Platinized Anodes
De Nora’s mixed metal oxide coated anodes are manufactured by coating a mixture of precious metal oxides on a specially treated precious metal. The coated substrate undergoes multiple thermal treatments at elevated temperatures to gain good bonding properties between the substrate & coating increasing the lifetime of anodes.
Titanium is widely used as substrate material for its well-known characteristics like, resistance to corrosion, resistance to chemical attacks and its high mechanical strength. De Nora’s anodes are in high demand in the global market for its excellent electrolytic properties and low wear rate of the coating.
As it is very expensive, platinum can not be used in its solid form as an anode. So that Platinized Anodes (Pt Anode) are produced by plating platinum (Pt) on a specially treated precious metal substrate by means of electrodeposition process. With this process platinized anodes have all the physical and chemical properties of pure platinum but are more cost effective.
Rotogravure Cylinder Plating Anodes
De Nora’s SYNERGY™/DT anodes have proved to be a viable high performance alternative, to soluble copper nuggets, in the plating of cylinders for the rotogravure printing industry. Today, almost all gravure printing is done using engraved copper cylinders protected from wear by the application of a thin electroplate of chromium. The cylinders used in rotogravure printing can be from three inches in diameter by two inches wide to three feet in diameter by 20 feet wide. It is critical that the plated copper is a uniform thickness across the width of a cylinder because even slight variations in thickness can impact the way an image is transferred to the paper. One industry expert considers the adoption of the SYNERGY™/DT anode technology to be a quantum leap in the rotogravure industry.
Unlike soluble copper anodes, SYNERGY™/DT anodes do not polarize and can therefore operate at higher current densities, which can reduce plating times by a factor of three.
Due to the non-uniform dissolution of the copper nuggets, platers need to over plate in order to achieve a minimum thickness across the width of a cylinder, thus requiring a polishing step to ensure a uniform copper thickness. Given that SYNERGY™/DT anodes maintain their shape, platers are now able to plate to size, thereby drastically, reducing or eliminating the post plate polishing operation to remove modules.
Titanium Advantages
- High corrosion resistance
Good thermal conductivity
Superior catalytic nature
Very good mechanical stability
Uniform current distribution property
Plating on Plastic
De Nora’s GreenChrome™ and Platinum anodes are dimensionally stable, highly conductive and offer a titanium metal structure that provides uniform current distribution and therefore more uniform plating. This is important in industries where key factors are:
The typical plating on plastic process is carried out by electrochemical plating, of at least one metal, on the metalized surface starting from an electrolytic solution. The thin metallic sheet obtained is adherent to and supported by the plastic film. The metallic sheet may be used as current collectors for polymer electrolyte lithium batteries, as multi-layer film used as wrapping material permeable to gases and humidity, as a screen for light, flexible conductors, mobile phone keys, car light cover and antennas, toys, etc.
Electrolytic plating processes are capable of supporting prototype and low volume projects as well as applications with volume requirements in the tens of millions of parts per year. Plating processes include deposition of copper, nickel, tin and gold. De Nora anodes provide high quality plating for fine applications like precious metal plating for jewelry manufacturing.
Steelcord and Wire Plating Anodes
DSA® anodes offer a cost effective alternative and superior product quality for processing electrogalvanized wire. Prior to DSA® anodes, soluble zinc or insoluble lead anodes were the only alternatives for wire plating lines. During electrolysis, zinc and lead anodes change their shape, and in doing so affect the quality and uniformity of the zinc deposition, resulting in non-uniform plating distribution around the circumference of the wire. In many cases, platers are forced to over plate their product to achieve a minimum thickness requirement.
Due to the inherent shortcoming with the zinc and lead type wire plating anodes, De Nora undertook an extensive Finite Element Analysis (FEA) to determine the optimum shape for a wire-plating anode. The graph below illustrates the results of the FEA evaluation.
The results clearly show that the DSA® channel type anode will provide the most consistent current distribution around the wire and hence the most uniform plating. In fact, De Nora’s customers have substantiated the analysis that our wire-plating anode (shown below) yields plating distributions within 0.1% around the circumference of the wire.
Platinum Anodes Brochure |  (175Kb) |
GreenChrome™ Brochure | (201 Kb) |
Auxiliary Anodes Brochure | (207 Kb) |