Treating agent for stabilizing rust layer on surface of weathering-resistant steel and method for preparing same

Abstract

The invention discloses a method for preparing a treating agent for stabilizing the rust layer on the surface of weathering-resistant steel. The treating agent comprises 25-45% by weight of alkyd varnish, 4-12% by weight of copper pyrophosphate, 2-10% by weight of barium chromate, 1-14% by weight of Fe3O4, 20-50% by weight of Fe2O3, 1-10% by weight of solvent oil and 0.5-5% by weight of dispersing agent. The treating agent is simple in construction process, and the test of soaking the treating agent in 3% sodium chloride shows that the rust-layer stabilization time can be shortened by more that 50%. The whole method is safe to operate, is simple in process and low in cost and is easy to realize large-scale industrial production, and a sample has good performance.

Description

technical field

[0001] The invention belongs to the technical field of corrosion and protection, in particular to a method for preparing a rust layer stabilizing treatment agent on the surface of weathering steel. Background technique

[0002] In the atmospheric natural environment, weathering steel has good atmospheric corrosion resistance compared with ordinary carbon steel. The main reason is that after long-term atmospheric exposure, a stable and dense protective rust layer is formed on its surface. The best way to use weathering steel should be bare use, but it takes a long time for weathering steel to complete the stabilization of the rust layer in the natural environment. Before the formation of a stabilized rust layer, early rust liquid sagging and flying pollution often occur The phenomenon of the surrounding environment makes it difficult for users to accept the use in the suburbs and urban areas of the city. Especially in the presence of Cl - In the oceanic atmo...