Steel tank plastic-pasting internal lining antisepsis method

Abstract

The invention relates to a method for preventing corrosion of plastic stuck inside lining of a steel-made tank body, which comprises following steps: removing an oxide layer and an oil stain layer on the inner surface of the steel-made tank body, mixing phosphating solution to phosphatize the surface of the steel-made tank body, using clear water to clean the steel-made tank body after phosphatizing, drying, mixing adhesive, evenly coating the adhesive on the inner surface of the steel-made tank body, clinging a plastic plate whose thickness is 0.5-30mm on the inner surface of the steel-made tank body, leaving joints of 0.1-10cm between different plastic plates, using a stop plate to seal each interface of the steel-made tank body, injecting compressed air into the steel-made tank body, achieving the curing time of the adhesive under the condition of constant pressure 0.03-0.1MPa, curing the adhesive, and then using welding rods to fill the joints between each plastic plate through welding. The method of the invention has the advantages that firstly, an adhesive layer is provided between the steel-made tank body and a plastic anti-corrosion layer, which enables the steel-made tank body and the plastic anti-corrosion layer to be compactly connected, corrosion medium can not be rapidly dispersed by any possibility that leakage happens, secondly, the plastic layer has a comparatively big regulating range, which can satisfy the demands of different users, thirdly, the joints between each plastic plate can be adapted to the changes of the environmental temperature after being filled with the welding rods, and the reliability of products is increased.

Description

Technical field: [0001] The invention relates to an anti-corrosion method for a steel tank body with a plastic lining, which is mainly used for the anti-corrosion treatment of the steel tank body. Background technique: [0002] Steel tanks generally adopt plastic-lined technology to meet anti-corrosion requirements. The plastic lining method in the prior art is mainly steel mesh plastic composite rotational molding lining method (such as the publication number is CN1686766, the patent application that name is called " the tank of steel mesh plastic composite structure and its rotational molding process ") and spraying. The product cost of plastic and rotomolding lining technology is relatively high, and the lining plastic layer is separated from the surface of the steel tank body. Once leakage occurs, the corrosive solution will penetrate into the entire tank body, causing the tank body to be corroded quickly. Plastic spraying technology is mainly plastic powder flame spray...

AI Technical Summary

Problems solved by technology

Plastic spraying technology is mainly plastic powder flame spraying, the coating is thin, but the plastic itself is not strong, as the anti-corrosion layer of the tank, especially the mobile tank, it is easy to break, and the damage is similar to that of rotational molding