Applications - Resus Risycor NV Manuel

■ 5 APPLICATIONS
Risycor is a corrosion monitor for water-based thermal installations.
From studies with regard to corrosion processes in heating
installations and directives (see Chapter 16, Standards and directives),
it has been shown that corrosion is quite a complex phenomenon that
is influenced by many factors. Everyone agrees, however, that the
presence of oxygen in the water system is the main factor responsible
for the uniform corrosion in a system. Based on the electromagnetic
principle, such as used in a proximity switch, Risycor measures the
mass loss of a 50 μm iron coupon with very high accuracy. This unique
method for the measurement of the uniform corrosion is patented
under the patent number EP2081009 (B1).
The major causes of oxygen in the system water are as follows:
(See also the European standard EN14868)
• oxygen ingress due to vacuum zones in the installation, caused by
inadequate pressure maintenance (expansion system);
• oxygen ingress resulting from diffusion through materials that
are not oxygen-tight (plastic pipes, rubber hoses, membranes of
expansion vessels, etc.);
• oxygen in the make-up water due to frequent topping up
(~10 mg/l);
• oxygen in the residual air due to insufficient venting of the system
during initial filling;
• oxygen in the filling water (10 mg/l) during the initial filling;
• open systems!
In some cases, certain chemicals or inhibitors are added to the system
water. These influence the behaviour of the materials of the installation
and the system water, so that we can no longer speak about a uniform
reaction. The measurement results in chemically treated installations
should therefore be interpreted with caution. For more detailed
information about the application of the corrosion monitor, please refer
to www.resus.eu.
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