1. Superior tribological and anti-corrosion performance of corrosion inhibitors intercalated LDH-MAO coating on AZ31 Mg alloys.
- Author
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Zhao, Chen, Wang, Xingwei, Li, Chuanpeng, Liu, Yu, Sun, Shuang, Yang, Shuangshuang, Sun, Yuchen, Peng, Zhenjun, Yu, Qiangliang, Cai, Meirong, Yu, Bo, Zhou, Feng, and Liu, Weimin
- Subjects
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COMPOSITE coating , *SODIUM dodecyl sulfate , *LAYERED double hydroxides , *INTERFACIAL friction , *MECHANICAL wear , *MAGNESIUM alloys , *CORROSION & anti-corrosives - Abstract
Sodium dodecyl sulfate (SDS) and 8-Hydroxyquinoline (8-HQ) intercalated layered double hydroxides (LDH) sheets were in-situ formed in MAO layer to prepare a composite coating (CI@LDH-MAO) on AZ31 magnesium alloy. This composite coating demonstrates commendable anti-corrosion performance, primarily attributed to the formation of LDH sheets and insoluble Mg(HQ) 2 compounds. The electrochemical impedance modulus of the composite coating surpasses that of the MAO coating by three orders of magnitude after immersion of 360 h. Concurrently, the CI@LDH-MAO composite coating exhibits exemplary tribological properties, characterized by a friction coefficient of approximately 0.19 and a wear rate of (11.5 ± 1.5)× 10−6 mm3/(N·m). This outstanding tribological performance can be ascribed to enhanced interaction of lubricants with the friction interface by 8-HQ and SDS anions. • 8-HQ and SDS anions intercalated LDH was in-situ formed in MAO coating. • The composite coating has excellent tribological and anti-corrosion performance. • The COF was reduced by > 80% and the wear rate was reduced by > 50%. • 8-HQ and SDS anions facilitated the interaction of lubricants with friction interface. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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