Influence of Heat Treatment on Corrosion Resistance of Sn/Mg Films Formed by PVD Method on Hot-Dip Galvanized Steel

Double layers composed of Sn and Mg, each 0.8 μm thick, were fabricated on a hot-dip galvanized steel (8.4 μm) sheet using DC magnetron sputtering and post-annealing processes. With an increase in temperature, the surface morphologies were agglomerated with each other. Additionally, Sn/Mg mixture si...

Full description

Saved in:
Bibliographic Details
Published inCoatings (Basel) Vol. 13; no. 1; p. 196
Main Authors Hwang, Sung-Hwa, Lee, Seung-Hyo, Lee, Myeong-Hoon
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2023
Subjects
Corrosion currents
Corrosion resistance
Corrosion tests
Galvanized steel
Galvanized steels
Heat
Heat treatment
Hot dip galvanizing
Intermetallic compounds
Magnetron sputtering
Methods
Phase transitions
Salt spray tests
Thin films
Japan
Online AccessGet full text

Cover

More Information
Summary:Double layers composed of Sn and Mg, each 0.8 μm thick, were fabricated on a hot-dip galvanized steel (8.4 μm) sheet using DC magnetron sputtering and post-annealing processes. With an increase in temperature, the surface morphologies were agglomerated with each other. Additionally, Sn/Mg mixture sites, including an intermetallic compound of Mg2Sn, were formed at 190 °C and locally clustered at 220 °C. In the salt-spray test, the corrosion resistance of the Sn/Mg film prepared at 190 °C was 960 h, which is longer than that at non-heat for 528 h or 220 °C for 480 h. In the polarization test, the Sn/Mg film formed at 190 °C displayed a lower corrosion current density of 1.07 μA/cm2 and potential of 1.62 V/SSCE than those at non-heat or 220 °C.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13010196