Cladding and corrosion control method for margin plate at bottom of vertical storage tank

Abstract

The invention relates to a cladding and corrosion control method for a margin plate at the bottom of a vertical storage tank. A cladding area covers the part 200mm above the bottom of the vertical storage tank, the part extending from a T-shaped joint of the margin plate at the bottom of the vertical storage tank to the edge of the margin plate, an asphaltic sand protective layer with a width of 100mm, and the part where a concrete base extends outward by 200mm. The cladding area sequentially comprises an anticorrosion paste layer (3), an anticorrosion puddle layer (6), an anticorrosion belt layer (2), polyester fiber cloth (7), an elastic macromolecule anticorrosion layer (9) and a weather-proof surface coating (8) from inside to outside; the polyester fiber cloth (7), the anticorrosion belt layer (2), the anticorrosion puddle layer (6) and the anticorrosion paste layer (3) on the inner layer are all isolated and sealed in an inner wall space formed by the elastic macromolecule anticorrosion layer (9) through the elastic macromolecule anticorrosion layer (9), so that a multi-layer cladding anticorrosion structure with a certain plastic deformation function is formed.

Description

technical field [0001] The invention relates to an anti-corrosion technology, in particular to an anti-corrosion method for coating the bottom edge plate of a vertical storage tank. Background technique [0002] Steel oil storage tanks are essential container facilities for oil storage and transportation in petroleum and petrochemical industries, but they are often corroded by internal and external environmental media during operation. In the corrosion accidents of storage tanks, compared with the tank wall and tank roof, the frequency of corrosion perforation on the bottom plate of the tank is the highest. In the corrosion of the bottom plate of the tank, the corrosion of the edge plate is becoming more and more serious, which has attracted great attention from the production and use units. At present, the bottom edge plates of these storage tanks are often sealed and protected with asphalt sand or cement mortar, but these protection methods will crack after a period of us...

AI Technical Summary

Problems solved by technology

In addition, the bottom plate itself has a large number of dead ends such as welds and free edges.

[0005]2. Environmental factors

The coating anti-corrosion technology requires relatively high construction conditions, and the presence of high humidity, high salt content, and dust will affect the construction quality of the coating, which will cause the service life to be lower than the design life; In direct contact with the seat, once corrosion occurs, it is extremely difficult to meet the real anti-corrosion requirements by general maintenance

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