PreCoat for grit blasting and mechanical pretreatment

AD Chemicals metal surface treatment logo
  • Improved adhesion and corrosion protection after grit blasting
  • Combining the worlds of chemical pretreatment and mechanical pretreatment
  • Meets or exceeds quality standards such as Qualicoat, Qualisteelcoat and GSB

PreCoat F31/20 is suitable for the treatment of substrate steel, aluminum and galvanized steel. PreCoat is a chemical treatment applied directly after grit/sand blasting or metallization (also referred to as metal spraying).

precoat for mechanical pretreatment blasting

Contact



Contact us for more information

+31 (0) 167 526 900

This PreCoat F31/20 productline is the result of an R&D trajectory of more than 8 years. PreCoat F31/20 significantly improves the quality of grit, sandblasted or metallized products. It has two main benefits; by applying the product directly after grit/sand blasting, a conversion layer is created that substantially improves the adhesion of the painting system (suitable for wet painting and powder coating) and significantly enhances the corrosion-protection resistance properties of the paint system as a whole. The application procedure of PreCoat is very easy and can be easily integrated in every business process.

The innovative aspect of these products is that it combines the worlds of grit/sand blasting and chemical pre-treatment. A metal surface treatment of grit blasting ensures an uniformly cleaned surface and good paint adhesion but lacks corrosion resistance on the substrate.

Advantages Steel

By applying PreCoat F31/20 directly after blasting the following benefits are acquired for the end product:

  • Creation of a conversion layer
  • Protection against “flash”rust
  • Paint adhesion layer for organic coatings (powder coating and wet painting),
  • Protection against and reduced undercreep corrosion

Advantages Aluminium

By applying PreCoat  directly after blasting the following benefits are acquired for the end product::

  • Creation of a conversion layer
  • Paint adhesion layer for organic coatings (powder coating and wet painting)
  • Protection against corrosion and reduced underceep corrosion

Advantages Galavanized Steel

By applying PreCoat directly after blasting the following benefits are acquired for the end product:

  • Creation of a conversion layer
  • Paint adhesion layer for organic coatings (powder coating and wet painting),
  • Protection against corrosion and reduced underceep corrosion
  • Passivation properties, materials are passivated and have bare corrosion resistance up to several days

Easy application method

The PreCoat F31/20 procedure can be integrated easily in every grit/sand blasting companies its business processes. It is applied directly after grit/sand blasting or metal spraying. The application procedure.

precoat f31 20 easy proces chemical

Test results

To objectively determine the corrosion resistance and paint adhesion properties extensive testing according to international standards is required. In metal surface treatment there are two types of tests common practice. The tests executed to verify the effects of PreCoat are :

Paint Adhesion

  • Cross hatch, conform EN ISO 2409 / ASTM D3359
  • Boiling test / wet adhesion
  • Impact test, in accordance with EN ISO 6272-1 / ASTM D2794 / EN 13523-5
  • Dolly pul off adhesion test, in accordance with ASTM D 4541

Corrosion protection

  •  Machu corrosion test
    • The Machu test, also known as accelerated corrosion test on test panels and construction parts according to Qualicoat specifications. The test is made in a warm environment. To create this environment the test panels are placed in the plastic container, which is placed in the Machu Test Bath. The test panels need to be scratched crosswise with a 1mm cutting tool before placing them in the warm moisture test chamber. The fluid content, temperature and remain time are specified
  • Salt spray testing
    •  Salt spray testing is an accelerated corrosion test that produces a corrosive attack to coated samples in order to evaluate (mostly comparatively) the suitability of the coating for use as a protective finish. The appearance of corrosion products (rust) is evaluated after a pre-determined period of time. Test duration depends on the corrosion resistance of the coating; generally, the more corrosion resistant the coating is, the longer the period of testing before the appearance of corrosion/ rust. The salt spray test is one of the most widespread and long established corrosion tests. The salt spray tests are executed in accordance with ISO9227/ Din50021/ ASTM B117.

Demonstration video

This demonstration video shows the easy application method of PreCoat and obtained test results.

Aluminium

AD Chemicals supplies a range of products for the pre-treatment prior to powder coating, anodizing and passivation of aluminum substrates

Galvanized alloys

AD Chemicals supplies a range of products for the pre-treatment of hot dip galvanized steel and for hot zinc processes.

Iron and Steel

AD Chemicals has built a reputation for innovation and product improvement and has developed a range of alternative products for the phosphating process based on polymers and silane based binders

Multimetal

AD Chemicals produce and supply a range of products that surround the electro-chemical polishing process of many substrates such as titanium, stainless steel and aluminum.