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Construction

All year round, no matter what the climate, MacDermid construction coatings are protecting architectural aluminum, fasteners and nails as well as provide excellent adhesion for organic coatings.

 

Technology overview

 

Aluminum anodized and conversion coatings Construction Coatings

We offer hexavalent chromium-free passivation systems to conform to environmental directives such as RoHS and ELV. These directives require hexavalent chromium replacement coatings. Our Qualicoat approved coatings can be applied as the final finish or as a primer to improve paint adhesion on components such as window frames.

Additionally our Oxidite anodising range consists of products to clean, etch, polish and deoxidise the aluminium prior to anodising. Additives to the anodising bath to give better uniformity, greater temperature tolerance and control spray. Complementary to our coloring dyes are seals which include mid-temperature, low-temperature and nickel-free systems

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Surface preparation

Removing oil, grease and general soils from metals such as aluminum, brass, magnesium and steel is a critical step in any surface treatment process. The MacDermid range of Clepo, Isoprep and Metex cleaners are proven to provide a chemically clean surface in the demanding conversion coating, electroplating and pre-paint applications. Construction Coatings

The range includes:

  • Non-etch cleaners for light metals
  • Etches for aluminum
  • Soak degreasers for ferrous and non-ferrous metals
  • Electrolytic cleaners for ferrous and non-ferrous metals

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phosphating

Rustproofing

Phosphate coatings are extensively used to improve the adhesion of organic coatings to ferrous metals. The CanPhos and Keykote phosphating improves this adhesion in either spray or immersion applications.

To meet RoHS, WEEE and EOLV directives, our processes include Qualicoat and GSB approved chromium-free systems. For multi-metal use we have cleaner phosphate systems which can be teamed with high-performance dry in place final seals to provide reliable, cost-effective pre-treatment for painting.

Our latest technology BlueKote 2000 answers industry concerns on disposal of phosphates. BlueKote 2000 is both phosphate and heavy metal-free.  BlueKote 2000 increases the bonding between metal and paint as well as improving the corrosion resistance.

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Hot Dip galvanizing

RustproofingMacDermid Hot Dip Galvanizing products cover the requirement for effective
cleaning and acid pickling and the protection of the freshly galvanized surface against white corrosion.

Alkaline and acid cleaners effectively prepare the surface prior to the use of inhibited acid pickles which provide a constant pickling rate and a long bath lifetime.

For many years the water based, chromium-free post treatment system Hydroclear has proved its capability to prevent white corrosion.

Hydroclear conserves the uniform brightness of the original galvanized surface and improves the visual quality.

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Mechanical zincRustproofing

High tensile fasteners and nails need a sacrificial coating which provide long term protection against rust as well as not embrittling the substrate. Mechanically applied zinc, MacuGuard, meets these requirements. It is the global leading process for non-embrittling zinc deposits.

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Zinc electroplatingRustproofing

Electroplated zinc gives exceptional sacrificial corrosion resistance. This means the zinc corrodes preferentially to the steel, therefore extending component life. Our zinc plating systems provide bright 'blue chromium type', iridescent and black finishes. All of which add aesthetic value to the component. Additionally our range of dry film lubricants reduce the friction coefficient, making assembly easier and more consistent.

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Surface Finishing for Construction Industry from Alan Gardner