Abstract: A coated cast iron substrate including a coating including nanographites and a binder being sodium silicate, wherein the cast iron substrate has a composition, in weight percent, including from 2.0 to 6.67% C and including optionally one or more of the following elements: Mn?3 wt %, Si?5 wt %, Mo?2 wt %, Cu?2.5 wt %, Ni?2 wt %, Cr?3 wt %, V?0.5 wt %, Zr?0.3 wt %, Bi?0.01 wt %, Mg?0.1 wt %, Ce?wt %, the remainder of the composition being made of iron and inevitable impurities resulting from the elaboration. A method for the manufacture of this coated cast iron substrate is also provided.

Abstract: A coated stainless-steel substrate including a coating including nanographites and a binder being sodium silicate, wherein the stainless-steel substrate has the following composition in weight percent: C?1.2%, Cr?11.0%, Ni?8.0% and on a purely optional basis, one or more elements such as Nb?6.0%, B?1.0%, Ti?3.0%, Cu?5.0%, Co?3.0%, N?1.0%, V?3.0%, Si?4.0%, Mn?5.0%, P?0.5%, S?0.5%, Mo?6.0%, Ce?1.0%, the remainder of the composition being made of iron and inevitable impurities resulting from the elaboration. A method for the manufacture of this coated stainless-steel substrate is also provided.