화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.95, 134-147, March, 2021
DOI10.1016/j.jiec.2020.12.016  Export Citation
Chemical modification of LDH conversion coating with diethyldithiocarbamate as a novel anti-corrosive film for AA2024-T3
Iman Mohammadi, Taghi Shahrabi†, Mohammad Mahdavian1, †, and Mazdak Izadi2
  • Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, P. O. Box 14115-143, Tehran, Iran
  • 1Surface Coatings and Corrosion Department, Institute for Color Science and Technology, Tehran, Iran
  • 2Department of Materials Engineering, Hamedan University of Technology, Hamedan, Iran
E-mail:,
Nowadays, layered double hydroxide conversion coatings are a potential eco-friendly alternative for hazardous and carcinogenic chromate conversion coatings. In this work, Zn-Al LDH conversion coating (LDH-CC) modified with diethyldithiocarbamate (DEDTC) molecules, as a smart inhibitive film, was synthesized on AA2024-T3. For this purpose, the LDH-CC was prepared on the AA2024-T3 by an in-situ hydrothermal route, and then intercalated with DEDTC molecules through an anion-exchange procedure. The intercalation of the DEDTC into the structure of the LDH-CC was studied using XPS, XRD, ATR-FTIR, SEM-EDS, and TGA techniques. All of the characterization techniques proved the successful intercalation of the DEDTC molecules in the structure of the LDH-CC. Results indicated that the chemical modification treatment increases in the gallery space of LDH-CC by the intercalation of DEDEC molecules in the coating structure. Also, electrochemical tests were implemented in 3.5 wt. % NaCl media to study the anti-corrosion performance of the coatings. The electrochemical test results showed that the presence of the DEDTC molecules dramatically enhanced the anti-corrosion behavior of the LDH-CC due to the induction of the active inhibition mechanism.
Keywords:Layered double hydroxide;Diethyldithiocarbamate;AA2024-T3;Electrochemical test;Conversion coating
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