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SURFACE & COATINGS TECHNOLOGY · 2015 · IF 1.998

Magnet-induced fabrication of a superhydrophobic surface on ZK60 magnesium alloy

Zhaozhong Qiu,Jia Sun,Rui Wang,Yushen Zhang,Xiaohong Wu

In this work, magnetic Fe 3 O 4 nanoparticles treated with hexadecyltrimethoxysilane were used as immobilization material. Under the anchor of dopamine, the magnetic nanoparticles can be easily deposited on the solid substrate. Array structure was formed by the coated Fe 3 O 4 on the magnesium alloy with the magnet-induced assembly technique. The hierarchical rough surfaces on the substrates form a superhydrophobic coating with a water contact angle as high as 157°. Of note is that the coating significantly decreased the corrosion rate compared with the pristine magnesium alloy in 3.5 wt.% NaCl solution.

CAS / MDL: 16415-12-6

研究领域: 材料科学 · 表面工程 · 腐蚀科学

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PROGRESS IN ORGANIC COATINGS · 2023 · IF 6.6

Polypyrrole/zinc bilayer coating on ZK60 magnesium alloy for enhanced corrosion protection in Hank's solution

Wei Luo,Kai Qi,Yubing Qiu,Xingpeng Guo

A polypyrrole/zinc (PPy/Zn) bilayer coating is prepared to significantly improve the corrosion resistance of ZK60 magnesium alloy in 37 °C Hank's solution to meet the requirements for biodegradable metals. The zinc coating composed of dense and uniform flake-like zinc crystals displays good abrasion resistance and adhesion strength , acting as a vital intermediate layer for growing the PPy film doping with tartrate anions (TA − ). The prepared PPy/TA films (10, 20 and 28 μm) on the Zn coating are compact and have high stability in Hank's solution. The electrochemical and hydrogen evolution tests for PPy/Zn/ZK60 specimens show that the PPy/TA film's stability determines the protective performance of PPy/Zn coating in a long immersion period. The PPy(20 μm)/Zn coating has the longest protection time (40 ± 4 days), and too thick PPy film (28 μm) damages its structure to accelerate breakage, developing local corrosion quickly on ZK60. The corrosion mechanism involved is discussed.

CAS / MDL: 109-97-7

研究领域: 材料科学 · 腐蚀工程 · 生物医学工程

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Magnet-induced fabrication of a superhydrophobic surface on ZK60 magnesium alloy

Polypyrrole/zinc bilayer coating on ZK60 magnesium alloy for enhanced corrosion protection in Hank's solution