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Sacrificial Anodes Material Specification

Alloy Anodes

Material Specification

Anode Performance Data

Zinc Alloy Anodes

Zinc Alloy Anodes (%)
ETC's Zinc anodes (ZINODE) comply with US Military Specification 18001 K. It is a reliable anode material 99.995% pure, and to overcome the small impurities always present in the base material, a small amount of Aluminium is alloyed in each melt and a uniform corrosion pattern with non-adherent products is assured by the addition of a small amount of cadmium.

ZINC, Al-Cd Alloy (ZINODE) Alloy Composition by weight (%)
Cu	0.005 max.
Al	0.10 - 0.50
Fe	0.005 max
Cd	0.025 - 0.05
Pb	0.006 max.
Others (total)	0.01 max.
Zn	Remainder

Anode Performance Data (%)
Capacity	780 Amp-Hrs/Kg
Efficiency	95 %
Closed Circuit Potential:-1.0 Volt (against Ag/AgCI ref.elec)

Aluminium Alloy Anodes

Aluminium Alloy Anodes (%)
ETC's Aluminium anodes (ETC III) is an Aluminium-Zinc-Indium alloy, which complies with DNV specifications and is an internationally accepted and eco-friendly indium activated Aluminium Alloy. Originally developed and introduced in 1960 by Mitsubishi Corporation, the base material is of 99.85% purity and several companies throughout the years have refined the composition to give enhanced performance to what it is today

ALUMINIUM, Al-Zn-in-Alloy (ETC III) Confirming to DNV Alloy composition by weight (percentage)
Cu	0.005 max.
Zn	2.0 - 5.0
Fe	0.09 max
In	0.01- 0.04
Si	0.10 max
AI	0.01 max.
Zn	Remainder

Anode Performance Data (%)
Capacity	2500 Amp-Hrs/Kg
Efficiency	90%
Closed Circuit Potential:-1.0 Volt (against Ag/AgCI ref.elec)

It has proved to be reliable and efficient seawater anode and has a driving voltage of almost 300 millivolts against protected steel and delivers minimum 2500 ampere-hours per kilogram

ET Anodes

ET Anodes (%)
ET Anode is a Zinc sacrificial anode alloy designed to afford protection to steel structures whilst operating in environments of elevated temperature. The alloy is targeted to be cadmium free and environmentally friendly. Anode Performance Data detailed below are given as minimum values.

Zn - Al - Mg Alloy(ZINODE) Alloy Composition by weight (%)
Al	0.10 – 0.28
Mg	0.03 – 0.18
Cd	0.001 max
Fe	0.004 - 0.07
Cu	0.001 max
Pb	0.006 max.
Others (total)	0.006 max.
Zn	Remainder

Specific Gravity	7, 120 kg/ m³

Anode Performance Data (%)
	20⁰C	40⁰C	60⁰C	80⁰C
Capacity (Amp Hrs./ Kg)	780	780	690	690
Consumption Rate (kg/ A Year)	11.2	11.2	12.7	12.7
Closed Circuit Potential (Volts) (w.r.t Ag/AgCl ref. elec.)	-1.03	-1.03	-0.97	-0.97

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Industrial Anodes
Pre-packaged Magnesium anodes are the most widely used for soil applications to achieve practical current output in resistive soil applications. Zinc anodes come bare, pre-packed and ribbon type, in electrolyte with a resistivity of less than 15 ohm.m, zinc anodes could be considered.

The magnesium is available in two grades, high purity and high potential. The latter are primarily for use in higher resistivity soils. Anodes are supplied packaged in a cotton bag containing a backfill of gypsum, bentonite and sodium sulphate which improve performance by retaining moisture thus reducing resisitivity of the electrolyte local to the anode.

ETC can also provide Magnesium /Zinc anodes of other compositions to suit the requirements of various sites and structures.

Description                     Specification
Item                                  Anode
Type                                  Pre-packaged Magnesium Anode
Anode Chemical              Aluminium        0.05% max
                                           Zinc                     0.03% max
                                           Manganese        0.03% max
                                           Copper                0.02% max
                                           Silicon                0.05% max
                                           Iron                     0.03% max
                                           Others                0.03% max
                                           Magnesium       Balance

Backfill Materials           75% Gypsum
                                            20 % Bentonite
                                            5% Sodium Sulphate

Attached Cable Yes

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R Shape

S Shape

D Shape	Weight (kgs)	A (mm)	B(mm)	C(mm)	Insert
E- MAG-D41	4.1	69.9	76.2	560	strip
E- MAG-D91	9.1	63.5	63.5	1505	strip
E- MAG-D77	7.7	88.9	95.25	657.2	strip
E- MAG-D145	14.5	139.7	146.05	523.9	strip
E- MAG-D218	21.8	139.7	146.05	765.2	strip

Type	Net Wt (kgs)	Gr. Wt (kgs)	A (mm)	B(mm)	C(mm)	Insert dimension
E- MAG-SO227	2.27	2.3	76	76	191	strip
E- MAG-S41	4.1	4.2	71.1	50.8	711	strip
E- MAG-S77	7.7	7.8	96.5	76.2	650	strip
E- MAG-S100	10	10.2	127	127	533	strip
E- MAG-S145	14.5	14.7	127	127	800	strip

Type	Net Wt (kgs)	Gr. Wt (kgs)	Dia	Length 1.7v (mm)	C(mm)	Insert dimension
E- MAG-R36	3.6	3.7	114	202	193	25 x 2 x 190
E- MAG-R50	5.0	5.1	114	280	268	25 x 2 x 195
E- MAG-R77	7.7	7.8	114	431	412	25 x 2 x 332
E- MAG-R145	14.5	14.7	146	494	472	25 x 2 x 428
E- MAG-R273	27.3	28.2	114	1528	1462	25 x 3 x 1300

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