Corrosion Causes and Protection Measures of Heat Preservation Crude Oil Storage Tank Outer Walls

In order to study the corrosion process of heat preservation crude oil storage tank outer walls, through the field maintenance of several storage tanks in Zhoushan oil depot, combining the electrochemical corrosion mechanism the status and reasons were corrosion comprehensively analyzed. The results showed that the marine-atmosphere environment in Zhoushan had an obvious effect on tank outer wall corrosion, the most serious corrosion occured on 6-8 circles of the outer walls. The corrosion was more serious on the windward side and slight on the leeward in general. The arrangement and selection of insulation support rings, protection boards and thermal insulation materials had an important effect on tank outer wall corrosion.