https://patents.google.com/patent/RU2094546C1/en

Dear Saba,

In truth I am not sure if this procedure led always to a complete stripping of the coating. Certainly this solution will provide a partial oxidation of TiN to TiOxNy but I expect that coating thickness and microstructure (porosity, grain size, compactness) could play a role on the kinetic of the removal from the surface. BR. Simone

dear Simone Vezzù

thanks a lot for your response. the mentioned solution dissolved the TiN pvd coat in one minute which made me really concern about the quality of the coat. thanks again for your help

dear Vadim Verlotski

thanks for sending the link.