Open-air plasma-assisted deposition of organosilicon coating for corrosion protection of AZ91D Mg alloy

As a corrosion barrier layer, open-air plasma-assisted organosilicon coating was applied on AZ91D Mg alloy. Organosilicon-coated AZ91D samples, prepared from two different plasma coating processes, were used for corrosion evaluation based on multistep electrochemical and H 2 collection measurements...

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Bibliographic Details
Published in:JCT research 2024-05, Vol.21 (3), p.1097-1111
Main Authors: Jun, Jiheon, Su, Yi-Feng, Wade, John E., Pappas, Daphne, Sy, Andrew, Robinson, Ryan, Lim, Yong Chae
Format: Article
Language:English
Subjects:
Air plasma
Barrier layers
Chemical analysis
Chemistry and Materials Science
corrosion
Corrosion and Coatings
Corrosion prevention
Corrosion rate
Industrial Chemistry/Chemical Engineering
magnesium alloy
Magnesium base alloys
MATERIALS SCIENCE
open-air plasma
organosilicon (silane) coating
Polymer Sciences
Protective coatings
Sodium chloride
Substrates
surface characterization
Surfaces and Interfaces
Thin Films
Tribology
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Summary:As a corrosion barrier layer, open-air plasma-assisted organosilicon coating was applied on AZ91D Mg alloy. Organosilicon-coated AZ91D samples, prepared from two different plasma coating processes, were used for corrosion evaluation based on multistep electrochemical and H 2 collection measurements in 3.5 wt% sodium chloride (NaCl) solution. Some coated AZ91D samples were characterized with and without corrosion exposure in NaCl solution using electron microscopies and X-ray chemical analysis techniques. The results indicate that the organosilicon coatings from open-air plasma processes are effective to delay the initiation of corrosion attack and also reduce the corrosion rate for AZ91D substrate. The corrosion attack was considered to develop after permeation of NaCl solution through the coating layer.
ISSN:1547-0091
1935-3804
2168-8028
DOI:10.1007/s11998-023-00876-2