Will using 50 millimeters asphalt sand for the foundation of atmospheric-pressure stainless steel storage tanks cause corrosion to the tank bottom?
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For ordinary 304 stainless steel storage tanks, the design base for the tank bottom is 50 asphalt sand. Is this okay? Will the bituminous sand corrode the bottom of the tank?
Asphalt serves a corrosion-resistant function. Using asphalt sand as the surface material in contact with the steel plates in the tank foundation is a common practice; you can use it with confidence
Does the base plate need to be treated for corrosion protection? Will chloride ions in asphalt cause corrosion to the base plate?
Steel plates need to be properly protected against corrosion; generally, after sandblasting to remove rust, three coats of anti-corrosion paint are applied. The chloride content in asphalt is not high, so the anti-corrosion treatment applied to the steel plates will not cause corrosion to the bottom plate.