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MENG Xinpei, JIN Linkui, FANG Manting, LIN Quan, HUANG Yihao, LI Xiaohui, HE Ping. Causes of black spots on surface of AA3003 aluminum alloy radiator connecting piece[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2022, 58(1): 41-44,51. DOI: 10.11973/lhjy-wl202201011
Citation: MENG Xinpei, JIN Linkui, FANG Manting, LIN Quan, HUANG Yihao, LI Xiaohui, HE Ping. Causes of black spots on surface of AA3003 aluminum alloy radiator connecting piece[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2022, 58(1): 41-44,51. DOI: 10.11973/lhjy-wl202201011
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Causes of black spots on surface of AA3003 aluminum alloy radiator connecting piece

  • 1. Precision Intelligent Manufacturing Technology Research and Application Engineering Center, Dongguan Polytechnic, Dongguan 523808, China;

  • 2. Guangdong Dongguan Quality Supervision Testing Center, Dongguan 523808, China;

  • 3. National Mold Product Quality Supervision and Inspection Center, Dongguan 523808, China

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  • Received Date: September 01, 2021
    Graphical Abstract
    • Abstract
  • During the processing of the AA3003 aluminum alloy radiator connecting piece, there were large areas of black spots appeared on the surface. Through macro observation, chemical composition analysis, scanning electron microscopy and energy spectrum analysis, the reasons for black spots on the surface of connecting piece were analyzed. The results showed that when cleaning and lubricating the equipment, the synthetic engine oil accidentally drop on the surface of connecting piece. During the brazing process, the synthetic engine oil undervent coking reaction to form black spots.
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    • References (12)
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