Unrivaled service
Our development of chromate conversion coatings for plated coatings helped seed developments in the field of aluminum treatments. Extensively used in industries such as aerospace, architecture and automotive, our technology helps to both protect and provide improved adhesion of organic coatings.
In addition, our technology is backed up by industry leading service. Combined this means that you can specify and apply the latest conversion coating technology with access to our industry expertise.
Chromium-free
Increasing concerns over the health and ecological effects of hexavalent-chromium has inspired the development of alternative solutions. For example, architectural our chromium-free Iridite EXD, NR2-I, NR4-T processes use are meet both GSB and QUALICOAT approval systems.
Advantages
Until now, most non-chromium conversion coatings have been based on a combination of organic polymers and fluoride compounds. While these types of products have excellent paint adhesion characteristics, in most cases, they have no corrosion resistance properties.
Based on that deficiency, MacDermid Enthone developed the Iridite range of chromium-free coatings that has shown to be both safe and effective as a true replacement for the hexavalent chromium systems.
They provide high adhesion values for paints and powder coatings as well as (where applicable) excellent corrosion resistance in its own right.
Products
- Iridite NCP - Chromium-free for paint adhesion and corrosion protection
- Iridite EXD - Chromium-free for paint adhesion
- Iridite NR4-T - No rinse application, chromium-free for paint adhesion and corrosion protection
- Iridite NR2-I - No rinse application, chromium-free for paint adhesion
- Iridite TCP-III -Trivalent Chromium passivation for paint adhesion and corrosion protection
Iridite NCP
Increasing concerns over the health and ecological effects of hexavalent-chromium have inspired the development of alternative approaches and technologies for various coating types.
At the center of the innovation, efforts are companies like MacDermid Enthone, whose development of chromate conversion coatings for plated coatings helped seed developments in the field of aluminum treatments.
Specifications and Approvals
- Qualified under MIL-DTL-81706 Class 3
- Bookman
- Diehl Aerospace
- Ericsson
- General Dynamics 10544
- Knorr-Bremse N12005-P25
- Motorola
- Synergie (Wheels)
Advantages
Until now, most non-chrome conversion coatings have been based on a combination of organic polymers and fluoride compounds. While these types of products have excellent paint adhesion characteristics, in most cases, they have no corrosion resistance properties.
Based on that deficiency, MacDermid Enthone has developed a product range that has shown to be both safe and effective as a true replacement for the hexavalent-chrome systems…Iridite NCP.
Iridite NCP provides both high adhesion values for paints and powder coatings as well as excellent corrosion resistance in its own right. This means that even unpainted areas of aluminum are protected against corrosion.
Meets environmental directives
Iridite NCP is the safe, reliable and cost-effective alternative to chromate based pre-treatments for aluminum and has been developed in response to the ELV, RoHS and WEEE directives.
Iridite NCP does not contain Lead, Cadmium, Chromium(hexavalent or trivalent), Mercury or PBB / PBDE compounds.
Applications
The coating exhibits bare, unpainted, corrosion resistance that is equal to hexavalent chromates on many aluminium alloys. The coating can be used as a final finish and can also serve as a base for paints, high-performance topcoats, powder paints, lacquers, or as a base for rubber bonding.
Alternatives
When the application is for a paint base only, then Iridite EXD may be considered.
Iridite EXD
QUALICOAT APPROVED
Iridite EXD is an environmentally friendly process developed for the chemical pre-treatment of aluminum and its alloys prior to coating. Its formulation is in complete compliance with the latest European environmental guidelines (ELV, RoHS, WEEE) and does not contain lead, cadmium, chromium, mercury nor organic or inorganic polymer compounds.
Iridite EXD is a non-chrome conversion coating process that produces an inorganic, almost transparent conversion coating on the degreased and deoxidised aluminum substrate. This coating will provide the perfect base for adhesion of subsequent paint or powder systems and will impart a high corrosion resistance to these systems. Iridite EXD is suitable for powder coating, wet paint, lacquer and as a base for rubber bonding.
Iridite EXD is also an ideal pre-treatment for zinc-coated steel substrates (HDG)
and zinc based die-castings prior to painting.
Approvals
- Qualicoat approved for chromium free pre-treatment - material registration No. A-045
- GSB Approval (249b)
Features
- Chrome-free formulation – highly reduced waste water and disposal costs compared to
conventional chrome pre-treatment systems - Typical coating weight 0.10 – 0.15 g/m2
- Suitable for spray and immersion application
- High corrosion performance and excellent paint adhesion of subsequent coating system
Iridite NR4-T
QUALICOAT APPROVED (A-87)
Iridite NR4-T is a chromium-free, low-temperature, no rinse liquid acid product. It produces conversion coatings with physical properties equal to that of chromate conversion coatings.
The conversion coatings may have a weight ranging from 0.3 to 2 g/m². The coating colour may vary from light to dark green and the constituents of the conversion coating are primarily trivalent chromium compounds. The conversion coating produced is colorless to light blue. Iridite NR4-T needs no rinsing and is non-polluting.
- Qualicoat Approval (A-87)
- Chromium-free formulation – highly reduced waste water and disposal costs compared to conventional chrome pre-treatment systems
- Typical coating weight 50-150 mg/m²
- Suitable for spray, flood and immersion application
- Excellent paint adhesion and corrosion resistance performance
- Presence of coating can be indentified by viewing with the aid of UV light at 366nm
Iridite NR2-I
QUALICOAT APPROVED (A-31)
Iridite NR2-I chromium-free, low-temperature, no rinse liquid acid product. It produces conversion coatings with physical properties equal to that of chromate conversion coatings. Iridite NR2-I forms a tight adhesive bond with aluminum substrates upon drying. The conversion coating produced is colorless to light blue. Iridite NR2-I needs no rinsing and is non-polluting.
- Qualicoat approval for chromium-free pre-treatment material – registration No. A-31
- Chrome-free formulation – highly reduced waste water and disposal costs compared to conventional chrome pre-treatment systems
- Typical coating weight 50-150 mg/m²
- Suitable for spray and immersion application
- Excellent paint adhesion and corrosion resistance performance
Iridite TCP-III
Advantages
Iridite TCP-III provides both high adhesion values for paints and powder coatings as well as excellent corrosion resistance in its own right. This means that even unpainted areas of aluminum are protected against corrosion.
IRIDITE TCP-III is a transparent passivation for Aluminum based on Chrome-III compounds. It can be applied as post-treatment for pure, alloyed and casted Aluminum and give high corrosion resistance also to Cupper containing Aluminum alloys.
Meets environmental directives
Iridite TCP-III is the safe, reliable and cost-effective alternative to chromate based pre-treatments for aluminum and has been developed in response to the ELV, RoHS and WEEE directives.
Iridite TCP-III does not contain Lead, Cadmium, Chromium(hexavalent), Mercury or PBB / PBDE compounds.
Applications
The coating exhibits bare, unpainted, corrosion resistance that is equal to hexavalent chromates on many aluminium alloys. The coating can be used as a final finish and can also serve as a base for paints, high-performance topcoats, powder paints, lacquers, or as a base for rubber bonding.
