Facile synthesis of ZnOHF/ZIF-8 composite coating for corrosion protection of Zn–Cu–Ti alloy

[摘要] ZnOHF/ZIF-8 (Zeolitic Imidazolate Frameworks-8) composite with a thickness of about 13.4 μm was coated on Zn–Cu–Ti alloy via hydrothermal route for the first time and its corrosion resistance performance was investigated in 3.5% NaCl solution. It is found that the I corr of the composite-coated alloy (7.03 × 10 –4 A/cm 2 ) is lower than that of alloy substrate (12.47 × 10 –4 A/cm 2 ). Meanwhile, the composite-coated alloy shows a higher corrosion product resistance of 121.2 Ω cm 2 in comparison with that of the alloy substrate (102.2 Ω cm 2 ). Moreover, after 6 days of immersion, the composite-coated alloy exhibits a lower corrosion layer thickness. Its coating and corrosion layer is only about 42.5 μm, but for the alloy substrate this value is 67 μm. This work confirms the ZnOHF/ZIF-8 composite can be used as an effective anti-corrosion coating for Zn alloy.

[学科分类] 计算机科学（综合）