Preparation and Corrosion Resistance of Superamphiphobic Surface on B10 Cu-alloy
A superamphiphobic surface film with good corrosion protection durability was successful-ly prepared on B10 Cu-alloy by chemical etching with 1.5 mol/L FeCl3 solution and then modifying with 1H,1H,2H,2H-perfluorodecyltriethoxysilane.The contact angle of water and ethylene glycol on the pre-pared surface is 158° and 151° respectively.The morphology,chemical composition and corrosion resis-tance of the superamphiphobic surface film/B10 Cu-alloy were characterized by means of SEM,XRD,EDS and XPS as well as EIS test and Tafel polarization curve and electrochemical test.The results show that compared with the bare B10 Cu-alloy,the corrosion potential of the superamphiphobic surface film/B10 Cu-alloy is positively shifted to-0.248 V,its corrosion current density Icorr=2.05 × 10-6 A·cm-2 de-creases by one order of magnitude,and the charge transfer resistance increases by one order of magni-tude,showing excellent corrosion resistance.The charge-transfer resistance of the superamphiphobic film/B10 Cu-alloy after immersion in 3.5％NaCl solution for 5 d is still significantly higher than that of the bare Cu-alloy,in other words,it still maintains good corrosion resistance.
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