Résumé : Buildings and structures reliability is a key question in human life and activities. Corrosion processes affect reliability of all water supply and distribution systems in buildings and structures.This research provides results of the tests for corrosion rate and for the time of steel water-pipes inhibition of corrosion in Samara. A gravimetric method was used to determine corrosion rate. The test subjects were surface (the Volga river) and underground (water treatment facilities of 113 km, Kuibyshev district) water supply sources. These tests proved that river water was highly aggressive in respect to other materials. Here the corrosion rate reached 0.1665 g/(m 2 /h) during in the 5 th month of exposure, and the specimens were damaged by pitting corrosion (within 1 month) and by cankers (within 5 months). The value of the corrosion rate in underground source water was within the range of 0.01-0.06 g/(m 2 /h), and the specimens were not subjected to any significant corrosion damage. The time of experience was not enough for complete inhibition of corrosion. The authors studied a sample with 50-year operational lifetime and proved that all corrosion processes affecting this sample had stopped, this sample material integrity had been pre-served which meant that steel pipes complete inhibition of corrosion was possible. The experiments also showed that the inner surface of the pipe was later filled with corrosion deposits. The thickness of corrosion deposits in the tray zone reached up to 7 mm.