CREPEX®
revolutionary anti-corrosion coating

• The passivation and stabilization coating CREPEX® provides protection for 15 years or more. It is a water-based protective coating that prevents the formation of corrosion based on a chemical reaction that takes place under the coating film to form an anti-corrosive pigment firmly embedded in the base (iron, steel, zinc, copper, etc.). This combination produces a compact material that provides protection against rust formation, stabilises the corrosion process already underway and prevents its further spread over the mechanically damaged surface.

• Just as CREPEX® can be applied to new, clean surfaces (iron, steel, aluminum, copper, zinc, bronze, etc.), it can be applied to surfaces that are already corroded, including patinated Atmofix and Cor-Ten steels.

• CREPEX® can be applied in all the same ways as paint application, e.g. by brush or roller, by dipping or by compressor, high or low pressure spraying („airless“).
• CREPEX® provides all substrates to which it is applied with exceptional conditions that enhance the adhesion of all commonly available topcoats, including applied and subsequently burned powder coatings.

• Depending on the application method, one litre of coating covers an area of 8-12 m².
• The required coating thickness to ensure proper chemical reaction and subsequent protection is 10-40 µm. Depending on the method of application, the thickness of the coating may vary.

• At recommended temperatures above +5 °C, the recommended drying time is 24 hours. Higher temperatures (up to a maximum of +30 °C) or drying equipment can significantly reduce this time to 20-40 minutes.

• The CREPEX® coating system has been properly tested by SYNPO, a. s. research institute for C3 and C4 corrosion aggressiveness levels. In tests, it met selected regulatory requirements after 480 hours of exposure in neutral salt spray, which corresponds to a coating life of 15 years or more.

• Depending on how CREPEX® is applied, a film 10-40 µm thick is formed on the surface, which is molecularly merged with the surface as it dries and then sealed with a topcoat according to the individual requirements and needs of the client.
• The final coatings can therefore be much thinner and weigh less, which brings a number of advantages: the overall consumption of coating materials is reduced, and the structures to which the coating is applied are less stressed and therefore more structurally stable.
• In order to achieve a thicker coating film (with respect to current standards), CREPEX® can be applied repeatedly up to the desired thickness and then sealed with a topcoat according to your individual requirements. The period of protection against the formation and spread of corrosion is thus “multiplied”.

• • The excess of active agents contained in the coating will prevent the formation and spread of corrosion beneath the surface of the covering paint or other protection from the point of damage. Simply re-treat the damaged area itself with CREPEX® coating and the required finishes.
  • A partially mechanically damaged surface can repair itself to a certain extent thanks to the large number of active agents contained in CREPEX®.

• When the treated surface is bent or partially stretched, no cracking or other disturbance of the coating film occurs.
• The existing damage can simply be re-treated by applying CREPEX® in combination with a topcoat in the corresponding area.

• CREPEX® can be applied to metallic substrates (chassis, various structures, enclosures) as well as to non-metallic substrates (zinc, brass, copper) with the commonly required heat resistance.
• The heat resistance of CREPEX® has also been tested at higher temperatures (280 °C).

• In accordance with EU regulations, CREPEX® does not belong to the category of potentially hazardous substances, thus there is no obligation to issue a safety data sheet for the coating.
• According to the European Road Transport Agreement (ADR), ^CREPEX® does not have to be transported as dangerous goods.
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• The subject of the treatment was an already corroded column of the high-voltage transmission system weighing 20 tons and with a surface area of 550 m²:

 Price calculation notes:

1) Hot dip galvanizing

• To the cost of the hot-dip galvanizing treatment must be added the losses from interruption of power supply, etc.
• The direct costs for the hot-dip galvanizing treatment of profiles are calculated at a rate per 1 kg of weight (example A) of the profile to be galvanized or also per 1 m² of galvanizing (example B):
• Example A: The achievable price ranges from CZK 20 to CZK 30 per kg, which for a given column weighing 20 tonnes at an average price is approximately CZK 500,000, and the estimated cost of dismantling, transport and preparation, removal to site and assembly is approximately CZK 500,000, resulting in a total cost of CZK 1,000,000.
• Example B: With a rate of CZK 750 per 1 m² for a given column with a surface area of 550 m² , the achievable price is CZK 412,500 and the estimated costs for dismantling, transport and preparation, removal to the site and assembly amount to approximately CZK 500,000, which together make a cost of CZK 912,500.

2) CREPEX® coating

• When treating columns with CREPEX® coating, all the costs and complications listed in the table above are eliminated and only the cost of the coating application will be added to the purchase price of the coating.
• The cost of treating profiles with CREPEX® coating can be around 500 CZK per 1 litre for larger orders. To make the calculation easier, let’s calculate the average consumption of coating per m², i.e. 10 m²  per 1 litre.
• The resulting direct cost of procuring the necessary CREPEX® coating for the column in question is 27,500 CZK and the estimated cost of spraying or painting can range from 20-50,000 CZK, which in effect is much less than 100,000 CZK.
• The cost of painting or spraying CREPEX® coating is therefore hundreds of thousands of CZK lower than the cost of hot-dip galvanizing.
• The difference in costs for the treatment of one pole of the high-voltage transmission system can therefore amount to CZK 900,000, without quantifying the losses during the interruption of energy supply for the entire period of repair by hot-dip galvanizing.

CREPEX® coating protection is faster, less complicated, cheaper, more effective and, last but not least, more environmentally friendly.