RUST-ANODE PRIMER®

GENERAL INFORMATION

RUST-ANODE PRIMER® is a cathodic protection applied as a one-component cold zinc coating.
RUST-ANODE PRIMER® is an organic zinc rich coating ready for use.
RUST-ANODE PRIMER® contains exclusively biodegradable solvents.
RUST-ANODE PRIMER® can be applied by brush, roll or any spraying technique.
Lifetime expectation is equal to the lifetime expectation of the hot dip galvanisation.
RUST-ANODE PRIMER® can be used as primer or as duplex system with a compatible topcoat.
RUST-ANODE PRIMER® can reload, by electro-chemical bonding process, the existing cathodic protection of old hot-dip, steel old RUST-ANODE PRIMER® and can encapsulate existing paint coatings.
Good adhesion on existing paints well adhered.
High resistance to corrosion, abrasion and impact.
Hydrocarbons and urea resistance.

CHARACTERISTICS

  • Zinc quantity: About 88% (+/- 2) (weight) of pure zinc in the dry layer (DFT)
  • Zinc purity: About 99.995% purity
  • Ready for use: One component zinc rich coating
  • Colour: Light grey, matt finish RAL #7005
  • Security: Non toxic and non flammable when dry
  • Specific gravity: 2,40 Kg/dm3 ± 0,1
  • VOC (Solvent): 285 gram/litre ± 10

PROPERTIES

  • Can be used as primer or as finishing coat on top of previous RUST-ANODE PRIMER® layer
  • Can reload the cathodic protection of the old hot-dip galvanisation or reload previous RUST-ANODE® layers
  • High resistance to corrosion, abrasion and impact
  • Duplex system: RUST-ANODE PRIMER® can be over coated with compatible paints
  • Application range: As primer 40 to 80 µm DFT or as 2-layer system up to 160 µm DFT
  • Resistance to cold / heat: From –80°C to + 200/250°C (-112°F to + 392/482°F)
  • Application temperature: From –10°C to +40°C (different curing times)(14°F to +104°F)
  • Theoretical coverage: 7,05m²/kg at 40µm DFT
  • Practical coverage: 6,20m²/kg (sprayed) at 40µm DFT (30,3ft²/lbs at 1,5mill DFT)
  • Resistance to marine environment: Exceptional good, duplex system is recommended
  • Resistance to acids / alkaline compound: Can be applied in an Ph atmosphere range from 5,5 up to 12,5
  • High plasticity: Without cracks – Allow the dilatation of the metal support
  • Weld ability: Primer up to 40 µm can be welded without affecting the weld (X-ray)
  • Lifetime expectation: Similar to hot dip galvanisation (depending on thickness of dry layer)
  • Lifetime expectation duplex: Similar to hot dip galvanisation with duplex system
  • Conductivity : Dry film has a good conductivity
  • Saline mist: ASTM B117
  • Bending: ASTM D-522
  • Flexibility: ONGC-1-GP-71 Method 119.5
  • ONGC -1.181: Coating rich in organic zinc

APPLICATION

a) Surface preparation:

  • Cleanliness standard
  • Roughness degree Ra 12,5 µm (0,5 mill)
  • Free of all oil and grease or other chemical contamination
  • Free of all dust
  • Maximum surface humidity 90%
  • Substrate temperature must be minimum 3°C (5°F) above dew point
  • Normal application temperature between –5°C and +40°C (23°F and 104°F)
  1. Idéal: Grit blasting, intense steel brushing or UHP water blasting and a water washing (cleanliness standard and roughness degree Ra 12,5 µm) + 2 layers of RUST-ANODE PRIMER® each 40 to 60 µm.

  2. On black sheets: On clean, dry and non-greasy support, the result will be good. However, calamine (carbon deposit) could come loose with the time and lift up the coat. Therefore, it must be removed by grit blasting or by UHP water blasting.

  3. On cold formed steel: It is necessary to remove all grease from the surface and to grit blast or UHP water blasting. You can also grind the surface with an abrasive disk.

