369 PB - Elsevier AN - OPUS4-47233 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hampel, Marco A1 - Schenderlein, Matthias A1 - Schary, Christian A1 - Dimper, Matthias A1 - Özcan Sandikcioglu, Özlem T1 - Efficient detection of localized corrosion processes on stainless steel by means of scanning electrochemical microscopy (SECM) using a multi-electrode approach JF - Electrochemistry Communications N2 - High resolution analysis of corrosion processes on stainless steels is a challenging task. The application of local electrochemical techniques such as scanning electrochemical microscopy (SECM) has opened new possibilities for the detection of corrosion products and activity on metallic surfaces. However, due to its stochastic nature, the analysis of pitting corrosion requires being at the right place at the right time. Scanning over large areas at a high resolution not only leads to long scan durations but also leaves many short-lived processes undetected. In this paper we present the combined automated operation of SECM and wire multi-electrodes connected to a multi-electrode analyzer (MMA). The inter-electrode currents between 25 wire electrodes connected via zero resistance ammeters (ZRA) are measured by the MMA at open circuit potential (OCP) and the electrodes reporting anodic currents are detected automatically to be analyzed by means of SECM. The results demonstrate the successful application of this methodology for the detection of unstable and stable pitting processes on 304 stainless steel in a corrosive aqueous environment. KW - Scanning electrochemical microscope (SECM) KW - Localised corrosion KW - Corrosion monitoring PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-478646 DO - https://doi.org/10.1016/j.elecom.2019.02.019 VL - 101 SP - 52 EP - 55 PB - Elsevier B.V. AN - OPUS4-47864 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -