Oil fuel based protective liquids application in tanks of hot water- supply

摘要

Protective liquids are used in energetic industry for anticorrosion protection of metal surface of hot water-supply tanks. Water reserve stored in that 100-20 000 cubic metres volume tanks. It is necessary for levelling of hot water streams in open systems of centralized communal heat supply and for uninterruptible heat-transfer feeding to consumers. Protective liquids are viscous solutions of high molecular polymers with mineral oils and anticorrosion additives. Generally high molecular polyisobutylene (molecular weight 200 000) are used as a thickening agent and industrial oil I/I-20A or M-12A are used as a base. Protective liquids are used in tanks for 4 years at the temperature conditions 80 - 90 °C. Due to high adhesion ability protective liquid cover inside tank with thick layer, which prevent contact between metal surface and water. The application of protective liquids results in corrosion speed carbon steel decrease until 180 and 1200 time in steam-gas phase and on interphase accordingly. Moreover, high quality of drinkable and circulating water is achieved. Protective liquids provide longer life time of metal surface then lacquering or zinc-silicate films. In addition, It is excluded operations, connected with prime preparation of equipment surface for covering that liquids. Now more then 50 % of Russian energetic concerns use protective liquids as a means of anticorrosion protective. Also their widely spreading is connected with their ability to prevent of hot water evaporation from tanks.