Innovative steel strip coatings by means of PVD in a continuous pilot line: process technology and coating development

Influence of magnesium content on the corrosion resistance of the cut-edges of Zn–Mg-coated steel

“…It is well known that the durability of the protection depends directly on the zinc coating thickness. However, for economic reasons there is a strong need to develop thinner coatings, using more environmentally friendly processes such as physical vapour deposition (PVD) [1][2][3][4]. Consequently, research efforts have focused on the development of novel compositions for sacrificial coatings, which would be more efficient than a pure zinc coating to protect the steel.…”

“…Consequently, research efforts have focused on the development of novel compositions for sacrificial coatings, which would be more efficient than a pure zinc coating to protect the steel. Alloying zinc with other elements such as magnesium and/or aluminium have been proposed in several studies [4][5][6][7][8] to improve corrosion resistance and self-healing properties of sacrificial coatings, both for automotive and roofing applications. This improvement of self-healing properties was observed on the cut-edge of the coated steel after different corrosion tests (cyclic corrosion tests, salt spray test, humid cabinet), and related to a decrease of the period before red rust precipitation and paint delamination.…”

Surface technology for automotive engineering

“…The Mg-layer shifts the electrochemical potential to more negative values and reduces the corrosion on steel [154,155,157]. This system should be applied for coil coating processes.…”

Microstructure and Corrosion Resistance of Zn-Mg Alloy Coatings

“…With enhanced corrosion resistance, ZnMg alloy coating has attracted worldwide attention for several decades. Steel factories in Japan [1][2][3][4][5][6][7] and Germany conducted lots of research on manufacturing process and corrosion performance of Zn-Mg alloy coatings. Research showed that Zn-Mg alloy coating not only has better corrosion resistance, but manufacturing process is more eco-friendly.…”