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Corrosion resistant technique for steel structure

A steel structure and process technology, applied in the direction of metal material coating process, coating, etc., can solve problems such as corrosion, achieve the effects of avoiding cracking, good bonding performance, and improving appearance

Active Publication Date: 2016-03-23
BEIJING BAOFENGYUAN STEEL STRUCTURE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the anti-corrosion coating on the surface of the steel structure is poor and damaged, the steel structure body will also be exposed and rusted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Steel structure anticorrosion process, the process includes:

[0023] Step A: Mechanical or chemical treatment and preheating of the surface, mechanically or chemically treating the surface of the steel structure to remove rust and oil stains on the surface; preheating the surface of the steel structure, the preheating temperature is 150-450°C; Clean and derust the surface of the steel structure, and polish it to St2 level, with a surface roughness of Rz60-80um;

[0024] Step B: The working platform is a CNC laser processing machine; the bottom metallurgical powder is sent into the laser molten pool by coaxial or side-axis powder feeding device, and the cladding is carried out by scanning cladding, and then the cladding middle layer and surface layer are scanned separately ;

[0025] Step C: After the cladding is completed, keep warm at 100-200°C for 30 minutes to form a uniform and dense anti-corrosion, anti-sulfur and wear-resistant laser cladding coating with a thic...

Embodiment 2

[0037] Steel structure anticorrosion process, the process includes:

[0038] Step A: Mechanical or chemical treatment and preheating of the surface, mechanically or chemically treating the surface of the steel structure to remove rust and oil stains on the surface; preheating the surface of the steel structure, the preheating temperature is 150-450°C; Clean and derust the surface of the steel structure, and polish it to St2 level, with a surface roughness of Rz60-80um;

[0039] Step B: The working platform is a CNC laser processing machine; the bottom metallurgical powder is sent into the laser molten pool by coaxial or side-axis powder feeding device, and the cladding is carried out by scanning cladding, and then the cladding middle layer and surface layer are scanned separately ;

[0040] Step C: After cladding, keep warm at 100-200°C for 30 minutes to form a uniform and dense anti-corrosion, anti-sulfur and wear-resistant laser cladding coating with a thickness of 650 μm. ...

Embodiment 3

[0052] Steel structure anticorrosion process, the process includes:

[0053] Step A: Mechanical or chemical treatment and preheating of the surface, mechanically or chemically treating the surface of the steel structure to remove rust and oil stains on the surface; preheating the surface of the steel structure, the preheating temperature is 150-450°C; Clean and derust the surface of the steel structure, and polish it to St2 level, with a surface roughness of Rz60-80um;

[0054] Step B: The working platform is a CNC laser processing machine; the bottom metallurgical powder is sent into the laser molten pool by coaxial or side-axis powder feeding device, and the cladding is carried out by scanning cladding, and then the cladding middle layer and surface layer are scanned separately ;

[0055] Step C: After cladding, keep warm at 100-200°C for 30 minutes to form a uniform and dense anti-corrosion, anti-sulfur and wear-resistant laser cladding coating with a thickness of 0.57 mm....

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Abstract

The invention relates to surface corrosion resistance of steel structures, in particular to a corrosion resistant technique for a steel structure. The corrosion resistant technique for the steel structure comprises the steps that mechanical or chemical treatment and preheating treatment are conducted on the surface of the steel structure; alloy powder is automatically fed into a laser melting pool by means of a coaxial or paraxial powder feeding device; fusion covering is conducted in the mode that scanning for fusion covering is conducted on three layers respectively; and heat preservation is conducted after fusion covering, so that a uniform, compact, corrosion-resistant, sulfur-resistant and abrasion resistant laser fusion covering coating with the thickness ranging from 500 micrometers to 1.3 millimeters is obtained. According to the corrosion resistant technique for the steel structure, the multi-layer fusion covering technique is adopted, the alloy power on the bottom layer is well bonded to a base body, and the phenomenon of cracking of a laser reinforced layer and a base layer is avoided; a middle layer is a transition layer, and a surface layer has better abrasion resistance and corrosion resistance; the bonding force of the corrosion-resistant coating and the base body of the steel structure is high and averagely reaches 15.0-20 MPa, the surface hardness reaches over HV410 and is higher than the national standard, the appearance of the structure is improved, and the service life of the structure can reach over 80 years.

Description

technical field [0001] The invention relates to steel structure surface anticorrosion, in particular to a steel structure anticorrosion process. Background technique [0002] At present, the steel structure is exposed to the wild environment, and its surface is easily corroded by chemical and electrochemical interactions with the surrounding environment. Therefore, it is necessary to coat a layer of anti-corrosion layer on its surface to protect the steel structure body from being corroded. However, when the anti-corrosion coating on the surface of the steel structure is poor and damaged, the steel structure body will also be exposed and rusted. Steel structure buildings are generally large permanent buildings with long service life and difficult maintenance. Effective long-term anticorrosion must be carried out to ensure the service life of the building. Contents of the invention [0003] In order to solve the above problems, the object of the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C21/00C22C19/07C22C38/58C22C38/56C22C38/44
CPCC22C19/07C22C21/00C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/56C22C38/58C23C24/106
Inventor 多洪升冯建平
Owner BEIJING BAOFENGYUAN STEEL STRUCTURE ENG