  4. On lightly rusted part: Brush the rust completely to eliminate all the loose particles and apply water or steam cleaning to remove rust dust.

  5. On old paints: It is not necessary to apply Rust-Anode Primer on the total surface but just retouch the rusted places (Never on tarred products or paintings containing aluminium) RUST-ANODE PRIMER® is a cathodic protection and therefore will be effective as such in direct contact with the steel surface. On old paint, the Rust-Anode Primer will act as a paint or passive coating and gives no cathodic protection.

  6. On new and old hot dip galvanisation or metallisation: RUST-ANODE PRIMER® can be applied directly without mechanical surface preparation. Old hot-dip galvanisation or old metallisation should be washed with water to remove all surface contamination (zinc salts). It will reload the existing old zinc layer restoring the continuity of the cathodic protection. New hot-dip galvanisation or metallisation broken by drilling, cutting, or welding will be fully cathodic protected. For welding, brush correctly and before applying RUST-ANODE PRIMER® (recommended in 2 coatings of 40-60µm), all surfaces should be free of all oil, grease or other contamination.

b) Application procedure:

Important remarks:

  • The product is ready for use by brush or roller.
  • Never shake the can when closed in order to avoid formation of hydrogen.
  • The density of RUST-ANODE PRIMER® is such that you need to mix it before use with a mixing system until a homogenous mixture is obtained.
  1. Open the can carefully.
    A bulbous lid may indicate presence of hydrogen (a reconstitution product); in this case, the can should be opened carefully to allow the hydrogen to escape.
    Formation of hydrogen does not change the quality of the product, which can be used once it has been mixed according to the technical procedure.

  2. The product is ready for use by brush or roller.
    Apply best by tempering two layers (with interval of 1 to 24 hours depending on air humidity and outside temperature) in order to obtain a layer of min. 80m (dry layer= DFT).

    Brush/Roller:
    Ready for use.
    Covers 6,20 m² /kg by layer of 40 µm (when dried=DFT). 
    If necessary during application, RUST-ANODE PRIMER® can be diluted with a little of Rustasolv Priml in order to recover its initial viscosity.

    Spraying
    :
    Air supported spraying: Thin out with 10% max. (Weight) of Rustasolv Priml (to be tested before).
    Airless spraying: Thin out with 5% max (weight) of Rustasolv Prim.
    Theoretical coverage : 7,05m²/kg at 40 µm DFT 
    Practical coverage : 6,20 m²/kg by layer of 40 µm DFT (low pressure)

  3. Drying and curing time (20°C – 70°F):
    • Dust free after 20 minutes (depending on air humidity and outside temperature).
    • Dry to handle after 1 hour (depending on air humidity and outside temperature).
  4. Second Layer:
    • Ready for a 2nd coat of RUST-ANODE PRIMER® after 1 hour (depending on air humidity and outside temperature).
    • Ready for compatible sealer and/or topcoat after 6 hours (recommended) to max. 72 hours (depending on ventilation conditions, temperature humidity and to be tested).
  5. Recommandations:
    • We recommend using the mist coat technique when spraying before applying the total necessary thickness.
    • The surface of the residual RUST-ANODE PRIMER® left in the can after a working day should always be covered with a thin layer of Rustasolv Prim. Once opened, the life time of the product is limited in time.
    • Cleaning of brushes and instruments with Rustasolv Prim.

LIFETIME EXPECTATION

Lifetime expectation is equal to the lifetime expectation of hot dip galvanisation (See graphic).

PACKAGING

Cans of 6 kg (13,2 lbs) and 12 kg (26.4 lbs).
1.5kg (3.3 lbs): Only on request.

STORAGE

Best to keep the containers in a dry store between 5°C and 20°C (40°F to 70°F) in the original unopened containers.
Shelf and cans lifetime (unopened containers): 24 months in standard conditions.

NOTE

The information in this data-sheet is given in good faith and to the best of our knowledge but is subject to revision without prior notice. Since condition of application and service may be beyond our control, no liability can be accepted on basis of this data.