Method of preparing corrosive thermal insulation anti-ablation composite coating on light alloy surface
A composite coating and light alloy technology, which is applied to the device for coating liquid on the surface, anti-corrosion coating, coating, etc., can solve the problems of poor bonding force, poor heat resistance performance, difficult control of coating quality and thickness, etc.
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[0009] Specific embodiment 1: The method of preparing the anti-corrosion, heat insulation and anti-ablation composite coating on the surface of the light alloy in this embodiment is carried out in the following steps: 1. After degreasing the surface of the light alloy, connect the positive output end of the pulse power supply to the light alloy , The negative output end of the pulse power supply is connected with stainless steel, and then the light alloy and stainless steel are put into the electrolytic cell, and the alkaline electrolyte in the electrolytic cell is submerged in the light alloy and stainless steel to ensure that the light alloy and stainless steel are not in the electrolytic cell. Contact; 2. Turn on the power supply, control the output voltage of the pulse power supply to be 400-650V, the frequency is 400-800Hz, the duty cycle is 4%-20%, the output time is 30-100min, and the temperature of the electrolyte is controlled during the electrification process When the t...
Example Embodiment
[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is: in step 2, the output voltage of the control pulse power supply is 450-550V, the frequency is 500-700Hz, the duty cycle is 8%-16%, and the output time It is 50~80min. The other steps and parameters are the same as in the first embodiment.
Example Embodiment
[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is: in step 2, the output voltage of the control pulse power supply is 500V, the frequency is 600Hz, the duty cycle is 12%, and the output time is 65min. The other steps and parameters are the same as in the first embodiment.
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