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Stabilizer for promoting formation of weather-resistant steel rust layer and preparation method of weather-resistant steel rust layer

A stabilizer and weathering steel technology, applied in the direction of metal material coating process, etc., can solve the problems of high cost and uneven formation of rust layer, and achieve the effects of easy operation, uniform corrosion and improved stability

Inactive Publication Date: 2019-08-06
北京创氪材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing methods for stabilizing the rust layer can reduce the pollution of rust liquid, accelerate the stabilization of the rust layer, and improve the appearance of the steel structure. around year

Method used

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  • Stabilizer for promoting formation of weather-resistant steel rust layer and preparation method of weather-resistant steel rust layer
  • Stabilizer for promoting formation of weather-resistant steel rust layer and preparation method of weather-resistant steel rust layer
  • Stabilizer for promoting formation of weather-resistant steel rust layer and preparation method of weather-resistant steel rust layer

Examples

Experimental program
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Effect test

preparation example Construction

[0036] The embodiment also provides a method for preparing a weathering steel rust layer. The method includes the following steps:

[0037] Step 1. Remove the oxide scale on the surface of the steel substrate: the surface of the steel substrate is removed by shot blasting or sandblasting;

[0038] Step 2. Prepare the aforementioned stabilizer: combine nano α-FeOOH, nano γ-FeOOH, nano Fe 3 O 4 , CuSO 4 And Cr 2 (SO 4 ) 3 Uniformly dispersed in an aqueous acrylic acid aqueous solution to obtain the stabilizer;

[0039] Step 3. Promote the formation of a stable rust layer on the weathering steel: apply the prepared stabilizer on the surface of the weathering steel, and obtain a stabilizer forming layer after drying; in the subsequent service process of the weathering steel, water and oxygen in the air permeate Forming a layer through the stabilizer and electrochemically corroding with weathering steel to form a stable rust layer;

[0040] After the uniform rust layer is formed, the stabi...

Embodiment 1

[0045] The verification of the stabilizer that promotes the formation of the weathering steel rust layer based on stabilizing the color of the rust layer in this embodiment in the atmospheric exposure experiment includes the following steps:

[0046] S1. Cut the weathering steel into 60mm×40mm. After acetone degreasing, the surface is sandblasted and cleaned with absolute ethanol and blown dry.

[0047] S2. Formulate stabilizers to promote the formation of weathering steel rust layer: combine nano-α-FeOOH, nano-γ

[0048] -FeOOH, nano Fe 3 O 4 , CuSO 4 And Cr 2 (SO 4 ) 3 Disperse uniformly in an aqueous acrylic acid solution to obtain the stabilizer; the weight percentage of the stabilizer is: 3% nano α-FeOOH, 0.5% nano γ-FeOOH, 2% nano Fe 3 O 4 , 2%CuSO 4 And 0.5% Cr 2 (SO 4 ) 3 , The balance is aqueous acrylic acid aqueous solution. Spray the prepared stabilizer on the surface of the weathering steel sample (film thickness 200μm), and dry it in the air to obtain the stabilizer form...

Embodiment 2

[0054] The steps and effects of the stabilizer that promotes the formation of the weathering steel rust layer based on the color of the stabilized rust layer in this embodiment are verified in the atmospheric exposure experiment. The steps and effects are basically the same as those in Example 1, except that:

[0055] The weight percentage of the stabilizer is:

[0056] 1% nano α-FeOOH, 10% nano γ-FeOOH, 10% nano Fe 3 O 4 , 3%CuSO 4 And 3% Cr 2 (SO 4 ) 3 , The balance is aqueous acrylic acid aqueous solution.

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Abstract

The invention belongs to the technical field of weather-resistant steel surface pretreatment, relates to corrosion of weathering steel materials in an atmospheric environment, in particular to a stabilizer for promoting the formation of a weather-resistant steel rust layer and a preparation method of the weather-resistant steel rust layer. The stabilizer comprises the following components of, nanoalpha-FeOOH, nano gamma-FeOOH, nano Fe3O4, CuSO4, Cr2(SO4)3, water-based acrylic acid and water; the nano alpha-FeOOH, the nano gamma-FeOOH, the nano Fe3O4, the CuSO4 and the Cr2(SO4)3 are uniformlydispersed in an aqueous acrylic acid aqueous solution; and the nano alpha-FeOOH, the nano gamma-FeOOH and the nano Fe3O4 can induce rust layer nucleation, meanwhile, the surface of the weather-resistant steel can be uniformly corroded in the service process through the characteristics of the water-permeable and oxygen-permeable stabilizer coating, and meanwhile, uniform corrosion causes uniform shedding of the rust layer stabilizer, so that the color of the weather-resistant steel structure is more uniform.

Description

Technical field [0001] The invention belongs to the technical field of weathering steel surface pretreatment, relates to the corrosion of weathering steel materials in an atmospheric environment, and particularly relates to a stabilizer that promotes the formation of a weathering steel rust layer and a preparation method of the weathering steel rust layer. Background technique [0002] Although weathering steel greatly reduces the atmospheric corrosion rate by virtue of its protective rust layer on the surface, in its natural state, the formation of its protective rust layer often takes several years. Before the protective rust layer is formed, the appearance of the steel structure is very poor. , The rust liquid produced will also pollute the environment, and it is difficult to form a protective rust layer in coastal or high-temperature and high-humidity areas. [0003] Japanese scholars have been developing and researching weathering steel rust layer stabilization technology sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/50
CPCC23C22/50
Inventor 张旭苏宝瀛宿仲刚
Owner 北京创氪材料科技有限公司
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