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Steel structure supersonic electric arc aluminium spraying anticorrosion coat technology

A supersonic arc and arc spraying technology, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problems of aluminum particle deposition rate of only 40-50%, waste of aluminum metal, low bonding strength, etc. Achieve the effects of saving zinc metal resources, avoiding power failure losses, and reducing pretreatment costs

Inactive Publication Date: 2007-01-31
王向红
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Problems solved by technology

The bonding strength of traditional arc-sprayed aluminum anti-corrosion coatings is low, generally 10-11MPa; there will be pores and dark pores on the surface, and the surface porosity is >5%; the appearance is rough, and the average particle diameter of coated aluminum is 140μm; during the spraying process The waste of aluminum metal is serious, and the deposition rate of aluminum particles is only 40-50%.

Method used

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  • Steel structure supersonic electric arc aluminium spraying anticorrosion coat technology

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Embodiment Construction

[0013] The surface derusting of the steel structure parts of the power communication tower is carried out in two steps. First, the components are pickled and derusted to expose the iron inside the components. After pickling, the surface of the component is smooth, and then sandblasting or shot blasting is carried out to make the surface roughness reach R Z =25~80, to ensure the excellent bonding strength of aluminum coating quality, the comprehensive rust removal method combined with pickling and sand blasting or shot blasting can increase the rust removal efficiency of traditional simple sand blasting and shot blasting by more than 6 times, making The cost of rust removal is reduced by 70%, and at the same time, it fully meets the requirements of electric arc spraying aluminum and the surface of the steel structure reaches S a 2.5 rust removal standard, that is, all surface rust and oil stains are 100% removed, but differences in surface color are allowed. Two aluminum wires...

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Abstract

This invention relates to a type of steel structure, supersonic speed, electric arc, aluminium painting, and anticorrosion insulation technology. First removing rust and coarsening of steel structure surface; then take the two aluminium silk of electric arc spraying coater as coating stuff, short circuit electric arc as heat source, use high pressure air to make aluminium liquid droplet. Atomize. The lance muzzle of electric arc spraying coater has convergent-divergent blast cap ,to shape the twice atomization and form supersonic speed particle jet which spray on the steel matrix to form the aluminium metal smear layer, and spray blocking smear layer on this layer to form the heavy anticorrosion insulation. Aluminium particle has high binding strength; low surface blowhole rate, smear layer well-distributed; high sedimentation rate of AL particle. This invention especially suit for iron tower's steel structure in electric communication domain.

Description

technical field [0001] The invention relates to a steel structure supersonic arc-sprayed aluminum anti-corrosion coating process and its application in the field of steel structure anti-corrosion of electric communication iron towers. Background technique [0002] Hot-dip galvanizing is an anti-corrosion technology commonly used in steel structures of electric power communication towers in China. Although this technology has a history of 170 years, it still monopolizes the market as a leading technology. Practice has proved that there are many unsatisfactory major technical defects in hot-dip galvanizing, mainly in the short effective protection life, the large amount of manual maintenance work in the later stage, and the hidden danger of high-altitude operation, especially in the power hub due to regular manual maintenance. , resulting in significant adverse economic and social benefits. As a traditional backward anti-corrosion technology, hot-dip galvanizing has seriously...

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Application Information

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IPC IPC(8): C23C4/00C23C4/08C23C4/02C23C4/131
Inventor 王向红
Owner 王向红
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