Abstract
The paper considers the dependence of the continuity of the sol-gel coating of carbon fiber on the preliminary anodic oxidation of the surface in a sodium hydroxide solution. The effect of the treatment time, the voltage between the cathode and the anode, NaOH concentration in the electrolyte, and the temperature of the electrolyte was investigated. It is shown that with an increase in NaOH concentration in the electrolyte, the area of uncoated fiber surface sections increases, the continuity of the coating decreases, while the coating obtained without preliminary surface treatment has sufficient continuity of at least 93%. Changes in other parameters (temperature, time, voltage) of preliminary electrochemical surface treatment in the ranges under study did not allow us to fix regularities other than the given one.
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