Electrochemical method for preparing superhydrophobic Ni-P-Al2O3 nano composite coating on 45-steel surface

• Main Authors: LI HENGZHENG, KANG MIN, ZHANG YIN
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2020
• Subjects: APPARATUS THEREFOR; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

The invention provides an electrochemical method for preparing a superhydrophobic Ni-P-Al2O3 nano composite coating on a 45-steel surface. The electrochemical method is simple, efficient, safe, easy to control, mild in reaction condition and low in cost, and can achieve large-area preparation without damaging the original metal surface. According to the method for preparing the superhydrophobic Ni-P-Al2O3 nano composite coating, an electrochemical deposition method is firstly adopted to prepare the Ni-P-Al2O3 nano composite coating on the 45-steel substrate surface, the coating has superhydrophobicity after being subject to electrochemical anodic dissolution and then modification with fluorosilane, and the contact angle can reach more than 150 degree. The method comprises the following steps: 1, carrying out pretreatment the 45-steel substrate; 2, preparing a Ni-P-Al2O3 plating solution; 3, preparing the Ni-P-Al2O3 nano composite coating by adopting the electrochemical deposition method; 4, carrying out elect