PEVAK-EKT
ELECTROINSULATING HIGH-TEMPERATURE ANTICORROSIVE COVERING (LMD-EKT)
Objective: PEVAK-EKT it is intended for protection of metal surfaces, exposed at temperatures to 7000С in various environments, including alloys of zinc, an alliminium+zinc, an allumium+silicium, and also for use as high-temperature electroinsulating impregnation structure which in a combination to heat resistant isolation expands a scope of electrotechnical devices, allowing their operation at the temperature specified above.
Scope: metallurgy, mechanical engineering, electricity, the electrotechnical industry and other branches of a national economy (for metal surfaces of exhaust silencers, chimneys, heating devices, gas stoves, baths of a hot zinc covering, static elements of the immerse equipment etc., and also for windings of magnetohydrodynamic devices, electric cars and devices of a special purpose, heat resistant measuring sensors).
Properties: good adhesion to a metal surface and low wettability with alloys of zinc, an
alliminium+zinc, an allumium+silicium in a combination to high isolation properties at
temperatures to 7000С.
Technical characteristics.
| NN | Parametre | Characteristic |
| 1. | Appearance of structure | suspension of dark-green colour |
| 2. | Solid | 70% |
| 3. | Conditional viscosity on viscose meter B3-4 or VZ-246 (a nozzle 4мм) at 200С | 13-17 sec |
| 4. | Density at 200С | 1,3-1,6 kg/dm3 |
| 5. | Duration of drying of a covering to degree 3 at temperature 15-350С and relative humidity of 45-75 % | min 24 hours |
| 6. | Appearance of a covering | after drying the structure should form a monophonic smooth surface; separate small imperfections are allowed. |
| 7. | Specific volume electric resistance | min 1010 Omm (in an initial condition) min 106 Оmm (at 6000С) |
| 8. | Electric durability | min 10,0 MV/m (in ref. state.) min 5,0 MV/m (at 6000С) |
| 9. | Surface heat treatment after (item 5) drying | depending on service conditions, but at temperature min 2500С and max 4500С with rate of heating 700С/hour. |
PEVAK-EKT allows transportation in any kind of transport in container with being densely closed cover according to state standard specification 9980.5-86.
Application PEVAK-EKT in industrial conditions showed significant increase in a resource of work of a bath of a hot zync covering and in a combination to heat resistant electric isolation provided operability of immerse magnetohydrodynamic (MGP) of the pump in alloys of allumium+silicium at temperature to 7000С without special cooling.
