Diaphragm Cell Anode Coatings
ELTECH Gruppo De Nora invented EC200 coating specifically
for chlor-alkali diaphragm cells. EC200 is designed for maximum
utilization
of its precious metal component. It has demonstrated long life
and stable voltage performance in commercial service. De Nora
is the only company that offers a coating like EC200 to diaphragm
cell operators.
Service Life of Diaphragm Coatings
Plant
|
Years
of Service
|
Current
Density(kA/m2)
|
|
A
|
16-20
|
2.7
|
|
B
|
17+
|
2.7
|
|
C
|
20-25
|
2.3
|
|
D
|
24
|
1.6
|
Effect of Operation on
Coating Oxygen Generation
|
De Nora has coatings in diaphragm
cell rooms located around the world.
We have the experience to help operators with the performance
of their anodes.
For example, De Nora has demonstrated to the industry
why new coatings perform differently in terms of oxygen
performance than aged coatings with iron deposits.
|
Membrane Cell Anode Coatings
De Nora offers three coatings with long lifetimes
and low operating potentials for service in chlor-alkali membrane
cells.
o EC 300 is De Nora’s standard membrane coating. It offers low oxygen
and low chlorate inefficiency
- EC305 offers the lowest oxygen with slightly higher chlorate
inefficiency.
- Millennium 3™ (M3) is a patent pending coating that
is the lowest cost membrane coating in the world.
De Nora has re-coated
anode structures from all of the major cell technology
providers:
- UHDE
- CEC
- Asahi Glass
- Lurgi
|
- ELTECH
- Asahi Kasei
- Ineos
- Ionics
|
|
Service Life of Membrane Coatings
Plant
|
Years
of Service
|
Current
Density(kA/m2)
|
A
|
16-18
|
4-5
|
B
|
6-10
|
4-5.5
|
C
|
6-10
|
4-5.5
|
|
Effect of Coating Type and
pH on Oxygen Generation
 |
M3 is the Lowest Cost
Membrane in the World
|
|
Chlorate Cell Anode Coatings
De Nora offers several coatings for service in chlorate cells.
EC100 has a long history of good performance in chlorate service.
EC120 offers reduced oxygen performance and is more resistant
to contamination.
Service Life of Chlorate Coatings
Plant
|
Years
of
Service
|
Current
Density(kA/m2)
|
A
|
20-22
|
2.8
|
B
|
19+
|
2.3
|
C
|
14+
|
3.9
|
O2 Generation under Laboratory
Conditions for Different Coatings
|
De Nora is in the process of commercializing the next
generation of chlorate coatings.
EC5230 has been designed to operate at low voltage from
start-up to end of life while generating less oxygen
than any other coating on the market.
|
|
