Efficient corrosion-resistant environment-friendly film-coated heat exchanger preparation method

Abstract

The invention discloses an efficient corrosion-resistant environment-friendly film-coated heat exchanger preparation method. The preparation method is characterized by comprising the following steps of S1, cleaning heat exchanger pipe sections, keeping the inner walls of the heat exchanger pipe sections clean and free of oil stains and blots, and welding the heat exchanger pipe sections into a heat exchanger coiled pipe section; S2, preparing a closed protective film coating; S3, pouring the prepared closed protective film coating into the heat exchanger coiled pipe section, and taking out theredundant closed protective film coating from the coiled pipe section after the protective film coating is fully absorbed; and S4, putting the heat exchanger coiled pipe section with the closed protective film coating attached into a baking line with the temperature of 100 DEG C-240 DEG C for baking for 2 min-10 min. According to the method, a brand-new environment-friendly film-coated heat exchanger is adopted, a special sheet-shaped structure of the heat exchanger can play a physical barrier role to prevent the generation of corrosion and has super-hydrophobic property, and the environment-friendly protective film has excellent mechanical properties, adhesiveness, high temperature resistance and corrosion resistance, so that corrosion and water leakage of a copper pipe in a water heatercan be effectively prevented, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers with environmentally friendly coatings, and in particular relates to a method for preparing heat exchangers with efficient anti-corrosion and environmentally friendly coatings. Background technique [0002] The heat exchange tubes of existing gas appliance heat exchangers are mostly made of oxygen-free copper. Copper is a metal material with a high thermal conductivity, with a thermal conductivity of 377W / m·K. However, the serpentine copper coil in the cross-flow heat exchanger is There is a large temperature difference in the direction of water flow. Such a temperature gradient is not conducive to heat transfer and will reduce the heat transfer performance of the heat exchanger. Moreover, if the water heater is used in poor water quality, the copper pipe will be corroded and cause water leakage. Although the developed stainless steel heat exchanger can better solve the problem of corrosio...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a heat exchanger preparation method with high-efficiency anti-corrosion and environmentally friendly coating to solve the problem that the passivation film cannot work well under the impact of water flow for a long time when using the heat exchanger. The effect is limited, and the impact corrosion is caused by eddy currents caused by mechanical debris in the water, causing ulcers and erosive damage at the inlet end of the pipe, and the interface bonding force of the copper substrate and the bonding strength of the protective film itself are not high.

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