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

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 c...

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Bibliographic Details
Main Authors: Yuh-Chung Hu, Senthil Kumaran Selvaraj, Manivannan Subramanian, Kathiravan Srinivasan, Srinivasan Narayanan
Format: Article
Language:English
Published: MDPI AG 2020-01-01
Series:Coatings
Subjects:
Online Access:https://www.mdpi.com/2079-6412/10/1/85
Description
Summary: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 (AlSi<sub>9</sub>Cu<sub>3</sub>) that is produced through the gravity die casting process. Further, the degradation of surface coating on die-casted AlSi<sub>9</sub>Cu<sub>3</sub> 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 AlSi<sub>9</sub>Cu<sub>3</sub> after corrosion exposure was investigated; also, the microstructure of coated and uncoated AlSi<sub>9</sub>Cu<sub>3</sub> 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 &amp; 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.
ISSN:2079-6412