Preparation and Anti-corrosion Performance of Super-hydrophobic Film on the Surface of Bronze Covered with Patina

WANG Min, CAI Lan-kun, TANG Yi-jing, CAI Jing-fang, ZHOU Hao, WU Lai-ming, YAN Ying

Surface Technology ›› 2020, Vol. 49 ›› Issue (11) : 50-57, 123.

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Surface Technology ›› 2020, Vol. 49 ›› Issue (11) : 50-57, 123. DOI: 10.16490/j.cnki.issn.1001-3660.2020.11.006
Special Topic—Corrosion Inhibitor and Its Application Technology

Preparation and Anti-corrosion Performance of Super-hydrophobic Film on the Surface of Bronze Covered with Patina

  • WANG Min1, CAI Lan-kun1, TANG Yi-jing1, CAI Jing-fang1, ZHOU Hao2, WU Lai-ming2, YAN Ying3
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Abstract

The work aims to study the preparation process and anti-corrosion performance of super-hydrophobic (SH) film on the surface of bronze with Cu2O. Straightforward immersion method was adopted to prepare the SH film on the surface of bronze with Cu2O. The effect of the ratio of n-dodecyl mercaptan to myristic acid and immersion time on the construction and corrosion resistance of SH film was investigated by single factor experiments. The contact angle test, electrochemical measurement method and surface analysis means were used to evaluate the surface properties, structure and stability of SH film. Hydrophobic long chains of n-dodecyl mercaptan and myristic acid were assembled on the surface of bronze with Cu2O. The optimal preparation conditions of SH film included a mixed solution of 5.0 nmol/L n-dodecyl mercaptan and 1.0 nmol/L myristic acid and an immersion time of 1.0 h. Under the above conditions, the contact angle and corrosion inhibition efficiency reached 157.2° and 97.21% respectively. At the same time, the electrochemical impedance spectroscopy suggested that, the SH film had good corrosion resistance when the charge transfer resistance increased by two orders of magnitude. The corrosion efficiency of the SH film still reached 96.56% after immersion in atmospheric simulation solution for 30 d, indicating the excellent stability. The SH film constructed on the surface of bronze with Cu2O can effectively improve the corrosion resistance and hydrophobicity.

Key words

bronze; super-hydrophobic; straightforward immersion; corrosion resistance; stability

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WANG Min, CAI Lan-kun, TANG Yi-jing, CAI Jing-fang, ZHOU Hao, WU Lai-ming, YAN Ying. Preparation and Anti-corrosion Performance of Super-hydrophobic Film on the Surface of Bronze Covered with Patina[J]. Surface Technology. 2020, 49(11): 50-57, 123
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