The present invention relates to an anti-microbial coating (10, 10', 10", 10"', 10") of a substrate (12), wherein the coating (10, 10", 10", 10'", 10") is obtained by applying the coating (10, 10', 10", 10", 10") to a surface (14) of the substrate by means of an electrostatic spray method, and wherein the coating contains at least one metal oxide and/or at least one metal salt. The present invention further relates to an electrostatic spray method for coating at least one substrate (12) with an anti-microbial coating (10, 10', 10", 10"', 10"). The present invention also relates to a use of a coating material to create an anti-microbial coating (10, 10', 10", 10"', 10") on a surface of a substrate (12), wherein the coating (10, 10', 10", 10'", 10") contains at least one metal oxide and/or at least one metal salt.
