April Featured Product of the Month Model IT

EDI’s permanent portable reference electrode, Model IT, is used to make potential readings in any application where a standard, liquid-junction portable reference electrode is presently being used. The Model IT contains a gel rather than a liquid so it can be used in all positions. The gel provides long maintenance-free service since it does not require refilling or cleaning. Soil contact is through a hardwood plug which offers several advantages over ceramic membranes: it will not clog as readily, it is resistant to salt blockage, and it can be reworked by light sanding or cutting if it becomes contaminated with oil. The Model IT has a twenty year design life and an indefinite shelf life if the end cap is in place. Gelled copper/copper sulfate (CUG) electrodes have a blue housing while gelled silver/silver chloride (AGG) electrodes have a light grey housing. Both models have a 1/4 – 20 threaded stud termination.

February Featured Product of the Month Model UC

Our concentric coupon, Model UC, is designed to make potential measurements that are substantially free of IR-drop error without either interrupting current or disconnecting the coupon. It is known as a Concentric CP coupon because the potential measuring ports are located in the center of the coupon, well away from IR drop fields in the environment. This design is preferred for locations where interrupting currents or disconnecting the coupon to make measurements is not practical. It is particularly well suited for use with remote monitoring units. EDI’s concentric CP coupon may be installed at the base of a test station where access through a soil tube is used for making potential measurements. This product may also be ordered with a contained packaged zinc reference electrode which eliminates the need for access through a soil tube. Either version can be ordered with a 1 sq. cm. coupon for measuring AC current density.





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January Featured Product Model UT

The environmental conditions beneath an aboveground storage tank make it very difficult to obtain potential measurements. The sand is dry when the electrode is first installed. Cathodic protection currents and/or heat from the product further dries out the sand sharply increasing resistivity. A permanently installed reference electrode can completely dry out in this environment and the absence of moisture in the area will prevent it from rewetting. Consequently, electrodes in such locations may last only a few years. Where potential measurements throughout the life of an AST are desired, a preferred solution is to use our Undertank Reference Electrode (Model UT).

The Undertank Reference Electrode is placed in a slotted pipe installed in the sand pad beneath the tank bottom. When bottom potential measurements are needed, the electrode is slowly pulled through the pipe to produce a potential profile. An alternate design with a threaded coupling rather than an eye-bolt can be used in those cases where it is necessary to push the electrode into the pipe. Between measurements, the electrode can be either left at one end of the slotted pipe or used to develop a potential profile in another tank.

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EDI CEO, Jim Diamond will be guest speaker

Jim Dimond, President of Electrochemical Devices, Inc., will address the Western New York corrosion committee on Thursday December 13th at 10 AM. The meeting will be held at:

Leisure’s Restaurant
6001 Big Tree Road
Lakeville, NY 14480
WebSite: http://www.leisuresrestaurant.com/

Title: Coupon Technology – An Overview

Jim will address the reason for using, where to use, and where to not use Cathodic Protection Coupons. He will discuss installation procedures as well as proper interpretation of data collected from Cathodic Protection Coupons. He will explain advantages of the Concentric Coupon with emphasis on the elimination of an IR component even where there are local current sources. He will explain interrupting CP current with a magnetic switch.

Prior to becoming President of EDI, Jim was president of Dimondale Co. Inc. which designs and manufactures cathodic protection products. Previously, he oversaw reference electrode manufacturing for Harco, Inc. He has over 40 years’ experience in cathodic protection including product design, manufacturing, and field engineering.

Electrochemical Devices, Inc. (EDI) was founded in 1986 and specializes in the design and manufacture of a variety of products for monitoring and controlling corrosion, including cathodic protection coupons. They provide the concentric coupon and a magnetically operated switch to connect the coupon and structure.