화학공학소재연구정보센터
Materials Chemistry and Physics, Vol.221, 436-446, 2019
IR and Py-GC/MS investigation of composite PTFE/PEO coatings on aluminum
The data on the composition of polytetrafluoroethylene (PTFE) + Al2O3 coatings obtained on an aluminum alloy by the single-stage method of plasma electrolytic oxidation (PEO) are presented. The coatings are formed in an alkaline silicate electrolyte with introduction of dispersed PTFE particles stabilized with siloxane-acrylate emulsion. The comparative study of the surface of initial oxide and PIVE/Al2O3 coatings, dispersed PTFE powder, and dry emulsion residue has been performed by the method of IR spectroscopy. The method of pyrolytic chromatography - mass spectrometry was used to obtain the data on the composition of the emulsion dry residue, dispersed PTFE powder, and PTEF/Al2O3-coatings. The surface and the main bulk of compact polymerlike PTFE/Al2O3 coatings do not contain aluminum and silicon oxides. They consist of the products of destruction of emulsion and PTFE formed under effect of electric discharges during PEO and contain PTFE particles in pores and caverns.