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Pretreatment solution and method for stabilization of weathering steel surface rust layer

A technology of pretreatment liquid and weathering steel, applied in the direction of metal material coating process, etc.

Active Publication Date: 2018-10-16
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned analysis, the present invention aims to provide a pretreatment solution and a pretreatment method for stabilizing the rust layer on the surface of weathering steel, in order to solve the problem that the rust layer stabilization technology in the prior art is not aimed at industrial atmospheric corrosion and marine Atmospheric corrosion These two corrosive environments are designed separately and the technical problems of anti-corrosion with unused pretreatment liquid

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  • Pretreatment solution and method for stabilization of weathering steel surface rust layer

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Effect test

Embodiment 1

[0045] A kind of weathering steel surface pretreatment liquid in the industrial atmosphere provided by the invention, each chemical component and its mass fraction in the pretreatment liquid are: 1%Cr(SO 4 ) 3 , 0.6% FeSO 4 , 0.3% CuSO 4 , 0.6% NaHSO 3 , 0.5% NiSO 4 , with a margin of H 2 O.

[0046] Specific operation process:

[0047] After the surface of the weathering steel substrate is removed by shot blasting or pickling, pour the prepared weathering steel surface pretreatment solution into the sprayer, and spray evenly on the steel surface for 5 seconds until the weathering steel surface turns brown. After spraying once, let the surface of the weathering steel dry naturally; after the surface of the weathering steel is dry, spray water once every 5 seconds; After the second water spray is dry, continue to spray water for the third time for 5 seconds; Maintain the water spray-dry process to ensure that a uniform, dense rust layer is formed on the weathering steel...

Embodiment 2

[0050] A kind of weathering steel surface pretreatment liquid in the industrial atmosphere provided by the invention, each chemical component and its mass fraction in the pretreatment liquid are: 2%Cr(SO 4 ) 3 , 0.3% FeSO 4 , 0.6% CuSO 4 , 1.2% NaHSO 3 , 1.0% NiSO 4 , with a margin of H 2 O.

[0051] Specific operation process:

[0052] After the surface of the weathering steel substrate is removed by shot blasting or pickling, the prepared weathering steel surface pretreatment solution is poured into the sprayer, and sprayed evenly on the steel surface for 6 seconds until the weathering steel surface turns brown. After spraying once, let the surface of the weathering steel dry naturally; after the surface of the weathering steel is dry, spray water once every 6 seconds; After the second water spray is dry, continue to spray water for the third time for 6 seconds; Maintain the water spray-dry process to ensure that a uniform, dense rust layer is formed on the weatherin...

Embodiment 3

[0055] A kind of weathering steel surface pretreatment liquid in the industrial atmosphere provided by the invention, each chemical component and its mass fraction in the pretreatment liquid are: 0.5%Cr(SO 4 ) 3 , 1.2% FeSO 4 , 0.15% CuSO 4 , 0.32% NaHSO3 , 0.92% NiSO 4 , with a margin of H 2 O.

[0056] Specific operation process:

[0057] After the surface of the weathering steel substrate is removed by shot blasting or pickling, pour the prepared weathering steel surface pretreatment liquid into the sprayer, and spray evenly on the steel surface for 7 seconds until the weathering steel surface turns brown. After spraying once, let the surface of the weathering steel dry naturally; after the surface of the weathering steel is dry, spray water once every 7 seconds; After the second water spray is dry, continue to spray water for the third time for 7 seconds; repeat the above process of spraying treatment liquid-drying-water spraying-drying-water spraying-drying-water sp...

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Abstract

The invention relates to a pretreatment solution and method for stabilization of a weathering steel surface rust layer in industrial atmospheric environment, and belongs to the technical field of metal corrosion and protection. The technical problems that different pretreatment solutions for corrosion prevention are not designed according to industrial atmospheric corrosion environment and marineatmospheric corrosion environment through the rust layer stabilization technology in the prior art separately are solved. The pretreatment solution for stabilization of the weathering steel surface rust layer comprises, by mass, 0.5%-2% of Cr(SO4)3, 0.3%-1.2% of FeSO4, 0.1%-0.6% of CuSO4, 0.3%-1.2% of NaHSO3, 0.2%-1.0% of NiSO4 and the balance H2O. According to the pretreatment solution and methodprovided by the invention, the stabilization of the weathering steel surface rust layer in the industrial atmospheric environment is achieved, and the severe corrosion problem of weathering steel isavoided; and the non-corrosive storage of the weathering steel in China is ensured.

Description

technical field [0001] The invention relates to the technical field of metal corrosion and protection, in particular to a pretreatment solution and a pretreatment method for stabilizing the rust layer on the surface of weathering steel under an industrial atmospheric environment. Background technique [0002] Although weathering steel can rely on the protective effect of the dense rust layer formed on its surface, it can show good atmospheric corrosion resistance. However, it takes a long time to stabilize the rust layer in the natural environment, which greatly affects the use effect of weathering steel. In addition, weathering steel is often prone to severe early corrosion or rust liquid sagging or scattering during service. Considering the problems of environmental protection and appearance, this unfavorable phenomenon seriously restricts the extensive use of weathering steel. In order to solve this problem, various rust stabilization technologies have been researched a...

Claims

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Application Information

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IPC IPC(8): C23C22/05
CPCC23C22/05
Inventor 陈小平王向东黄涛刘清友贾书君汪兵童帅
Owner CENT IRON & STEEL RES INST
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