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)
Grade	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
Grade	-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)
Size	Length(upper bottom+lower bottom)Height	Weight (kg)
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 customer’s 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
Alloy Type	Zn	In	Cd	Sn	Mg	Si	Ti	Si	Fe	Cu	Al
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
Chemical Element	Al	Cd	Fe	Cu	Pb	Si	Zn
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

Working Potential

Actual Capacitance

(Ah/kg)

Consumption Rate

(Ah/kg)

Current Efficiency

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 (%)
Product Name	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 Silicon	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
Number	Specification mm	Weight kg	Section mm2	Length mm
1	Φ50×1500	22	25	1000
2	Φ75×1200	40	25	1000
3	Φ75×1500	50	25	1000
4	Φ100×1500	90	25	1000

Electrochemical Properties

Performance /Type /Indicator	Open circuit potential -V(SCE)	Working potential -V(SCE)	Actual capacity A·h/kg	Current efficiency %	Dissolution condition
Ordinary aluminum alloy anode	1.10-1.18	1.05-1.12	≥2400	≥85	Corrosion products are easy to fall off and the surface dissolves evenly.
High efficiency aluminum alloy anode	1.10-1.18	1.05-1.12	≥2600	≥90
Highly activated aluminum alloy anode	1.45-1.50	1.40-1.45	≥2080	≥70

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

Galvanic Anode