Description
Two component protective zinc-rich epoxy primer EPPEX Zn RICH.Scope and specifics of application
EPPEX Zn RICH primer is a cold-dip galvanizing material with a high volume dry residue, high zinc content and good protective properties. It is recommended for use as a primer in complex anti-corrosion protection systems with polyurethane two-component enamel "Polytex". It can be used without finishing coating when painting objects exposed to atmospheric conditions (atmospheric corrosion category C3).
The coating of the primer does not prevent welding operations by spot welding or arc welding in an inert gas in a layer of 15-20 microns. The coating is resistant to sea and fresh waters, salts water solutions, oil and petroleum products.
It is used for coating pipes and pipelines, oil and gas pipelines, railway bridges, road bridges, tunnels, ground parts of piles, overpass supports, road fences, navigation and vehicle control facilities as well as for coating steel structures and equipment in the wood and chemical industries.
Information on the material resistance to various media is available on request.
Main applications: oil and gas industry, transport construction, chemical industry.Instruction for use
2. Metal surface should be abrasive blasted to grade 2 due to GOST 9.402
(Sa 2½ or Sa 2 по ISO 8501-1) with roughness, recommended blast profile is Rz from 30 to 50 mcm. For hot-rolled steel, mechanized and manual surface cleaning up to degree 3 is allowed due to GOST 9.402 (St 3 or St 2 to ISO 8501-1).
Application on a smooth surface without roughening is not allowed.
3.Metal surface must be dust free.
Conditions
Ambient temperature from +10°С to +35°C, when applying at the temperature ≤00С surface icing is highly possible. Primer temperature when applying should be no less than +15°C.
Relative air humidity no more 80%.
The process of applying
|
Preparation |
The product is two component. Component А is a dispersion of pigments and anticorrosion filler in epoxy resin. Component B is a hardener solution. Mix the contents of the containers in the supplied proportions. After mixing, use within the specified pot life. Mixing sequence: The basis (component A) is mixed with a construction mixer. Then mixed hardener (component B) is added to the basis (component A) and thoroughly mixed with a construction mixer. Attention! Careless mixing or incorrect ratio can lead to uneven curing and painting film properties weakening. Minimum open time before coating materials are applied (at a temperature of (20+2)°C and relative humidity (65±5)%) is 3 hours. The maximum time of cross linking time is 6 months. With a longer cross linking time, the coating must be sanded before applying the next layer Open time and cross linking time depend on the film thickness, temperature, relative humidity and ventilation. |
| Proportions |
100:3,5 by weight
8:1 by volume |
|
Pot life |
20°С - 4 hours |
|
Air-free application |
Thinning: 0-10% by volume The diameter of the nozzle: 0,015"-0,021" Initial pressure: 120-200 ATM. |
| Air spraying |
Thinning: 5-10%
Nozzle diameter: 2,2-2,5 mm Pressure: 3,5-4 atm |
|
Cross linking |
No less than (dry layer thickness 80 microns) at 200С. |
|
Roller Brush |
Can be recommended for small and hard-to-reach areas. Thin the primer depending on the working conditions when using brush. |
|
Thinner |
Formula thinner EPPEX |
|
Cleaner |
Acetone, Р4, Р5 |
|
Finishing |
Tubing, pistol and other spraying tools must be cleaned after using. |
|
Cleaning |
Wash the tools after using immediately. The frequency of washing depends on the amount of sprayed material, the temperature and the time since the shutdown, including any time lag. |