Specialists in Lacquering Aluminium Coils

waterfin®

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bobina-waterfinwaterfin® is the designation of ALUCOAT for the lacquered foil intended to be used for the production of fins for heat exchangers with hydrophilic properties. The lacquered aluminium coils waterfin® makes the condensated water drop to become a layer avoiding the feasibility of ice bridges. It allows to produce smaller equipments.

Its mains advantages are:

  • Very good finishing, high thermal conductivity, good drawability and low density.
  • Collars height up to 12 mm could be obtained (depending of the thickness and characteristics of metal).
  • Studies performed by specialized independent organisms demonstrate that waterfin® does not favor the growth of micro-organisms.
  • waterfin® with high hydrophilic properties it is the best choosing for standard environments.
  • It is also possible to incorporate our pre-treatment systems Alucoat® prelac that improve the protection against corrosion and the lacquer adherence over the aluminium surface.

Range of products

There are two kinds of lacquered aluminium coils of waterfin®:

  • waterfin® 100: It covers with a blue lacquer with a high level of hydrophilic properties. This is the best choice for standard environments.
  • waterfin® 700: It covers with a double layer of blue hydrophilic lacquer. For that reason makes this product ideal for contaminated industrial environments.

Composition

bobina-waterfin-mini

Applications

ALUCOAT supplies its product waterfin® in reels of wide until 1.600 mm, with core of steel or carton of up to 500 mm and maximum weight of 6 tonnes. It can be used for the development of the following applications:

  • Heat exchangers for food industry.
  • Heating and air conditioning systems for buildings.
  • Heat exchangers for cars, ships and airplanes.

Technical Data

Product description:

Aluminium foil from 100 to 300 μm with silica based or silica free lacquer for both sides.

Coating properties:

PROPERTY METHOD waterfin® 100 waterfin® 700
Nature Hydrophilic Hydrophilic Silica free
Colors Blue Blue
Wettability UNE EN 546-4 A-B A-B
Adherence ASTM D-3359 O.K. O.K.
Bending ECCA 7 (0 ≤ T BEND ≤ 1) O.K. O.K.
Drawing ECCA T6-ISO 1520  (5mm) O.K. O.K.
Curing Resistance to MEK > 10 d.f. > 30 d.f.
Heat Resistance 200ºC/5 min. 190ºC/30 min. O.K. O.K.
Solvent Resistance TRICHLOROETHYLENE (85ºC/5 min.) Weight loss < 1% Weight loss < 1%
PERCHLOROETHYLENE (120ºC/30 min.) Weight loss < 1% Weight loss < 1%
Corrosion Resistance (Neutral Salt Spray) ASTM B117 (NaCl 5%/35ºC) Up to 300 h 1000 h
Contact angle (distilled water) Initial < 10º < 10º

Recommended alloys:

EN AW 8011A, EN AW 8006, EN AW 1100 (according to European Standards (EN 573-3))

Customer can specify its needs in order to choose the best thickness, alloy and temper of the metal

Product Data Sheet: pdf