LPR Corrosion Meter
- Linear Polarisation Resistance technique
AE-Corr-Meter AECO 110 measures corrosion rate of metallic materials in
corrosive environments. Its proprietary polarising circuit is specially
designed to minimise errors due to the presence of corrosion layers on the
electrode surface while its high input impedance extends measurements validity
to low conductivity waters. A probe is installed into a process or laboratory
environment and connected to instrument by means of a cable. The measurement
is carried out instantly and directly gives the corrosion penetration rate in
mm/y or mils/y independently from the nature of the metal examined. The
AE-Corr-Meter AECO 110 is a rechargeable battery powered portable instrument,
which can read any number of probes at various locations.
The LPR 801 is simple to operate: just set TAG number push the Measure key: the instrument will give a corrosion rate reading and automatically memorises potential difference between working and reference electrode of the three (standard) electrode probe installed in the process stream. An anodic current ramp is automatically applied to the working electrode by the auxiliary electrode; the result is an increasing potential difference between the polarised electrode (working) and the unpolarised one (reference). The reference electrode is connected to a high impedance instrument so as to measure correctly the potential difference. The ramp stops automatically at 10 mV potential shift to avoid IR-drops and errors resulting from presence of redo couples at the electrode surface. The LPR 801 performs a convergent autorange algorithm that can found quickly the best scale of measure.
The AE-Corr-Meter AECO 110 measures corrosion rates in all aqueous systems also with low conductivity (water, saline solutions, acid, bases, water mixtures of organic compounds, etc.). It is most effective in the application of:
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