In this test, by applying a specific Voltage (from 10 to 60 V) along the height of the sample, chlorine ions are forced to migrate into the sample. After a specific time (from 6 to 96 hours), the sample is cut in half along the height and the silver nitrate solution is spread on one of its surfaces and the penetration depth is measured (white part). Finally, the chlorine ion migration rate is calculated using the penetration depth and the concrete is classified.