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Open AccessArticle

Ultrasonic Sensors-Assisted Corrosion Studies on Surface Coated AlSi9Cu3 Alloy Die Castings

1
Department of Mechanical and Electromechanical Engineering, National ILan University, No. 1, Sec. 1, Shenlung Rd., ILan City, ILan County 26041, Taiwan
2
Department of Manufacturing Engineering, School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore 632014, India
3
Department of Mechanical Engineering, Karpagam Academy of Higher Education, Coimbatore 641021, India
4
School of Information Technology and Engineering, Vellore Institute of Technology (VIT), Vellore 632014, India
5
School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore 632014, India
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(1), 85; https://doi.org/10.3390/coatings10010085
Received: 19 November 2019 / Revised: 14 January 2020 / Accepted: 16 January 2020 / Published: 19 January 2020
(This article belongs to the Special Issue Coatings for Machining, Stamping, Moulding and Other Tools)
A novel phenomenon known as Industry X.0 is becoming extremely popular for digitizing and reinventing business organizations through the adaption of rapid and dynamic technological, innovational, and organizational changes for attaining the profitable revenue. This work investigates the die-casted commercially pure aluminum alloyed with 9% silicon and 3% copper (AlSi9Cu3) that is produced through the gravity die casting process. Further, the degradation of surface coating on die-casted AlSi9Cu3 alloy was explored. The acrylic paint electrodeposition (ED) coat, 2-coat polyester without primer and 3-coat polyester with epoxy primer powder coatings were used in this study. Moreover, the 3.5 wt.% of sodium chloride (3.5 wt.% of NaCl) test solution was used for electrochemical and salt spray test and the tools used to assess electrochemical properties were electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and neutral salt spray test (NSS). The microstructure of AlSi9Cu3 after corrosion exposure was investigated; also, the microstructure of coated and uncoated AlSi9Cu3 samples was analyzed by SEM microscopy after corrosion exposure. Besides, the electrochemical studies were also carried out on the Al alloy die casting. It was found that acrylic paint ED coatings exhibited higher corrosion resistance than 2-coat polyester without primer & 3-coat polyester with epoxy primer powder coatings. Acrylic paint ED coating showed higher corrosion resistance in AC and a lower value in DC and 3-coat polyester with epoxy primer powder coating displayed higher corrosion resistance in DC and a lower value in AC. View Full-Text
Keywords: coating; EIS and salt spray test; potentiodynamic polarization; NaCl solution; ultrasonic sensors coating; EIS and salt spray test; potentiodynamic polarization; NaCl solution; ultrasonic sensors
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MDPI and ACS Style

Hu, Y.-C.; Kumaran Selvaraj, S.; Subramanian, M.; Srinivasan, K.; Narayanan, S. Ultrasonic Sensors-Assisted Corrosion Studies on Surface Coated AlSi9Cu3 Alloy Die Castings. Coatings 2020, 10, 85. https://doi.org/10.3390/coatings10010085

AMA Style

Hu Y-C, Kumaran Selvaraj S, Subramanian M, Srinivasan K, Narayanan S. Ultrasonic Sensors-Assisted Corrosion Studies on Surface Coated AlSi9Cu3 Alloy Die Castings. Coatings. 2020; 10(1):85. https://doi.org/10.3390/coatings10010085

Chicago/Turabian Style

Hu, Yuh-Chung; Kumaran Selvaraj, Senthil; Subramanian, Manivannan; Srinivasan, Kathiravan; Narayanan, Srinivasan. 2020. "Ultrasonic Sensors-Assisted Corrosion Studies on Surface Coated AlSi9Cu3 Alloy Die Castings" Coatings 10, no. 1: 85. https://doi.org/10.3390/coatings10010085

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