Corrosion issues with gasoline and diesel tanks, urgent!!!
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This post was last edited by cuicunzhi on 2009-7-6 08:39. Can the anti-corrosion coatings for gasoline tanks and diesel tanks be designed to be the same? Are there any samples of the anti-corrosion instructions for these two types of storage tanks? Thanks, everyone!
It is completely fine to design them with the same anti-corrosion coating; generally, both types are considered finished oil tanks, and the same anti-corrosion measures are applied to them. Good solution: 1. Sandblast to Sa 2.5 grade ； 2 Coatings: epoxy zinc-rich or inorganic zinc-rich, 2 layers, 60-80 microns ； 3 Apply epoxy antistatic primer in 2 coats, 80-150 microns thick ； 4 Coat with epoxy antistatic topcoat or light-colored antistatic topcoat, 2 coats of 80 microns each. The thickness of the coating on the bottom of the tank must be no less than 300 micrometers ； The wall thickness shall not be less than 200 micrometers. This post was last edited by Lilong Coatings on 2009-3-11 20:14.]
Of course. For gasoline tanks and diesel tanks, only the outer walls need to be protected against corrosion; the inner walls do not require such protection
Are there clear specifications in the regulations regarding whether anti-corrosion treatment is required for this inner wall? It seems that some people apply such treatment while others don’t; some don’t apply it to crude oil but do so to refined oil, while others apply it to both. Is this also based on practical construction experience?
Reference can be made to GB50393-2008, 3.0.1: Steel oil storage tanks shall have anti-corrosion measures in place, and anti-corrosion requirements shall be taken into account during design. 3.0.2 When coating protection is used, the design life of the anti-corrosion coating on steel oil storage tanks shall be no less than 7 years inside the tank and no less than 10 years outside the tank; for underground storage tanks, it shall be equivalent to the design life of the tank. 3.0.3 The outer bottom plate of steel oil storage tanks with a capacity greater than 1000 m3 shall be subjected to cathodic protection, and the design life of this cathodic protection system shall be no less than 20 years ； The outer bottom plates of newly constructed oil storage tanks with a capacity of 100,000 m3 or more shall be protected by forced current cathodic protection, and the design life of this cathodic protection system shall be no less than 40 years. It turns out it’s not necessary to do it; generally, it doesn’t make much of a difference.
It is safe to apply internal and external anti-corrosion treatments to finished oil storage tanks; factors such as static electricity, corrosion, and protection must be taken into account. It seems that this practice is used everywhere abroad.
There are established standards and procedures for the corrosion protection of oil tanks. :)