초록 ▼

The Cr2O3 protective coating (3) is applied, during the vacuum spray process, as a leakproof coating to a support (1), and has a density of not more than 5.3 g/cm3, a residual porosity of less than 2%, a Vickers hardness (HV) of over 2000 kp/mmm2 and an electric strength of at least 5 V/m3) exposed

The Cr2O3 protective coating (3) is applied, during the vacuum spray process, as a leakproof coating to a support (1), and has a density of not more than 5.3 g/cm3, a residual porosity of less than 2%, a Vickers hardness (HV) of over 2000 kp/mmm2 and an electric strength of at least 5 V/m3) exposed to corrosion and simultaneously subjected to high mechanical loads.

대표청구항 ▼

An article comprising, in combination, a protective layer of Cr2O3 on a metal support applied by a vacuum plasma spray process, said support having a surface pre-treated by a transferred electric arc immediately prior to the application of said protective layer and wherein the Cr2O3 is conveyed in s

An article comprising, in combination, a protective layer of Cr2O3 on a metal support applied by a vacuum plasma spray process, said support having a surface pre-treated by a transferred electric arc immediately prior to the application of said protective layer and wherein the Cr2O3 is conveyed in said spray process in a plasma flame having a reducing atmosphere, said protective layer having a density almost corresponding to the density of chromium oxide as a solid material, a residual porosity of less than 2%, a Vickers hardness of more than 2000 kp/mm2 (HV), and being substantially free of imbedded metallic phases.