期刊
JOURNAL OF MAGNESIUM AND ALLOYS
卷 7, 期 2, 页码 193-202出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2019.05.006
关键词
Magnesium alloy; Superhydrophobicity; Corrosion resistance
资金
- National Key Research and Development Program of China [2016YFB0301102]
- Fundamental Research Funds for the Central Universities [2018CDGFCL0005]
- Postgraduate Education Fund of Chongqing University [201704020]
A one-step electrodeposition method was used to construct a superhydrophobic coating on the surface of magnesium alloy. Using magnesium nitrate and ethanol solution of stearic acid as electrolyte, four groups of electrolytes with different ratios of stearic acid and magnesium nitrate were designed to explore the influence of electrolyte to the process. The contact angles of the four coating samples were 136.4 +/- 5.8 degrees, 152.7 +/- 2.8 degrees, 156.2 +/- 4.9 degrees and 155.1 +/- 4.4 degrees The addition of magnesium nitrate in the solution increased the hydrogen evolution reaction in the electrodeposition process, which was not conducive to electrodeposition process. During the deposition process, the sample prepared in a molar ratio of stearic acid to magnesium nitrate of 10:1 had the best corrosion resistance, and its corrosion circuit density was 3.74 x 10(-8) A/cm(2), far lower than the corrosion current density of the magnesium alloy substrate. (C) 2019 Published by Elsevier B.V. on behalf of Chongqing University.
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