The Effect of Surface Roughness and Composition on Wetting and Corrosion of Al−Si Alloys

This paper presents results of wetting and corrosion of cast Al−Si alloys with composition varying from 7–50 wt% Si in contact with water. The dependency of the wetting angle and corrosion properties on the alloy composition, surface roughness, size of water droplets, and microstructure were studied...

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Bibliographic Details
Published in:Israel journal of chemistry 2020-05, Vol.60 (5-6), p.577-585
Main Authors: Behera, Swaroop K, Suri, Shvetashva, Salowitz, Nathan P., Nosonovsky, Michael, Rohatgi, Pradeep K.
Format: Article
Language:English
Subjects:
Alloy development
Aluminium-Silicon alloys
Composition
Contact angle
Corrosion
Corrosion effects
Corrosion resistance
Corrosion resistant alloys
droplet size
Droplets
roughness
Silicon base alloys
Surface roughness
Surface roughness effects
Water drops
Wetting
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Summary:This paper presents results of wetting and corrosion of cast Al−Si alloys with composition varying from 7–50 wt% Si in contact with water. The dependency of the wetting angle and corrosion properties on the alloy composition, surface roughness, size of water droplets, and microstructure were studied. An increase in the Silicon content reduced the water contact angle (WCA) while an increase in the roughness and/or droplet size increased the WCA. No systematic variation in corrosion was found due to change in the Silicon content. The results are of interest for the development of lightweight (Al−Si) alloys with non‐wetting and corrosion‐resistant properties.
ISSN:0021-2148
1869-5868
DOI:10.1002/ijch.201900149