Hello,
Background: High pressure die casted (material AlSi8Cu3(Fe)) parts are in contact with steam (water, nothing else). These parts are turning grey/dark grey in 15 minutes. Before they are in contact with steam they are campletely clean and shiny.
Questions: What is hapenning at surfaces of these parts? What is this grey material/phase? Is it possible this grey material not to appear at the surface of these high pressure die casting parts.
I really appreciate if someone have got some answers to my questions. Thank You.
Ville Koskenniska ville . koskenniska tut . fi