Preparation method of surface self-cleaning coating of weathering resistant steel
A technology of self-cleaning coating and weathering steel, applied in the direction of coating, metal material coating process, liquid chemical plating, etc., can solve the problems of low efficiency, complicated operation of hydrophobic surface, no relevant literature reports, etc., and achieve flexibility High, good hydrophobic effect, low cost effect
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[0030] The invention provides a method for preparing a self-cleaning coating on the surface of weathering steel. In this method, the weathering steel that has formed a stable rust layer is treated with modified SiO 2 After soaking in the suspension for a period of time or spraying, then drying, the hydrophobic treatment of the weathering steel surface is completed, so that the surface can achieve self-cleaning function.
[0031] The weathering steel that has formed a stable rust layer is that the surface rust layer evenly covers the surface of the weathering steel, and at the same time, an amorphous spinel oxide layer with a thickness of about ≥ 50 μm is formed between the rust layer and the matrix.
[0032] Modified SiO 2 The preparation method of the suspension is as follows:
[0033] SiO 2 Add nanoparticles to absolute ethanol, disperse nanoparticles by ultrasonic vibration for 10 minutes, and obtain SiO 2 Anhydrous ethanol suspension, the catalyst M is poured into SiO ...
Embodiment 1
[0044] The present embodiment provides a kind of preparation method of superhydrophobic coating, and substrate material is SPA-H model weathering steel, and its steps are as follows:
[0045] 1) Sample: Weathering steel with a stable rust layer formed. The surface rust layer evenly covers the surface of the weathering steel, and at the same time, an amorphous spinel oxide layer with a thickness of about ≥ 50 μm is formed between the rust layer and the substrate.
[0046] Surface modification: Weigh 4.5g of SiO with a particle size of 10nm 2 Put the particles into 300ml of absolute ethanol, ultrasonically vibrate for 10 minutes to disperse the nanoparticles, pour 30ml of catalyst M into it with a glass rod and stir evenly to obtain A solution; weigh 4.64g of low surface energy substance N, and then mix 20ml Add absolute ethanol to it, and stir it evenly with a glass rod to obtain solution B; (M is one of glacial acetic acid, dilute hydrochloric acid, ammonia water, and hydroge...
Embodiment 2
[0049] The present embodiment provides a kind of preparation method of superhydrophobic coating, and substrate material is SPA-H model weathering steel, and its steps are as follows:
[0050] 1) Sample: weathering steel with a stable rust layer formed, the surface rust layer evenly covers the surface of the weathering steel, and an amorphous spinel oxide layer about ≥ 50 μm thick is formed between the rust layer and the substrate.
[0051] Surface modification: Weigh 4.5g of SiO with a particle size of 10nm 2 Put the particles into 300ml of absolute ethanol, ultrasonically vibrate for 10 minutes to disperse the nanoparticles, pour 30ml of catalyst M into it with a glass rod and stir evenly to obtain A solution; weigh 4.64g of low surface energy substance N, and then mix 20ml Add absolute ethanol to it, and stir it evenly with a glass rod to obtain solution B; (M is one of glacial acetic acid, dilute hydrochloric acid, ammonia water, and hydrogen peroxide; N is stearic acid, po...
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Abstract
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