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Aluminium Anodes


The chemical composition of SYNCOR aluminum anodes is based on the well established Al-Zn-In alloy and it is suitable for most sea water applications. The quality of the anode and especially the alloying procedure is of outmost importance for the performance of aluminum anodes which are generally more susceptible to passivation than zinc. However aluminum alloys have an electrochemical capacity which is more than 3 times greater than the capacity of zinc and it is nowadays the most widely used alloy for the

Cathodic protection of ships and other marine metallic structures.

SYNCOR anodes are manufactured from primary metals of high purity, homogenized in large scale melting furnaces and have pre-casting quality control in order to secure that the concentration of all important elements (either impurities or alloying elements) even in very low concentrations is strictly conforming with the specification.

Other special formulations of Al Alloys are also available but mainly used in special offshore application (protection of sub sea pipelines, jetties etc).

Typical Application

Marine

Oil & Gas

Port & Harbors

Offshore wind farms

Chemical Composition

Element

PL842

ISO15589-2

EN12496 A3

Zinc

3.0-5.0%

2.5-5.75%

4.75-5.75%

Indium

0.016-0.040%

0.16-0.40%

0.16-0.20%

Silicon

<0.08%

<0.12%

0.08-0.012%

Iron

<0.09%

<0.09%

<0.06%

Copper

<0.01%

<0.003%

<0.0035

Cadmium

<0.002%

<0.0025

Other single

<0.02%

<0.02%

<0.02%

Total Others

<0.10%

<0.10%

<0.055

Aluminium

Balance

Balance

Balance

Electrochemical characteristics

Capacity min

2500 Ahr/Kg

2500 Ahr/Kg

2500 Ahr/Kg

Potential (Ag/AgCl)

-1.09V

-1.09V

-1.09V

Consumption rate

3.5Kg/year

3.5Kg/year

3.5Kg/year

In order to improve anode performance and guarantee that concentration of residual elements is low enough, we use high purity primary aluminum row materials to produce our alloys.

Bismuth, Gallium and Manganese can further enhance the de-passivating action of Indium and improve the dissolution pattern of the anode.





Vessels & Shipbuilding

Flush mounted anodes

Weld On Type

Type

Anode (mm)

Net Weight(kg)

Gross Weigh(kg)

A15

230X78X37

1.1

1.5

A28

290X100X50

2.3

2.8

Type

Anode (mm)

Net Weight(kg)

Gross Weigh(kg)

A30

275X128X32

2.7

3.5

A60

450X100X62

5.0

6.2

A100

550X128X50

8.5

9.9

A120

555X132X68

10.3

11.8

A140

660X132X68

12.3

14.1

A150

920X128X48

13.0

15.0

A175

920X128X52

14.8

17.5

A230

920X128X71

20.3

23.0

Bolt-on type

Type

Dimensions (mm)

Pitch (mm)

Net (kg)

Gross (kg)

B2A

150X70X20

80

0.5

0.6

B3A

200X100X20

110

1.1

1.2

B4A

200X100X30

110

1.4

1.5

B5A

200100X40

110

1.8

1.9

B8A

300X150X25

160

2.7

3.0

B9A

300X150X30

160

3.0

3.3

B10A

300X150X40

160

4.2

4.5

B11A

300X150X50

160

5.1

5.4

B12A

300X150X60

160

6.3

6.6

B13A

300X150X70

160

7.4

7.7

B14A

300X150X75

160

8.1

8.5

B15A

300X200X40

160

5.3

5.6

B16A

300X200X45

160

6.3

6.6

B17A

300X200X50

160

7.3

7.6

B18A

300X200X55

160

8.3

8.6

B19A

300X200X60

160

9.3

9.6

B20A

300X200X65

160

10.3

10.6

Stand-off anodes

Type

Dimensions (mm)

Net (kg)

Gross (kg)

AT30

220X65+50)X75

2.5

3.0

AT50

380X(65+50)X75

4.3

5.0

AT80

610X(65+50)X75

7.1

8.0

AT110

765X(65+50)X75

8.9

10.0

AT130

630X(85+75)X95

12.4

13.3

AT159

750X(85+75)X95

14.5

15.6

AT210

1000X(85+75)X95

19.3

20.6

AT250

1220X(85+75)X95

23.5

25.0

AT310

1500X(85+75)X95

29.0

30.7

AT160

1500X(60+45)X68

13.5

15.3

AT180

1500X(60+45)X68

15.5

17.3

Pit guard anodes

Type

Dimensions (mm)

Net (kg)

Gross (kg)

ATP30

220X65+50)X75

2.5

2.9

ATP50

380X(65+50)X75

4.3

4.8

Offshore & Harbour

There are several different anode types to meet structural requirements for a given anode location. Some of the more popular anode types are listed below:

Type

LXWXH (mm)

OD (mm)

NW (kg)

ASOE350

1300X101X101

20

35

ASOE800

2360X114X114

25

80

ASOE500

1300X120X120

20

50

ASOE680

1520X133X127

20

68

ASOE1190

1525X184X159

25

119

ASOE1480

2373X160X162

60.3

148

ASOE1750

2500X190X190

114.3

175

ASOE2400

2622X210X100

114.3

240

ASOE3300

2372X252X244

114.3

330

ASOE4350

2910X254X257

114.3

435

ASOE5650

2973X283X283

114.3

565


Tapered, weld half shell bracelet anode Type BTW

Square, Bolted half shell bracelet anode Type BSB

Square segment , Welded half shell bracelet anode Type BSG

Tapered, Bolted half shell bracelet anode Type BTB

Square, hinged and bolted half shell bracelet anode Type BSH

Square, Welded half shell bracelet anode Type BSW

Trapezoidal anode flush mounted type flat bar

Trapezoidal anode stand off type with double crank flat bar

Type SOF

Trapezoidal anode with tubular insert protruding from doth ends

Type SOS

Trapezoidal anode with “cowhorn” tubular insert protruding from back face

Type SOB

Trapezoidal anode with “goalpost” tubular insert protruding from back face

Type SOG

Trapezoidal anode with “cowhorn” tubular insert protruding from both ends

Type SOE

The steel insert may have the form of a tube, a rod or a plate. The appropriate insert, in terms of mechanical strength and the requirements of each structure, is defined by the weight as well as the size of the anode.


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