Corrosion Protection of Oil Storage Tank Double Bottoms

摘要

The proper combination of different corrosion protection methods leads to a more efficient preservation of oil storage tank double bottoms. The protection methods currently in use include cathodic protection systems (CPS) or CPS in combination with soluble corrosion inhibitors (SCI). Considering the unpredictable corrosion environment and application conditions, in most cases, these methods are not efficient enough and do not significantly reduce the frequency of tank double bottom replacement. The new combined methods described in this paper, however, do increase the efficiency of protection. Their use leads to an increase in storage tank service life. The relationships between CPS current densities, SCI and volatile corrosion inhibitors (VCI) concentrations, as well as system efficiencies are discussed. corrosion; inhibitor; cathodic protection; storage tanks; double bottom; efficiency; service life