Chlorine - Mercury Cell Anode Coatings

CHLORCOAT™ CP5A or CP1 provide low voltage, long lifetime, short resistant anode coatings for mercury cell technology. 

The Process

In general, mercury cells operate a high current density with an ever present chance of short circuiting between the anodes and the unstable mercury cathode.

An anode system is therefore required that ensures that minimum energy consumption can be achieved by allowing safe and efficient operation of cells at a minimum inter-electrode gap.

INEOS ChlorVinyl's own mercury cellrooms at Runcorn are fully computer controlled, with automatic anode adjustment and the latest CHLORCOAT™  short-resistant anode coatings.

Effects observed around a coated titanium anode blade as it is immersed at increasing depths into a mercury cathode.

Effects of anode immersion in mercury, showing the benefits of CHLORCOAT™ short resistance coating.

The Principle

CHLORCOAT™ short resistance anode coatings work by preventing the mercury cathode from wetting the anode surface so that the brine still circulates around the anode blades during immersion in the mercury.
The magnitude of the current passing is maximised because direct conduction in the form of arcs is eliminated.

The Performance

The highly optimised design of the Channel Blade Anode with its excellent stability, flatness and gas release properties and the CHLORCOAT™ short resistance coating, provide an ideal system for the optimisation of the mercury cell performance.

CHLORCOAT™ short resistant coating can be applied to any design of anode structure to give all the advantages of safe operation at current densities up to the highest values employed and for minimum interelectrode gap.

INEOS Technologies Electrochemical Technology offers a fast and reliable repair service to return any anode structure to the "as new" condition prior to application of the appropriate coating.