• SÄKAPHEN® SI 57® EL

  • 1

PHENOLIC EPOXY-BASED HYDROPHOBIC HEAT-CURED COATING FOR WEAKLY ACIDIC TO STRONGLY ALKALINE MEDIA. FOR THE COATING OF FINNED AIR COOLERS. DARK BROWN, HIGH GLOSS.

SÄKAPHEN® Si 57® EL is a high quality hydrophobic phenolic epoxy-based heat-cured thermosetting coating optimized for the coating of finned air coolers, especially with a small fin pitch.

The coating is chemically resistant to fumes and mist also in droplets of strongly alkaline to weakly acidic media, all types of cooling water, including brackish, river and sea water as well as deionized water, salt solutions, greases, oils and gases.

The surface is hard-elastic with hydrophobic properties and prevents caking, fouling and incrustation.

The images are for illustration purposes only and may differ from the actual appearance of the products.

  Fields of application:
 

Optimized for the application on finned air coolers. Due to a particular low viscosity finned air coolers with a fin pitch from 1 mm upwards can be protected.

   
   Salt spray test: Pdf download here
   
   
   
   
   
   

 

SÄKAPHEN® Coating Si 57 EL - Product Data

Properties - Heat Cured Duroplast Coating
Resin base - Phenolic epoxy resin blend
Cure Mechanism - Heat cured
Quantity of components - 1
Color - Dark Brown
Surface - Glossy
pH Range pH 3 - 14
Wet Film Thickness per layer µm 50
Total dry film thickness µm 30-80
Coverage approx. kg/m²/DFT 0,4 kg / m² / 80µm
Surface Preparation Sa SA2 ½ - SA 3
Surface Profile µm 40 - 60 µm
Temperature resistance dry (dry air oven) °C -20°C to +180°C/200°C
Temperature resistance wet (water) °C -20°C to +180°C/200°C
Resistance to water vapor diffusion °C ≤ ∆T 30°C
Overcoating Waiting Time hours/23°C no limitations
Chemical Curing days after final bake
Linear Thermal Expansion µm n/a
Pore testing Volts 67,5
Pendulum hardness acc. to König 6° sec 200
Shore D Hardness Shore D 94
Adhesion Test N/mm² [MPa] >30
Salt spray test hours 1400
Impact Strength mm (1 kg) > 1000
Surface smoothness (Ra) µm Ø 3 readings 1,12
Surface tension mN/m <28
Abrasion resistance mg/1000 r. not relevant
Crosscut class 0
Heat conductivity Ø 12,7x2,0mm on C-Steel with 67,37 w/mK W/mK 2,51
Comments   *Surface profile on the frame, fins remain untreated.