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Steel structure surface corrosion prevention process

A steel structure and process technology, applied in metal material coating process, melt spraying, coating and other directions, can solve the problems of high cost, steel structure anti-corrosion ability can not meet the needs of use, impetuous anti-corrosion process operation, etc., to improve the use of Longevity, improved structural strength and wear resistance, low cost effect

Inactive Publication Date: 2018-07-06
湖北鸿地重工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a steel structure surface anticorrosion process to solve the problems of impetuous operation and high cost of the existing anticorrosion process proposed in the above background technology, and the anticorrosion ability of the steel structure after anticorrosion treatment still cannot meet the needs of use question

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  • Steel structure surface corrosion prevention process

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Effect test

Embodiment 1

[0020] The steel structure surface anticorrosion process includes the following steps:

[0021] S1: Pretreatment: Clean and derust the surface of the steel structure, and then perform sandblasting roughening with dry, compressed and oil-free air, with a sandblasting pressure of 0.55MPa, a spraying angle of 15 degrees, and a sandblasting distance of 120mm , the surface roughness of the steel structure is Ra15um;

[0022] S2: preheating: preheating the pretreated steel structure at 250 degrees Celsius for 30 minutes;

[0023] S3: Spraying: Using multi-component alloy powder, supersonic flame spraying is carried out on the surface of the steel structure through supersonic flame spraying equipment. The spraying process parameters are: gas pressure 0.4MPa, oxygen pressure 0.65MPa, nitrogen pressure 0.35MPa, gas pressure Flow rate is 45L / min, oxygen flow rate is 460L / min, nitrogen flow rate is 135L / min; powder feeding speed is 125g / min, flame speed is 230m / s, flame temperature is 2...

Embodiment 2

[0026] The steel structure surface anticorrosion process includes the following steps:

[0027] S1: Pretreatment: Clean and derust the surface of the steel structure, and then use dry, compressed and oil-free air to perform sandblasting and roughening. The sandblasting pressure is 0.6MPa, the spraying angle is 20 degrees, and the sandblasting distance is 140mm. , the surface roughness of the steel structure is Ra20um;

[0028] S2: preheating: preheating the pretreated steel structure at 260 degrees Celsius for 35 minutes;

[0029] S3: Spraying: Using multi-component alloy powder, supersonic flame spraying is carried out on the surface of the steel structure through supersonic flame spraying equipment. The spraying process parameters are: gas pressure 0.42MPa, oxygen pressure 0.7MPa, nitrogen pressure 0.4MPa, gas pressure The flow rate is 50L / min, the oxygen flow rate is 470L / min, the nitrogen flow rate is 140L / min; the powder feeding speed is 130g / min, the flame speed is 240m...

Embodiment 3

[0032] The steel structure surface anticorrosion process includes the following steps:

[0033] S1: Pretreatment: Clean and derust the surface of the steel structure, and then conduct sandblasting roughening with dry, compressed and oil-free air, with a sandblasting pressure of 0.5MPa, a spraying angle of 10 degrees, and a sandblasting distance of 100mm , the surface roughness of the steel structure is Ra10um;

[0034] S2: preheating: preheating the pretreated steel structure at 240 degrees Celsius for 25 minutes;

[0035] S3: Spraying: Using multi-component alloy powder, supersonic flame spraying is carried out on the surface of the steel structure through supersonic flame spraying equipment. The spraying process parameters are: gas pressure 0.38MPa, oxygen pressure 0.6MPa, nitrogen pressure 0.3MPa, gas pressure The flow rate is 40L / min, the oxygen flow rate is 450L / min, the nitrogen flow rate is 130L / min; the powder feeding speed is 120g / min, the flame speed is 220m / s, the ...

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Abstract

The invention belongs to the technical field of metal surface treatment and particularly discloses a steel structure surface corrosion prevention process. The steel structure surface corrosion prevention process comprises the following steps: S1, pretreating by washing and removing rust on the surfaces of steel structures, blasting sand and roughening through dried and compressed oil-free air; S2,preheating the pretreated steel structures for 25-35 minutes under the condition at 240-260 DEG C; S3, spraying by carrying out hypersonic flame spraying the surfaces of the steel structures througha hypersonic flame spraying device; and S4, cooling. Through the steel structure surface corrosion prevention process, the corrosion resistance of the steel structures in the corrosion environment with acid rain and neutral salt mist can be effectively improved; the mass loss of the steel structures caused by corrosion can be avoided; the structure strength and the corrosion resistance of the steel structures can be obviously improved; the service life of the steel structures can be prolonged; the corrosion prevention process is simple and is convenient to operate and low in cost.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment technology, in particular to a steel structure surface anticorrosion process. Background technique [0002] Light steel structure is a young and very vigorous steel structure system, which has been widely used in general industrial and agricultural, commercial, and service buildings, such as office buildings, villas, warehouses, stadiums, entertainment, tourist buildings, and low and multi-storey buildings. Residential construction and other fields. As the main form of modern architecture, steel structure is widely used because of its light weight, high strength, good seismic performance, short construction period, high degree of industrialization of construction, high space utilization rate, and investment saving. Metal corrosion will significantly reduce the mechanical properties of metal materials such as strength, plasticity, and toughness, destroy the geometry of metal compon...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06
CPCC23C4/129C23C4/06
Inventor 马洪锋
Owner 湖北鸿地重工科技有限公司
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