Abstract

The current anticorrosion strategy makes use of coatings to passively protect the steel, which faces increasing challenge due to the tightened environmental regulations and high cost. This paper reports a new method for achieving a super anticorrosion function in Al-Si alloys through Mg nano-metallurgy, which was characterized by real-time synchrotron measurements. The unique function is based on the formation of an amorphous and self-charge-compensated MgAl2O4-SiO2 phase between the grain boundaries to help prevent the penetration of oxygen species through the grain boundaries. Through this, the corrosion resistance of pristine aluminized steel could be improved almost 20 fold. An analysis of the phases, microstructures of the Mg-coated aluminized layer and corrosion products consistently supported the proposed mechanism. This charge-compensated corrosion resistance mechanism provides novel insight into corrosion resistance.

Details

Title
Super anticorrosion of aluminized steel by a controlled Mg supply
Author
Jae In Jeong 1 ; Yang, Ji Hoon 1 ; Jung, Jae Hun 1 ; Kyung Hwang Lee 1 ; Hye Jeong Kim 1 ; Jung, Yong Hwa 2 ; Kim, Tae Yeob 2 ; Lee, Myeong Hoon 3 ; Hwang, Sung Hwa 3 ; Wu, Ping 4 ; Jae-Hun, Kim 5 ; Kim, Sang Sub 5 

 Materials Solution Research Group, Research Institute of Industrial Science & Technology, Pohang, Republic of Korea 
 Posco Smart Coating Technology-Dry Coating Project Dept., POSCO Gwangyang Research Lab., Gwangyang, Republic of Korea 
 Division of Marine Engineering, Korea Maritime & Ocean University, Busan, Republic of Korea 
 Entropic Interface Group, Singapore University of Technology & Design, Singapore, Singapore 
 Department of Materials Science and Engineering, Inha University, Incheon, Republic of Korea 
Pages
1-11
Publication year
2018
Publication date
Feb 2018
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2009220089
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.