Serpentine Tribotechnical Composition «Saranovsky». Preparation and comparative tests
Non-traditional tribotechnics with the use of organic, metal and mineral tributechnical compositions allows for without disassembly repair of worn-out friction units of various civil and military equipment. From 1942 it developed a slow but with 2000 there were over 200 different tribological compounds, of which in Europe, Asia, America wide-ly used a few dozen.
In Russia, due to the simplicity of preparation, application and efficiency, the most widely used powders of minerals of the serpentine group were found. Their creation and justification of application took place in the 80-90s years in St. Petersburg and many other research institutes of Russia.
Tribological studies of highly dispersed powders of the serpentine group minerals – magnesium hydrosilicates Mg6[Si4O10](OH)8 and similar, as well as performance testing of their application was carried out in the Nanocentre of research Institute GOSNITI. Here in the research serpentine compositions or geomodificators friction conducted more than 5,000 tests 80 different songs, and in the center UNIITiN conducted operational testing tribotechnical composition, created Nanocenter GOSNITI.
In creating the serpentine tribotechnical composition in the Nanocenter GOSNITI waste is used flotation chrome ore Deposit mining facility. Powders were purified, subje-cted to heat treatment, mechanoactivation on a planetary ball mill ACTIVATOR 2SL, be-fore and after preparation was investigated on X-Ray diffractometer XRD 6000, and on an inverted metallographic microscope OLUMPUS GX 51. Laboratory tribotechnical tests of the finger-disc steel pair in engine oil with tribo-compositions were carried out on the TRB-S-DE tribometer in the step loading mode to a pressure of 218 MPa at a sliding speed of 100 cm/s.
These comparative tests showed that the tribo-composition of Saranovsky in mineral motor oil of quality classes SS API and viscosity 30 SAE (manufacturer Russia) approximated its tribological properties to the best in the world motor oil firm Mobil to the coefficient of friction 0.04.
250-hour performance testing in the center UNIITiN in three diesel engines of Rus-sian tractors showed a decline in fuel consumption by 5-8 %, of oil burning on 10-12 %, the opacity of gases by 8-15 %, and iron content in oils by 20-25 %. This once again confirmed the known from the late 80-s years of the effectiveness of in-place repair of serpentine structures to increase their service life automotive engineering.
Summarizes the features of the building and tribological properties of serpentine coatings. From this it is assumed that the growth of the carbon-containing coating, even with the removal of the tribotechnical composition from the oil, is due to the activation of friction coatings and the unique properties of the atoms of the carbon, the possibilities of sp2, sp3 hybridization, chemisorption coatings of hydrocarbon lubricants, and in the interfaces to dry and also carbon dioxide environment.