Treating agent for stabilizing rust layer on surface of weather resistant steel

Abstract

The invention provides a treating agent for stabilizing a rust layer on the surface of weather resistant steel. The treating agent comprises the following components in percentage by weight: 18.9-26.6% of a transforming agent, 1.3-3.9% of a complexing agent, 0.2-2.2% of a chloridion inhibiting agent, 3.9-7.9% of an auxiliary agent, 0.7-1.4% of an accelerant, and the balance being solvent water, wherein the transforming agent is phosphoric acid; the complexing agent is tannin and lactic acid; the chloridion inhibiting agent is sodium molybdate; the auxiliary agent is one kind or two kinds of compounds containing zinc, namely sodium benzoate and zinc oxide, and zinc dihydrogen phosphate; and the accelerant is sodium nitrate. The treating agent disclosed by the invention can be prepared by a general paint preparation technology, is simple in formula and treating technology, and low in preparation cost and construction cost; the treating agent can be applied by a spraying manner or brushing manner, and can be quickly dried and formed into a film under normal temperature; the treating agent is suitable for metallurgical enterprises and being implemented on construction sites; a treated layer can improve the corrosion resistance of a weather resistant steel substrate, and the phenomenon that the rust liquid on the surface of the weather resistant steel runs and sags is reduced.

Description

Technical field [0001] The invention belongs to the technical field of corrosion and protection, and particularly relates to an environment-friendly treatment agent capable of improving the rust liquid sagging phenomenon on the surface of weathering steel and improving the corrosion resistance of weathering steel. Background technique [0002] Weathering steel has good resistance to atmospheric corrosion. It can form a dense and stable rust layer on its surface during use. This rust layer has good corrosion resistance and can effectively prevent the entry of corrosive media. The bare use of weathering steel eliminates the need for painting and regular anti-corrosion treatment, so it can produce good economic and environmental benefits. However, there are some problems when weathering steel is exposed to use. First of all, it takes 4 to 10 years for the formation of a stabilized rust layer on the surface of weathering steel. Before that, the exposed weathering steel produced red ...

AI Technical Summary

Problems solved by technology

Obviously, this treatment technology is cumbersome and requires high temperature curing, so it is not suitable for practical application in the field.

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