金涛,何卫平,廖圣智,刘成臣,王浩伟,刁鹏.2024-T62铝合金涂层外场腐蚀环境下电化学性能研究[J].装备环境工程,2016,13(1):8-13,28. JIN Tao,HE Weiping,LIAO Shenzhi,LIU Chengchen,WANG Haowei,DIAO Peng.Electrochemical Property for 2024-T62 Aluminum Alloy Surface Protective Coating in the Presence of Outfield Corrosion[J].Equipment Environmental Engineering,2016,13(1):8-13,28. |
Objective To evaluate the corrosion resistance performance of the coating under the condition of natural exposure. Methods Field exposure experiments of 2024-T62 aluminum alloy coating (N1 and N2) under comprehensive corrosion conditions including wet and heat exposure, UV irradiation and salt spray were carried out, selecting the tropical marine environment in Xisha as the natural exposure field. Electrochemical methods were adopted to investigate the corrosion resistance of the exposed coatings after immersing in 3.5% NaCl for different time. Results The results showed that the electrochemical impedance of the coating after the field exposure decreased, indicating the significant accelerating effect of the comprehensive corrosion condition, Ccoat-T increased and Rcoat decreased continuously with the elongation of immersion time in 3.5% NaCl. Conclusion The electrochemical impedance of the exposed N1 coating was relatively high, implying its strong corrosion resistance. |