Petrolite Corporation

Allen L Savage

Jack B Harrell, Jr

Rudolf H Hausler

Rudolph H Hausler

A system, method and probe for monitoring the corrosion rate of different metals in identical corrosive fluids and under identical conditions, such metals being employed as electrodes other than reference electrodes in a probe having also a reference electrode. The preferred probe comprises a probe body holding at least four electrodes, where one is placed in the center and the others around it in a circle. The center electrode is preferably used as a permanent reference electrode. Each electrode on the circle can then be connected in turn to a channel on a multistation PAIR meter as test and auxiliary electrodes, whereby the corrosion rate on each of them can be monitored in turn. This arrangement greatly enhances the utility of the multistation PAIR meter and with only two entry ports in a system, all channels can serve to answer specific questions on specific electrodes or metals. The novel probe can also be used with a one channel PAIR meter employed with a multi-station manual switch. In an alternative electrode arrangement, the center electrode is used as a permanent auxiliary electrode while the system itself is used as a reference electrode and a plurality of test electrodes are employed.

Multielectrode probe and circuitry and process pertaining thereto

The corrosion of galvanically coupled metals can be measured and monitored by linear polarization techniques using a test galvanic electrode comprising two individual electrodes of different metals preferably connected end to end with a rigid metallic fastener. The galvanic electrode is treated as a single electrode and can be used as the test electrode in any two or three electrode configuration which includes at least the test electrode and a reference electrode. A three electrode configuration, including also an auxiliary electrode, is adapted for use in combination with the PAIR meter.

Growing community of inventors

St. Louis, MO, United States of America

Allen L Savage