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CrN on Steel

I am attempting Reactive Sputter deposition of CrN on Low Carbon Steel(1010/1020).Though my coating stays on the steel sample I have seen that it shows micro cracks. Does this mean the coating has failed?

If yes, is this because of internal stresses (as mentioned in one of the earlier queries). If Cleaning the Steel surface is an issue, what is the best/reliable way to to get a clean starting surface (the steel sample is galvanised to begin with)?

Pravahan Salunke
University of Cincinnati - Cincinnati, Ohio, USA
2006

You'll never be able to deposit a good coating on top of galvanized steel. Zinc is one of the worst metals to put in a vacuum chamber. It has an extremely high vapor pressure at even modest temperatures. I suggest you start with un-galvanized steel.

Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover
San Diego, California
2006

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