THE RESEARCH OF OPERATIONAL PROPERTIES OF STEEL PACKING TAPE COATEDWITH WAX EMULSIONS OF DIFFERENT MANUFACTURERS

Abstract

Steel packing tape is widely used for packing heavy and bulky goods. Today, metallurgical, woodworking
and other enterprises cannot do without it. To increase slip and corrosion resistance, wax emulsions are applied to the surface of metal packaging tape. Thanks to this, the friction coefficient of the tape is reduced, which improves its sliding, and it tolerates not only high air humidity, but also the chemical effects of aggressive substances. The purpose of this work is to study the performance properties of steel packaging tape with wax emulsions. Sliding was assessed based on the results of friction and wear tests of materials. The chemical composition of wax emulsions was analysed by infrared spectrometry on an FT 801 Fourier transform infrareds spectrometer and by synchronous thermal analysis on a STA 449 F3 Jupiter. The anti-corrosion properties of wax emulsions on steel strip samples were studied under conditions of elevated temperatures and humidity using method 207-3 (GOST R 51369‒99) and when exposed to neutral salt fog using
method 215-1.2.1 (GOST R 52763‒2007). As a result of wear tests, it was determined that domestic wax emulsions are inferior in wear resistance to their foreign counterparts, and also have higher friction coefficients. Chemical compositions of wax emulsions of different manufacturers were studied by IR spectrometry. A comparative analysis of the IR spectra
allows to conclude that the main component is wax. But unlike the foreign analogue, the IR spectra of domestic wax emulsions contain absorption bands characteristic of aromatic nitrogen-containing compounds, which indicates the presence of corrosion inhibitors in their compositions. Synchronous thermal analysis confirmed the chemical composition of wax emulsions and allowed to establish that the basis of domestic wax emulsions is synthetic polyethylene wax (melting point 62‒68 °C). Anti-corrosion tests of packaging tapes under conditions of elevated temperature and humidity confirmed the protective effect of domestic wax emulsions, which may be due to the presence of corrosion inhibitors in the compositions of wax emulsions. Under conditions of exposure to neutral salt fog, all samples had corrosive surface damage, i.e. in an aggressive environment, the studied wax emulsions are not effective enough as protection against corrosion
of packaging steel tapes.