Investigation of Microstructures and Anti-corrosion Properties of Aluminium-Zinc Alloys

✍ Scribed by Zhong-Nan Qi; Chang-Qiao Zhang; Ruo-Xi Wang; Cheng-Bu Liu; Zheng-Long Chen

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 123 KB
• Volume: 23
• Category: Article
• ISSN: 0256-7660
• DOI: 10.1002/cjoc.200591182

✦ Synopsis

Abstract

Electro‐chemical experiment was carried out to test the corrosion rates of aluminium‐zinc hot‐dip coating. It is shown that 5.3% aluminium‐zinc alloy (weight ratio) has superior anti‐corrosion property. The determined microstructure has displayed amorphous structure composed of nanometer sized particle of the system. The analysis indicated large negative change of Gibbs energy of 5.3% aluminium‐zinc system. Molecular dynamics simulation showed that 5.3% aluminium‐zinc system has very different behavior from other systems. A phase transition of this particular system was observed from simulation. The transition temperature was determined around 400 K. The simulation indicated that 5.3% aluminium‐zinc system is amorphous over temperature range from 300 to 900 K, supporting the inference from experiments that amorphous solid of aluminium‐zinc alloy has special anti‐corrosion character.