Corrosion resistant coatings

A coated substrate comprising:

• a substrate surface coated with a coating comprising at least one layer, wherein the at least one layer comprises titanium, aluminum and nitrogen, and
• a content of aluminum in relation to a content of titanium in the at least one layer comprising titanium, aluminum and nitrogen satisfies Al/Ti>1 by considering only respective concentrations in atomic percentage of aluminum and titanium in the at least one layer comprising titanium, aluminum and nitrogen, and
• the at least one layer comprising titanium, aluminum and nitrogen exhibits wurtzite phase of aluminum nitride, and
• the substrate is a part of a component or is a part of an article or is a component or is an article used in the aerospace or power generation industry, wherein the substrate material is stainless steel or a Ni-based, or Co-based or NiCo-based superalloy material.