Acta Metallurgica Sinica (English Letters) ›› 2022, Vol. 35 ›› Issue (2): 285-303.DOI: 10.1007/s40195-021-01237-x

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Effects of Trace Cl-, Cu2+ and Fe3+ Ions on the Corrosion Behaviour of AA6063 in Ethylene Glycol and Water Solutions

Lei Fan1, Juantao Zhang1, Hao Wang2, Yang Liu2, Yu Cui3(), Cheng Wang3(), Rui Liu3,4, Dongxiao Xu2   

  1. 1State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi’an 710077, China
    2NO. 1 Gas Production Plant of Changqing Oilfield Company, Jingbian 718500, China
    3Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    4Shenyang National Laboratory for Materials Science, School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
  • Received:2020-11-17 Revised:2021-01-13 Accepted:2021-01-26 Online:2022-02-10 Published:2021-04-26
  • Contact: Yu Cui,Cheng Wang
  • About author:Cheng Wang, wangcheng@imr.ac.cn
    Yu Cui, ycui@imr.ac.cn;

Abstract:

The effects of Cl-, Cu2+ and Fe3+ ions and their combinations on the corrosion behaviour of aluminium alloy 6063 (AA6063) in ethylene glycol and water solutions at 50 °C were investigated by electrochemical and immersion methods. Cl - resulted in pitting corrosion of the alloy. In the Cl--free solutions, Fe3+ was prone to accelerate uniform corrosion, while Cu2+ tended to accelerate pitting corrosion. Severe pitting corrosion of AA6063 was observed in the cases of Cl- combined with Cu2+ or Fe3+, especially in the case of Cl- combined with Cu2+ and Fe3+ ions.

Key words: Aluminium, Polarization, Weight loss, Pitting corrosion