Construction process for anticorrosion composite coating of steel structure
A composite coating and construction technology technology, applied in metal material coating technology, coating, melting spray plating and other directions, can solve problems such as high price, and achieve the effect of improving appearance and strong bonding force
Inactive Publication Date: 2016-01-20
丁春燕
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Problems solved by technology
The domestic production line has been introduced since 1995. The material formula used is a patented technology, and the raw materials are imported and expensive
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] The specific implementation steps of the construction technology of the steel structure anticorrosion composite coating of the present invention are as follows:
[0014] Step 1: Preparation Phase
[0015] Including the investigation of the construction environment and project scale, etc., as well as the preparation of construction equipment.
[0016] The second step: surface purification treatment
[0017] First check the appearance of the surface of the steel structure, and polish and clean the surface with welding bumps, spatters, pinholes, flashes, burrs, welding slag, etc., and process the sharp corners into rounded corners with a radius of more than 2mm; Remove grease, grease, soluble salt, rust, scale, etc. and other dirt on the surface of the substrate with solvents or solvents. The quality of surface treatment is dry, free of dust, grease, dirt, rust and other pollution including soluble salts, meeting the requirements of GB11373-89.
[0018] Step 3: Sandblas...
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Abstract
The invention provides a construction process for an anticorrosion composite coating of a steel structure. The construction process comprises the steps of surface purification treatment, derusting by sandblast, electric arc spraying of a zinc-aluminum composite coating and sealing treatment. In the step of the electric arc spraying of the zinc-aluminum composite coating, an electric arc spraying gun is adopted, an electric arc serves as the heat source, linear zinc wires with the purity being greater than or equal to 99.5% are heated to be in a molten state at first, the molten zinc is blown into mist through compressed air at the same time, and restrained grain flows are formed and are evenly sprayed on the surface of a substrate to form a zinc coating; and then linear aluminum wires with the purity being greater than or equal to 99.5% are heated to be in a molten state, the molten aluminum is blown into mist through compressed air at the same time, restrained grain flows are formed and are evenly sprayed on the surface of the zinc coating to form an aluminum coating, and the zinc coating and the aluminum coating form the zinc-aluminum composite coating. According to the construction process for the anticorrosion composite coating of the steel structure, the binding force of the anticorrosion coating and the steel structure substrate is high and up to an average of 12.0 MPa which is far beyond the national standard, thus the purpose of long-term anticorrosion can be achieved and the appearance of the structure is improved.
Description
technical field [0001] The invention relates to steel structure surface anticorrosion, in particular to a construction technology of steel structure anticorrosion composite coating. Background technique [0002] The surface of the metal structure exposed to the wild environment 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 metal structure body from being corroded. However, when the anti-corrosion coating on the surface of the metal structure has poor performance and is damaged, the metal structure body will also be exposed and rusted. Metal 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. [0003] Since the zinc-aluminum coating technology was invented in the United Stat...
Claims
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Inventor 丁春燕
Owner 丁春燕