Effects of hydrophobic surface modification and hydrogen peroxide passivation on the corrosion behavior of aluminum = 소수성 표면처리와 과산화수소 처리가 알루미늄의 부식 특성에 미치는 영향

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In this study, aluminum surface with superior corrosion resistance and hydrophobic properties was prepared by simple and low cost method. Aluminum surfaces were fabricated by hydrochloric acid etching, hydrogen peroxide passivation, and stearic acid modification treatment. The hydrogen peroxide treatment increased the amount of oxygen on the oxide layer of aluminum surface and improved the corrosion resistance. A rough and hierarchical structure was formed on aluminum surface by hydrochloric acid etching, and the alkyl chain of stearic acid was chemically grafted onto the aluminum surface, which changes the hydrophilic surface to hydrophobic. The hydrophobic properties of aluminum were analyzed by measuring the water contact angle, and the results showed that the water contact angle increased significantly to 143˚compared to that of the untreated specimen. Finally, corrosion resistance of fabricated aluminum surface was analyzed by potentiodynamic test and electrochemical impedance spectroscopy in sea water condition. As a result, corrosion resistance of the aluminum modified with hydrogen peroxide and stearic acid was improved 25 times compared to untreated specimens in a sea water environment.
Advisors
Kwon, HyukSangresearcher권혁상researcher
Description
한국과학기술원 :신소재공학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 신소재공학과, 2017.2,[v, 53 p. :]

Keywords

aluminum; hydrophobic; hydrogen peroxide passivation; stearic acid modification; corrosion resistance; 알루미늄; 소수성; 과산화수소 부동태화; 스테아르산; 내식성

URI
http://hdl.handle.net/10203/243135
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=675262&flag=dissertation
Appears in Collection
MS-Theses_Master(석사논문)
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