Anode Technology

Mixed Metal Oxide Anodes / MMO Anodes

MMO anodes used on metal mesh product

Metal oxide anodes are manufactured from precious iridium and ruthenium oxides, sometimes combined with non-precious tantalum and titanium oxides. Solutions of these metals are applied in layers in a multi-stage process; they are transformed in a thermal process into their catalytically effective shape.

    Features include:
  • Long service life in acidic solutions
  • Low organic consumption / low oxygen evolving potential
  • Less costly than PtTi-anodes
  • Lower precious metal consumption
  • Excellent cost-benefit ratio

Platinode® anodes, a product of German engineering, are the most sophisticated platinized titanium anodes available. Conventional anodes are either platinum plated (leaving micro-pores) or clad (leaving micro-cracks). To counteract the aggressive nature of gold or rhodium plating (with the combination of electricity and chemistry both working to shorten the anode’s life), these anodes are plated in a unique molten platinum method – thus avoiding cracks or pores and extending anode life. These anodes are available in a combination of mesh sizes, platinum thicknesses, and single or double-sided coatings.

Platinode platinized titanium anodes used on metal products
    Features include:
  • Extremely low porosity of the platinum coating
  • Anode life 2 to 3 times that of standard platinized anodes
  • High dimensional stability, no need for frames
  • Anodes can be formed to complex shapes
  • Available in three mesh sizes
  • Available in two coating thicknesses
  • Anodes are coated both sides

Platinode 177
Excellent performance with acidic electrolytes

Platinode 167
Excellent performance with alkaline and cyanide electrolytes

Platinode 147
For weak acidic/alkaline electrolytes

Platinode 197
For water electrolysis

Platinode 197SN
High performance in cooling water system

These mixed metal oxide anodes – MMO anodes – are available with various materials and material ratios. The choice of coating – MMO or platinum – and layer thickness is tailored to individual customer requirements; talk with Uyemura about the MMO anode best suited to your process.

Platinized Anodes

187 SO Anodes
Uyemura 187 SO MMO anodes markedly reduce the over-potential for anodic oxygen evolution. Additionally, the excellent stability of the MMO coated titanium anode prevents contamination of the electrolysis system, improving product purity and minimizing maintenance costs.

For acid copper PCB applications, 187 SO MMO insoluble anodes from Uyemura improve copper plating distribution and eliminate nodules. The anode offers a constant area and does not require an anodic film.

The 187 SO anode enhances productivity by eliminating the costly downtime for anode maintenance and dummy plating.

Download the brochure: “Platinized Titanium and MMO Anodes in Electroplating Applications”

Platinode is a trademark of Umicore GmbH and is available throughout North America exclusively from Uyemura.

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For more details, or to arrange test processing, contact your Uyemura representative.