Suiting up with Al-Mg-Si: New protective coating for steel to resist corrosion in ships and marine and coastal facilities and structures

One of the most common methods of improving the corrosion resistance of steel is coating it with other metals such as aluminum ( Al ). But the use of Al in marine applications is limited owing to its leaning to react with chloride ions in sea urine, leading to corrosion. The addition of other elements, such as magnesium ( Mg ) and silicon ( Si ), to form an alloyed coat is a promise way around this problem. But Mg can not be easily deposited as a coat using the conventional method acting of dipping the steel into a hot bathtub of metallic element salts .
In a late study published in Corrosion Science, scientists have developed a new protocol for Al-Mg-Si application of steel. “ When I served in the dark blue, I was constantly looking at rusting machinery. Since then, I have become in full engaged in research on how to produce better anti-corrosive steels, ” says Professor Myeong-Hoon Lee of the Korea National Maritime and Ocean University, who guided the study. This learn was made available on-line on September 9, 2021 and was published in volume 192 of the daybook in November 2021 .
In this analyze, the researchers took aluminized steel ( with Al and Si ) and then plated it with Mg using a technique called “ physical vaporization deposition. ” This was then followed by exposing the coating to a high temperature of 375° C. They then characterized the coat movie and performed corrosion testing in the phase of a “ salt spray test. ” They found that the corrosion products were besides formed in two layers : a open level made of chiefly Al-based corrosion products, and an inner corrosion layer made of Al-, Mg-, and Si- based products. furthermore, the inner layer of corrosion products produced a “ shield effect, ” which far improved their anti-corrosion properties .
“ Our research reveals how a highly corrosion-resistant steel can be produced using a childlike change in the surface treatment protocol. This makes it very meaningful for conserving energy and environmental resources, ” explains Prof. Lee.

This new protocol for enhance corrosion resistance in steel takes a bold but certain footstep towards a more sustainable future .

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Reference
Authors : Gi-DongPark1, Ji HoonYang2, Kyung-Hwang Lee2, Hyo-Jin Kim1, Seung-Hyo Lee3, Jun Kang1, Yong-Sup Yun1 and Myeong-Hoon Lee1
Affiliations :

1. Division of Marine System Engineering / Interdisciplinary Major of Maritime AI Convergence, Korea Maritime & Ocean University, Republic of Korea
2. Materials Performance Research Group, POSCO Steel Solution Research Lab., POSCO Global R&D Center, Republic of Korea
3. Division of Ocean Advanced Materials Convergence Engineering, Korea Maritime & Ocean University, Republic of Korea

department of the interior : hypertext transfer protocol : //doi.org/10.1016/j.corsci.2021.109829

About National Korea Maritime & Ocean University 

South Korea ’ s most prestigious university for maritime studies, transportation skill and engineer, the National Korea Maritime & Ocean University is located on an island in Busan. The university was established in 1945 and since then has merged with other universities to presently being the only post-secondary initiation that specializes in nautical sciences and engineering. It has four colleges that offer both undergraduate and graduate courses .
web site : hypertext transfer protocol : //www.kmou.ac.kr/english/main.do

About the author
Professor Myeong-Hoon Lee teaches at Korea Maritime and Ocean University and heads the Center of Surface Corrosion Control Engineering. His team not alone studies the causes of corrosion including its examination and evaluation but besides performs research in the areas of cathodic auspices, hot dipping plat, and plasma coat, etc. Prof. Lee has collaborated with inquiry institutes such as POSCO, LG, KEPRI, etc. in Korea on many studies on corrosion and surface discussion. He began teaching after gaining plain cognition at BV as a surveyor. He was awarded his ph by Nagoya University in Japan .

Journal

corrosion skill

DOI

10.1016/j.corsci.2021.109829

Method of Research

experimental cogitation

Subject of Research

not applicable

Article Title

Ultra-high corrosion resistance of Al-Mg-Si film on steel sheet formed by PVD Mg coating and estrus discussion

Article Publication Date

31-Oct-2021

COI Statement

Authors declare no dispute of interests

source : https://mindovermetal.org/en
Category : Maritime