MMO Tubular Titanium String Anodes
Introduction
A range of dimensionally stable multipurpose tubular titanium anodes for use in a variety of application and environments. The anode may be used in vertical or horizontal groundbeds and in fresh water, sea water soils, muds, etc.
The active coating consists of Iridium and Tantalum Oxides (as well as other minor oxides) which renders the anodes suitable for both oxygen and chlorine evolution reactions. The titanium tube has a wall thickness of 0,89mm.
Cable - Anode Connection
Particular attention has been paid to the integrity of the cable to anode connection, for which there are three levels of insulation. Firstly, there is a heat shrink sleeve over the connection from the cable to titanium insert. Secondly the tube is filled with epoxy resin, thirdly a rubber stoper is placed at the ends of the tube.
Tests have shown that each of the levels of insulation acting on their own provide a barrier against the ingress of moisture.
Enlarged Sectional View |
- Double Insulated Copper Cable.
- Rubber End Cap (1st Seal).
- Cast Resin (2nd Seal).
- Heat Shrink (3rd Seal).
- Titanium Insert forced into tube to ensure good electrical contact with the tube.
- Swaged section of Titanium tube to ensure good electrical contact with the Insert.
- Titanium Insert crimped over Copper Cable.
- MMO coated Titanium Tube.
|
| NOTE |
- |
Minimum Breaking Strength of the Cable/Anode Connection |
| |
|
| |
- |
16mm OD |
> |
770kg |
| |
- |
20mm OD |
> |
960kg |
| |
- |
25mm OD |
> |
1200kg |
|
| |
- |
Anode to Cable electrical resistance < 0.001 Ohm |
Performance Data
Details pertaining to the performance is outlined below.
Dia x Length
(mm) |
Max Current
(Amps)
|
| Oxygen |
Chlorine |
| 16 x 1000 |
5 |
30 |
| 19 x 1000 |
6 |
36 |
| 25 x 1000 |
8 |
48 |
| 16 x 500 |
2.5 |
15 |
| 19 x 500 |
3 |
18 |
| 25 x 500 |
4 |
24 |
|
Life at
Max Current (years) |
| Oxygen |
Chlorine |
| 20 |
15 |
| 20 |
15 |
| 20 |
15 |
| 20 |
15 |
| 20 |
15 |
| 20 |
15 |
|
Anodes with other dimensions or different capacities (amp years) are available on request.
The capacity has been determined from tests carried out in sulphuric acid and sodium chloride solutions, for oxygen and chlorine evolution reactions respectively. The life with coke backfill will be higher, but it is difficult to predict in situations where both oxygen and chlorine are evolved. It decreases with the increasing oxygen evolution and vice versa, and for any given situation the value will be intermediate between that for pure oxygen and that for pure chlorine evolution.
For both types of evolution, the consumption rate is approximately constant in the range 5-50ºC, but increases at higher temperatures. At 90ºC, the consumption is approximately double that at 50ºC.
Cable and Centralisers
Cable sizes ranging from 6mm² to 50mm², depending on the tube diameter, are available. The cable can be supplied with an insulation of XPLE/PVC, or EPR/CSPE or Kynar/HMWPE.
Anode strings are supplied either with a single or double tail. Centralisers and bottom weights are also available as standard items.
MMO Titanium Mesh Anodes
Enlarged Section
Mesh
Dimensions
mm |
Canister
Dia x Length
mm |
Weight
Anode & Canister
filled with Pet.
Coke Breeze |
Anode Amp
Years |
| 40 x 1220 |
125 x 2000 |
33kg |
60 |
| 40 x 1220 |
200 x 2000 |
63kg |
60 |
| 40 x 1220 |
300 x 2000 |
130kg |
60 |
|
