BS ISO 19097-2:2018 pdf download – Accelerated life test method of mixed metal oxide anodes for cathodic protection Part 2: Application in soils and natural waters 4.3.6 A thermometer shall be inserted in the cell. If more than one cell is used, each cell shall have a thermometer installed. The exact type of thermometer used shall be in accordance with the general safety practices of the laboratory and shall not have any materials exposed to the electrolyte that could corrode and contaminate the solution. Alternately, a thermocouple may be used. The temperature range of the thermometer shall be 20 °C to 100 °C. Stainless steel or other metallic thermocouples shall not be exposed to the electrolyte to avoid corrosion and contamination. 4.3.7 The power supply shall be a constant current control, typical for laboratory use. The required amperage shall be determined from the sample size and the current density for the particular accelerated test point. For example, 5 A is appropriate for a 500 mm 2 sample being run at 10 kA/m 2 . One power supply can also energize several electrolytic cells connected in series at the same time. The required voltage depends on the number of test stations in series that may be used. Typically, 8 V per cell times the number of cells in series is sufficient. 4.3.8 Use data acquisition device or voltmeter to monitor the voltage of each cell continuously until the failure of the anode. The voltage measuring device shall have a high input impedance of 10 MΩ or greater, and be capable of measuring cell voltage accurate to ±1 %. 4.3.9 Temperature control equipment may be necessary to maintain the electrolyte within the required range depending on laboratory conditions. Essentially, a fluid may be used to input or extract heat from the electrolyte indirectly. Examples of such equipment are jacketed beakers and water bath for beakers. NOTE A schematic diagram of test apparatus is shown in Annex A. 4.4 Test specimens 4.4.1 The number and type of test specimens shall be selected according to the specifications for the anode material or product being tested. To ensure the accuracy of the data, usually three, but at least two, duplicate specimens of each anode shall be tested in the separate cells under identical operating conditions. 4.4.2 The test specimens shall be carefully cleaned prior to testing so as to remove those traces (dirt, oil or...
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