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Galvanic Anode


Galvanic Anode

Galvanic anode is also called 'sacrificial anode', is used to protect the hulls of ships, water heaters, pipelines, distribution systems, above-ground tanks, underground tanks, and refineries. The anodes in sacrificial anode cathodic protection systems must be periodically inspected and replaced when consumed.


Classified by Usage:

1. Welding Type Sacrificial Anode for Ship Hull (Single Iron Foot)

2. Welding Type Sacrificial Anode for Ship Hull (Double Iron Foot)

3. Bolt Connection Type Sacrificial Anode for Ship Hull

4. Sacrificial Anode for Ballast Water Tank

5. Sacrificial Anode for Offshore Engineering Facilities

6. Sacrificial Anode for Harbor Engineering Facilities

7. Strip Shape Sacrificial Anode for Seawater Cooling System

8. Disc Shape Sacrificial Anode for Seawater Cooling System

9. Sacrificial Anode for Storage Tank


Classified by Shapes: Plates, Rods, Extruded Ribbon, Blocks


Classified by Main Material:

1.Magnesium Alloy Sacrificial Anode
Magnesium alloy sacrificial anode is suitable for the anti-corrosion protection of oil, gas, water supply and drainage pipelines in underground fresh water, underground cables, chemical industry, communication, harbor, ship, reservoir and other projects.


Chemical Composition

Grade

Alloying Elements

Impurity Elements (no greater than)

Al

Zn

Mn

Mg

Fe

Cu

Ni

Si

Ca

MGAZ63B

5.3-6.7

2.5-3.5

0.15-0.60

margin

0.003

0.01

0.001

0.08

-

MGAZ31B

2.5-3.5

0.60-1.4

0.20-1.0

margin

0.003

0.01

0.001

0.08

0.04

MGM1C

0.01

-

0.50-1.3

margin

0.01

0.01

0.001

0.05

-

MG

0.02

0.03

0.01

99.9%

0.005

0.004

0.001

0.01

-

Electrochemical Performance

Grade

Open Circuit Potential

Closed Circuit Potential

Actual Capacitance

Current Efficiency

-V,Cu/CuSO4

-V,Cu/CuSO4

-(A*h/kg)

%

MGAZ63B

1.57-1.67

1.52-1.57

1210

55

MGAZ31B

1.57-1.67

1.47-1.57

1210

55

MGM1C

1.77-1.82

1.64-1.69

1100

50

Standard Specification for Magnesium Anode

Size

Specification

Weight (kg)

Length*(upper bottom+lower bottom)*Height

MG-22

700(130+150)125

22.00

MG-14

700(120+100)102

14.00

MG-11

700(110+90)88

11.00

MG-8

700(95+75)75

8.00

MG-4

350(95+75)75

4.00

MG-2

350(55+60)55

2.00

Note: size can also be produced according to customers requirements



2.Aluminum Alloy Sacrificial Anode
Aluminum-Zinc-Indium alloy sacrificial anode is suitable for the metal cathodic protection of ships, mechanical equipment, ballast water tank, tank inner wall, coastal facilities, submarine pipeline, wharf steel pile, offshore platform and others in seawater medium.

Chemical Composition

Alloy Type

Zn

In

Cd

Sn

Mg

Si

Ti

Impurity,

Al

Si

Fe

Cu

Al-Zn-In-Sd

2.5-4.5

0.018-0.050

0.005-0.020

-

-

-

-

0.10

0.15

0.01

margin

Al-Zn-In-Sn

2.2-5.2

0.020-0.045

-

0.018-0.035

-

-

-

0.10

0.15

0.01

margin

Al-Zn-In-Si

5.7-7.0

0.025-0.035

-

-

-

0.10-0.15

-

0.10

0.0-15

0.01

margin

Al-Zn-In-Sn-Mg

2.5-4.0

0.020-0.050

-

0.025-0.075

0.50-1.00

-

-

0.10

0.15

0.01

margin

Al-Zn-In-Mg-Ti

4.0-7.0

0.020-0.050

-

-

0.50-1.50

-

0.01-0.08

0.10

0.15

0.01

margin

Electrochemical Properities

Type/Index/Performance

Open Circuit Potential-V(SCE)

