Preparation of Superhydrophobic Structure on the Surface of Building 45 Steel Structure and Its Corrosion Resistance Analysis

In order to improve the superhydrophobic capacity of the surface of 45 steel structure, the superhydrophobic structure was prepared on the surface of 45 steel by means of one step rapid electrodeposition. The preparation parameters were optimized by means of experimental test, and the structure and corrosion performance of the superhydrophobic structure were characterized. The optimal process was determined by contact angle and rolling angle analysis. Results showed that the optimized process was as follows: the electrolyte was composed of 0.05 mol/L stearic acid and 40 mg/L benzotriazole, the electrodeposition voltage was 8 V, and the electrodeposition time was 10 h. The microstructure and corrosion resistance of samples prepared by the optimal process were analyzed. After superhydrophobic treatment on the surface of 45 steel samples, many protrusions with uniform dimensions and distribution patterns were formed and the obvious pits appeared. After superhydrophobic treatment on 45 steel, higher self - corrosion potential was obtained, indicating that the 45 steel modified by superhydrophobic treatment had stronger corrosion resistance to 3.5% NaCl solution, and could improve the corrosion resistance of anode and cathode at the same time.