Selecting The Right System For Boats and Ships

The cathodic/corrosion protection is impressed onto the metals by a platinized-titanium anode, which is mounted on the bottom of the hull near the stern. The anode is powered by the system controller.

The amount of corrosion protection, the level of electric current in milliamperes (or if it's a ship, in amperes), is in direct proportion to the area of all exposed metals underwater that have been commonly bonded/connected together for protection.

Corrosion protection becomes effective when 1-1/2 milliamperes of current is impressed onto and is flowing through each square foot of metal.

1-1/2 milliampere is one and one half thousandth of an ampere of electric current. A very small amount.

The term"exposed metal" is especially important to understand for people who own vessels with steel or aluminum hulls. A properly painted/coated hull is not "exposed" unless there are holidays, places where the finish has come off and the metal is exposed. When calculating the area of exposed metals, the hull is generally not included unless it is un-painted.

Add the approximate area of the propeller blades (both front and back surfaces) to the rudder, again both sides, and the area of the struts, the shafts, and any other submerged metal parts that can be bonded together.

An example would be 20 square feet of metal being protected with 30 milliamperes of current.

The Kel Marine ICCP 2504 platinized-titanuim anode can be operated at a maximum current level of 3.8 amperes, 3800 milliamperes.

Sufficient to protect 2500 square feet of metal.

Kel Marine ICCP controllers can be configured for current ranges from 50 milliamperes to 3500 milliamperes (3.5 amps).

Higher current levels are available on special order.

Perform Your Own Corrosion Test

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