Working Potential-V(SCE)

Actual Capacitance(A.h/kg)

Current Efficiency%

Dissolution Status

Ordinary Aluminum Alloy Sacrificial Anode

1.10-1.18

1.05-1.12

2400

85

Corrosion products are easy to fall off, the surface dissolution is even

High Efficiency Aluminum Alloy Sacrificial Anode

1.10-1.18

1.05-1.15-2

2600

90

Highly Activated Aluminum Alloy Sacrificial Anode

1.45-1.50

1.40-1.45

2080

70



3.Zinc Alloy Sacrificial Anode
Zinc-Aluminum-Cadmium Sacrificial anodes are suitable for the cathodic protection of ships, mechanical equipment, offshore engineering and harbor facilities in fresh water or seawater medium and the pipelines and cables in low resistivity soils.

Chemical Composition (%)

Chemical Element

Al

Cd

Impurity Element

Zn

Fe

Cu

Pb

Si

Content

0.3~0.6

0.05~0.12

0.005

0.005

0.006

0.125

margin


Electrochemical Properties

Electrochemical Properties

Open Circuit Potential

V

Working Potential

V

Actual Capacitance

(Ah/kg)

Consumption Rate

(Ah/kg)

Current Effiency

%

Dissolution Performance

In Sea Water

(1mA/cm2)

-1.09~-1.05

-1.05~-1.08

780

11.23

95

Surface dissolution is even, while the corrosion products are easy to fall off

In Soil

(0.03mA/cm2)

-1.05

-1.03

530

17.25

65


Electrochemical Properities

Type/Index/Performance

Open Circuit Potential-V(SCE)

Working Potential-V(SCE)

Actual Capacitance(A.h/kg)

Current Efficiency%

Dissolution Status

Ordinary Aluminum Alloy Sacrificial Anode

1.10-1.18

1.05-1.12

2400

85

Corrosion products are easy to fall off, the surface dissolution is even

High Efficiency Aluminum Alloy Sacrificial Anode

1.10-1.18

1.05-1.15-2

2600

90

Highly Activated Aluminum Alloy Sacrificial Anode

1.45-1.50

1.40-1.45

2080

70


4.Impressed Current High Silicon Cast Iron Anode
High silicon cast iron anodes are widely used for cathodic protection of external electric current in offshore oil drilling platforms, underground pipelines, and the underground cable facilities.



Chemical Composition

Product Name

Chemical Element (%)

Impurity Content (%)

Si

Cr

Mn

C

Fe

P

S

High Silicon Cast Iron

14~16

-

0.6~0.8

0.8~1.05

margin

0.25

0.1

Ferrochrome Sillicon

14~16

4.0~4.5

0.6~0.8

0.8~1.05

margin

0.25

0.1


Electrochemical Performance

Product Name

Use Environment

Working Current Density (A/m2)

Consumption Rate (kg/A.a)

High Silicon Cast Iron

In seawater

50

0.3~1.0

Ferrochrome Silicon

In fresh water/soil

10

0.05~0.2


Specifications and Sizes

Number

Specification mm

Weight kg

Anode Cable

Section mm2

Length mm

1

501500

22

25

1000

2

751200

40

25

1000

3

751500

50

25

1000

4

1001500

90

25

1000


Electrochemical Properities

Type/Index/Performance

Open Circuit Potential-V(SCE)

Working Potential-V(SCE)

Actual Capacitance(A.h/kg)

Current Efficiency%

Dissolution Status

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1.10-1.18

1.05-1.12

2400

85

Corrosion products are easy to fall off, the surface dissolution is even

High Efficiency Aluminum Alloy Sacrificial Anode

Efficiency Aluminum Alloy Sacrificial Anode

1.10-1.18

1.05-1.15-2

2600

90

Highly Activated Aluminum Alloy Sacrificial Anode

1.45-1.50

1.40-1.45

2080

70


Galvanic Anode

High Silicon Cast Iron Anode


Galvanic Anode

Magnesium Alloy Sacrificial Anode for Cathodic Protection


Galvanic Anode

Zinc Alloy Sacrificial Anode for Cathodic Protection

Galvanic Anode

Aluminum Alloy Sacrificial Anode for Cathodic Protection




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