Description:
NACE is looking for volunteers who will walk interested parties through a “mini” version of a Cathodic Protection Field. Volunteers will explain what each station does and help the interested party perform tests. The four stations that make up the exhibit and that volunteers will be expected to instruct on are as follows:
1. Soil Resistivity Station which is by far the most basic of all the stations. Here the participant can see what the soil resistivity set up looks like in the field and then has the chance to actually obtain soil resistivity measurements as they would if they were in the field.
2. Pipe Locating and Isolated Flange Station which is next in complexity and time needed to complete. This station allows the participants to perform pipe locating of a below grade structure using real equipment. Then the instructor can demonstrate the isolated/shorted flange and how that would affect the locating process. We should also have an instrument on hand that the participants can utilize to test the isolation of the above grade flange.
3. The last two stations, which will be worked individually but have some correlation, are an Impressed Current and Galvanic CP System on two structures that intersect one another.
A - The Galvanic CP System is on the well-coated structure and consists of four test stations. One of the test stations is shared with the impressed current CP system at their intersection. The testing of this system will be done with interruption (On-Off). The intersection of the two CP systems and structures present the participant with a stray current interference scenario that they will be able to observe through the measurements of the p/s potentials that they take at each test station before and after the interference is introduced. Additionally, the galvanic station has a casing (represented by two casing vents and test leads in a test station) that can be shorted to demonstrate the impact a shorted bare casing would have on the galvanic CP system. Again, the participant will experience the impact of the shorted casing vs. isolated by comparing the p/s potentials they record at the test stations in each case.
B.The Impressed Current CP System gives the participant the chance to see the equipment up close and learn about the function of this system vs. galvanic. This system will be interrupted, and the participants can take p/s potential measurements and record the data. When the stray current interference scenario is active the participants will observe a significant change in the p/s potentials in the region of the line crossing.
Virtual Training Simulators will also be at the back of the field, for interested parties to review.
Must work in Cathodic Protection industry and able to explain the above stations/concepts.