Salt-spray-resistant flexible anti-drag coating layer as well as preparation method and application thereof
A salt spray-resistant and flexible technology, used in coatings, anti-corrosion coatings, devices for coating liquids on surfaces, etc., can solve the problems of poor salt resistance, complex production process, unstable structure, etc., and achieve good corrosion resistance. The effect of simple performance and preparation process
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[0032] As an aspect of the technical solution of the present invention, it relates to a preparation method of a salt spray-resistant flexible drag-reducing coating comprising:
[0033] Mix fluorine-containing silicone rubber, catalyst and crosslinking agent evenly, and react to form a mixed solution;
[0034] The mixed solution is applied on the surface of the substrate, and then cured to obtain a flexible drag-reducing coating resistant to salt spray.
[0035] In some preferred embodiments, the fluorine-containing silicone rubber may include room temperature vulcanized fluorosilicone rubber, such as RTV, but is not limited thereto.
[0036] In some preferred embodiments, the catalyst is any compound having a hydrolyzable group bonded to a silicon atom, preferably including tetraethyl orthosilicate, but not limited thereto.
[0037] In some preferred embodiments, the crosslinking agent may include dibutyltin dilaurate, but is not limited thereto. The cross-linking agent sele...
Embodiment 1
[0062] Put fluorine-containing silicone rubber (room temperature vulcanized fluorosilicone rubber), dibutyltin dilaurate, and ethyl orthosilicate in a beaker in a weight ratio of 100:5:2, and use a mixer to automatically stir at room temperature at a speed of 50r / min , stirring time is 3min. Put the prepared mixed solution in the Bridge JSHH12B spray gun, spray at room temperature 22°C, spray speed 50ml / min, and spray distance 150mm, and spray on the 15cm radius pattern of the rotating disc resistance test platform Such as figure 1 As shown, it was cured and dried at room temperature. The curing time was 12 hours. The thickness of the final coating was 0.4 mm to 1.2 mm. The resistance test was carried out at a speed of 400 to 700 r / min. The experimental results are shown in Table 1. figure 2 Table 1 summarizes the drag reduction rate diagrams of the smoother surface of the salt spray resistant flexible drag reduction coating prepared in this example under different water flo...
Embodiment 2
[0067] Put fluorine-containing silicone rubber (room temperature vulcanized fluorosilicone rubber), dibutyltin dilaurate, and ethyl orthosilicate in a beaker in a weight ratio of 100:5:2, and use a mixer to automatically stir at room temperature at a speed of 20r / min , stirring time is 1min. Put the prepared mixed solution in the Bridge JSHH12B spray gun, spray at room temperature 22°C, spray speed 60ml / min, and spray distance 100mm, and spray on the 15cm radius pattern of the rotating disc resistance test platform Such as figure 1 shown, and carried out curing and drying at room temperature, the curing time is 12h, the thickness of the final coating is 0.4mm ~ 1.2mm, and the resistance test experiment is carried out at a speed of 400 ~ 700r / min. The experimental results are shown in Table 2. image 3 Table 2 summarizes the drag reduction rate diagrams of the smoother surface of the salt spray resistant flexible drag reduction coating prepared in this example at different dis...
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