Novel composite putty for surface repairing of steel structure components

Abstract

The invention relates to novel composite putty for surface repairing of steel structure components. The novel composite putty is constituted by main body putty and a curing agent; the mass ratio of the main body putty to the curing agent is 100:2 during using; the main body putty is prepared from the following components in parts by weight: 50-60 parts of waterborne carbon titanium cage resin, 2-10 parts of deionized water, 1-3 parts of BYK-980, 0.02-0.1 part of ethylparaben, 0.01-0.03 part of polyamide wax, 0.5-1 part of polymethyl methacrylate, 0.1-0.9 part of methyl toluidine, 0.01-0.08 part of methyl ethyl ketoxime, 1-3 parts of talcum powder, 3-6 parts of barium sulfate, 7-9 parts of titanium dioxide, 7-10 parts of metal zinc powder, and 11-16 parts of metallized fibers. By adding themetallized fibers to form a conductive network and by adding the metal zinc powder to ensure the low potential of a composite putty layer compared with a steel structure matrix, cathode protection and corrosion prevention after coating cracking are achieved, a crack is compensated through volume expansion caused by corrosion and oxidation of metal, the anticorrosion property of the steel structure components is improved, and the novel composite putty is particularly suitable for repairing engineering of the steel structure components under high-humidity and multi-sulfur maritime high-corrosion environments.

Description

Technical field [0001] The invention relates to the field of paint coating; in particular, it relates to a new type of composite atomic putty for surface repair of steel structural parts. Background technique [0002] In highly corrosive environments, corrosion pits and surface corrosion failures are prone to occur on the surface of steel structures, seriously affecting safety and service life. When reapplying paint, uneven thickness in the pits can easily lead to cracking of the coating again. Therefore, in actual anti-corrosion treatment, before applying anti-corrosion paint, the surface of the steel structure needs to be filled with putty and carefully polished to form a smooth surface. [0003] Currently commonly used acid-alcohol putty, epoxy putty and putty are mainly used to fill pits. When these materials are thick, they are prone to cracks and have no electrochemical protective properties. Once the corrosive liquid penetrates, the metal at the bottom will oxidize ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used acid alcohol putty, epoxy putty and putty are mainly used to fill up the pits. When these materials are thick, they are easy to form cracks and have no electrochemical protection performance.

Once infiltrated into the corrosive liquid, the metal at the bottom will oxidize and corrode, resulting in rapid corrosion failure of the base metal structure

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