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Zinc and aluminum spraying for corrosion protection of metal structures such as hydroelectric power station sluice gates.
Release time:
2020-08-30 18:11
Source:
Metal structures such as hydroelectric power station sluice gates Zinc and aluminum spray for corrosion protection Construction
Steel gates, trash racks, and gate slot embedded parts in hydraulic metal structures are exposed for long periods to alternating dry and wet conditions, submersion underwater, and the erosive effects of flowing water. They are also subjected to corrosion caused by atmospheric factors, sunlight, temperature fluctuations, aquatic organisms, as well as impact and abrasion from sediment and other floating debris, making the steel surfaces highly susceptible to corrosion. Once corrosion sets in, the load-bearing capacity of the steel structure gradually declines, seriously compromising the safe operation of the project. To effectively control steel corrosion and extend the service life of the gates, it is essential to adopt efficient anti-corrosion measures. In hydropower station projects, all metal structures (except for the back sides of hoisting mechanisms and embedded parts) are protected with a long-term anti-corrosion coating consisting of thermally sprayed zinc metal, followed by sealing with zinc spray and topcoating with paint. For the back sides of gate slot embedded parts, after sandblasting to remove rust, a cement-sand mortar containing a caustic soda solution is applied. To facilitate quality control during construction and ensure effective anti-corrosion performance, the key technical requirements for thermal spraying of metallic zinc in hydropower station projects have been formulated, referencing current national standards and relevant documents such as the "Code for Corrosion Protection of Metal Structures in Hydraulic Structures."
Relevant Information
The complete set of plasma-sprayed equipment has been shipped to the customer’s site in Thailand.
Core spraying equipment: SX-80 plasma spray main unit, with a 15,000℃ flame suitable for multiple materials including zirconia and silicon carbide; powder feeding accuracy of ±1%, and coating thickness tolerance ≤ ±5 μm. Environmental protection support system: Customized soundproof booth + pulse dust collector—effectively addressing spray noise pollution while achieving highly efficient dust recovery, compliant with Thai environmental standards. Automated equipment: 6-axis industrial robot + intelligent spray cart, enabling precise spraying of complex workpieces and automated loading/unloading, boosting production efficiency by 40%.
On-site engineers provide hands-on training, focusing on the core operations of plasma spraying equipment such as the SX-80. Sanxin has customized a complete solution for its customers, including an automated spraying robotic arm, a soundproof booth, and a dust removal system—ensuring both high spraying efficiency and compliance with environmental standards.
Guangzhou Sanxin Thermal Spraying Turntable Shipment
Guangzhou Sanxin Company manufactures single-station and multi-station thermal spray turntables, which can be paired with plasma equipment, supersonic equipment, and arc equipment. We offer rapid, customized production tailored to customer requirements and product dimensions. A thermal spray turntable is a high-precision rotary worktable specifically designed for thermal spraying processes—including flame spraying, plasma spraying, and arc spraying. By providing controllable rotational speed and exceptional stability, it ensures uniform coating thickness on the workpiece surface, thereby enhancing spraying efficiency and quality.
SX-80 plasma equipment is being used at a customer site in Russia.
SX-80 plasma equipment is being used at a customer site in Russia.
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