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

A technology for stabilizing treatment agent and weathering steel, applied in the direction of metal material coating process, etc., can solve problems such as being unsuitable for large-scale industrial implementation, and achieve large-scale industrial production, simple construction process, and easy large-scale industrial production. Effect

Inactive Publication Date: 2013-06-26
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvent of this invention is ethanol, is not suitable for large-scale industrialized implementation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The weathering steel surface rust layer stabilization treatment agent consists of 45% alkyd varnish, 4% copper pyrophosphate, 2% barium chromate, 14% Fe 3 o 4 , 20% Fe 2 o 3 , 10% of 200# solvent naphtha and 5% of LS3080.

[0022] When using, weigh alkyd varnish, copper pyrophosphate, barium chromate, Fe 3 o 4 , mineral spirits and dispersant, and mix uniformly to obtain a treatment agent.

[0023] Sample preparation:

[0024] The hot-rolled plate retrieved from the production plant was processed into a sample. After the surface of the sample was degreased, the treatment agent of this embodiment was applied to the sample by brushing or spraying, and dried at room temperature to form a film.

[0025] Weekly immersion corrosion test:

[0026] The samples treated with the bare steel rust layer stabilization treatment agent are placed in the peri-immersion box, referring to the TB / T2375 standard, using 3% NaCl solution, and taking samples at different times in contin...

Embodiment 2

[0029] The weathering steel surface rust layer stabilization treatment agent consists of 25% alkyd varnish, 12% copper pyrophosphate, 10% barium chromate, 1% Fe 3 o 4 , 50% Fe 2 o 3 , 1.5% of 200# solvent oil and 0.5% of BYK-AT204.

[0030] The preparation method, sample preparation, and immersion corrosion test of this embodiment are the same as those of the embodiment.

[0031] After 720 hours of weekly immersion test, the corrosion rate has basically reached stability, but the corrosion rate of bare steel has not yet reached stability after 1486 hours of weekly immersion test. It shows that the bare steel using this treatment agent can shorten the stabilization time of the rust layer by more than 50% through the 3% sodium chloride weekly immersion test.

Embodiment 3

[0033] The weathering steel surface rust layer stabilization treatment agent consists of 30% alkyd varnish, 6% copper pyrophosphate, 5% barium chromate, 12% Fe 3 o 4 , 45% Fe 2 o 3 , 1% of 200# solvent naphtha and 1% of LS3080.

[0034] The preparation method, sample preparation, and immersion corrosion test of this embodiment are the same as those of the embodiment.

[0035] After 720 hours of weekly immersion test, the corrosion rate has basically reached stability, but the corrosion rate of bare steel has not yet reached stability after 1486 hours of weekly immersion test. It shows that the bare steel using this treatment agent can shorten the stabilization time of the rust layer by more than 50% through the 3% sodium chloride weekly immersion test.

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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...

Claims

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Application Information

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IPC IPC(8): C23C22/04
Inventor 刘建容张万灵黄先球石争鸣郎丰军马颖何锐王靓
Owner 武汉钢铁有限公司
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