3.4
Safety warnings concerning defective electrical tube heaters
In the event of a defect in the electrical tubular heating element, the M8 thread
bolt of the impressed-current anode and the connecting cable between anode
and potentiostat may carry mains voltage. If these parts are touched, the risk
of a fatal electric shock cannot be excluded. For reasons of safety, the elec-
trical tubular heating element must therefore be disconnected from the power
supply before undertaking any work on the impressed-current anode system.
4
Designated use
The impressed-current anode system CORREX
cathodic corrosion protection system for stainless steel hot-water tanks.
The CORREX
purpose and only in compliance with the present fitting and operating instructions.
Magontec assumes no liability whatsoever for any damage caused by use
other than the designated use or by a failure to observe the present
instructions.
5
Functional principle
The CORREX
and one titanium anode connected with one another by means of a connec-
ting cable. The impressed current is supplied by the interrupter potentiostat
and the protective current is fed into the tank via the virtually wear-free tita-
nium anode. In the process electrochemical reactions take place at the tita-
nium anode (positive pole) and the inner wall of the cathodic tank (negative
pole) resulting in a charge transfer (electrons) to the water-swept inner wall of
the storage tank. Thus the electrochemical surface potential in the area of the
water-swept tank wall is brought down to the point where the corrosion rate of
the steel container wall dies down. Depending on water quality, calcareous
deposits may build up in addition.
The system works as a so-called interrupter potentiostat, i.e. the protective
current flow through the titanium anode is interrupted periodically in short
intervals. During these interruptions, the potential existing between the tita-
nium anode and the inner wall of the hot-water tank is measured and trans-
mitted as actual voltage to the potentiostat where the actual voltage is com-
pared to the reference voltage defined by the potentiostat. The protective cur-
rent supplied is then adjusted in such a way that the actual tank potential cor-
responds to the reference potential.
®
MP 1.9-900 system must therefore not be used for any other
®
MP 1.9-900 system is composed of an interrupter potentiostat
Operating Instructions CORREX
MP 1.9-900 is a permanent
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®
MP 1.9-900
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