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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2013, Vol. 34 ›› Issue (6): 1493-1500.doi: 10.7527/S1000-6893.2013.0245

• Material Engineering and Mechanical Manufacturing • Previous Articles    

Influence of Temperature on Initial Corrosion Behavior of Aluminum Alloy 2A12 in Simulated Tank Water Environment

LI Chenyu1, ZHU Liqun1, LIU Huicong1, YE Xubin2, LIU Jianzhong2, HUANG Yi2   

  1. 1. Key Laboratory of Aerospace Materials and Performances, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
    2. Beijing Institute of Aeronautical Materials, Beijing 100095, China
  • Received:2012-07-04 Revised:2012-08-16 Online:2013-06-25 Published:2012-09-29
  • Contact: 10.7527/S1000-6893.2013.0245 E-mail:liuhc@buaa.edu.cn

Abstract:

Aluminum alloy corrosion in airplane tank water is a serious problem. The influence of temperature on the initial corrosion behavior of aluminum alloy 2A12 in a simulated tank water environment is studied by observing the corrosion morphology, maximum pitting corrosion depth, maximum pitting corrosion area, surface corrosion damage ratio, EIS, etc. The results indicate that pitting corrosion depth, pitting corrosion area and surface corrosion damage ratio increase with increasing temperature. In particular, at temperatures 65℃ and 75℃, corrosion speed increases dramatically. In the simulated tank water of 25, 35, 45 and 55℃, the variation in maximum pitting corrosion depth and area with time all fit well withthe power function. At temperatures 65℃ and 75℃, they both fit well with the least square polynomial fitting. In addition, EIS indicates that corrosion rate in simulated tank water of three typical temperatures (25, 55, 75℃) increases with temperature increase.

Key words: aluminum alloys, simulated tank water, pitting corrosion depth, pitting corrosion area, corrosion damage ratio

CLC Number: