Tsiatim-205 grease (GOST 8551-74) is a mixture of highly refined petroleum oils thickened with white ceresin. Basic performance characteristics: resistant to concentrated inorganic acids, amines, alcohols, hydrazines. It has high water resistance and protective properties. The grease operates efficiently at temperatures from -60 to + 50 ° С. Tsiatim-205 grease is designed to prevent agglomeration of threaded and contact joints and seals working in aggressive environments, and also for their sealing. At low temperatures, it gets thick; therefore, it is not possible to use it at temperatures below -20 ° С.
In threaded and other fixed connections, the grease provides tightness from -60 to 50°C. The grease demonstrates high stability in contact with concentrated inorganic acids and their vapors, as well as with a large number of other chemically active substances (alcohols, alkalis, amines, etc.). Tsiatim-205 grease is not recommended for work with oxygen. Grease shows high resistance to water. It well protects non-ferrous and ferrous metals against corrosion in an environment saturated (up to several milligrams per 1 liter) with vapors of strong oxidants, hydrazines, amines, etc. In terms of chemical resistance, it significantly surpasses perfluoroalkyl polyester, fluorocarbon, silica gel greases such as VNIINP-279 or VNIINP-282.The relatively low price and availability promote a wide circulation of of Tsiatim-205 grease. It is the most mass produced chemically resistant grease.
Physical and chemical indicators of industrial oil Tsiatim-205
Name of the indicator |
Norm GOST (TС) |
---|---|
Appearance |
Homogeneous ointment of dark brown or green-brown color |
Drop temperature, °C, not lower than |
160 |
Effective viscosity Pa-s |
48 |
at - 50°C and the average gradient of the strain rate 1000 s-1, not less than |
1 (10) |
at - 30°C and the average gradient of the strain rate 10 s-1, not less than |
1000 (10.103) |
tensile strength at 50°С, Pa (hs/cm2), not less than |
250 (2.5) |
Colloidal stability, %, not more than |
10 |
Corrosion test |
Withstands |
Oxidative stability mg KOH/g, not more than |
3,0 |
Content of free organic acids |
Absence |
Mass fraction of free alkali calculated as NaOH, %, not more than |
0,1 |
Content of mechanical impurities (1 ml of grease), %, not more than | |
with a diameter from 0,075 to 0,125 mm, not more than |
1000 |
with a diameter more than 0,125 mm |
Absence |
Mass fraction of sulfur, %, not less than |
0,2 |
Penetration at 25°C |
25 - 300 |