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The Effect of Surface Roughness and Composition on Wetting and Corrosion of Al−Si Alloys
Author(s) -
Behera Swaroop K,
Suri Shvetashva,
Salowitz Nathan P.,
Nosonovsky Michael,
Rohatgi Pradeep K.
Publication year - 2020
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201900149
Subject(s) - wetting , corrosion , contact angle , alloy , surface roughness , metallurgy , silicon , surface finish , microstructure , chemistry , composite material , materials science
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.