CATHODIC PROTECTION DIVISION - TECHNICAL

CATHODIC PROTECTION DIVISION - TECHNICAL

Anode Alloy Chemical Composition & Performance Data

Chemical Composition of Aluminum Anodes

Alico aluminum anodes can be manufactured as per Galvalum III (eqv.), DNV, ISO, Alanode Standards or clients specifications

 

 

STANDARD CHEMICAL COMPOSITION OF ALUMINUM ANODES
Standard
Galvalum III (Eqv.)
DNV & ISO
Alanode
Elements
% (By Weight)
% (By Weight)
% (By Weight)
Zn
2.0 - 6.5
2.5 - 5.75
0.50 - 5.00
ln
0.01 - 0.02
0.016 - 0.04
0.005 - 0.05
Si
0.08 - 0.20
0.12 Max.
0.10 Max
Fe
0.12 Max.
0.09 Max.
0.13 Max
Cu
0.006 Max
0.003 Max
0.01 Max
Cd
 
0.002 Max
 
Others (each)
0.02 Max.
0.02 Max.
0.02 Max.
Others (Total)
0.06 Max.
 
 
Al
Remainder
Remainder
Remainder

 

 

Electrochemical Characteristics of Aluminum Anodes

Alico aluminum anodes can provide complete Cathodic Protection over along design life in the harshest operating environments.

Alico aluminum anodes electrochemical characteristics are listed below.

GENERAL PERFORMANCE DATA FOR ALUMINUM ANODES
Operating Environment
Seawater at 23 °C
Open Circuit Potential w.r.t. Ag/AgCl
More negative than (-1.1v)
Closed Circuit Potential w.r.t. / AgC Reference Electrodel
More negative than (-1.05v)
Anode Capacity (A.hr/Kg)
2550 - 2750

Chemical composition of Zinc Anodes

Alico Zinc anodes can be manufactured as per US Mill Spec, ASTM Standards or clients specifications.

STANDARD CHEMICAL COMPOSITION OF ZINC ANODES
Standard
US Mill Spec
ASTM B148-II
Element
% (By Weight)
% (By Weight)
Al
0.10 - 0.50
0.005 Max
Si
0.125 Max.
 
<
Cd
0.025 - 0.15 Max
0.03 Max.
Fe
0.005 Max.
0.0014 Max.
Pb
0.006 Max.
0.003 Max.
Cu
0.005 Max.
0.002 Max.
Zn
Remainder
Remainder

Electrochemical Characteristics of Zinc Anodes

Alico Zinc anodes can provide complete Cathodic Protection over a long design life in the harshest operating environments.

Alico zinc anodes electrochemical characteristics are listed below.

GENERAL PERFORMANCE DATA FOR ZINC ANODES
Operating Environment
Sea Water at 20oC
Open Circuit Potential w.r.t. Ag/AgCl
More negative than (-1.1v)
Closed Circuit Potential w.r.t. / AgC Reference Electrode
More negative than (-1.05v)
Anode Capacity (A.hr/Kg)
780 Min.