Abstract: A composition that includes at least one alkali metal hydroxide, at least one alkali metal silicate, at least one alkali metal fluoride, and hydrogen peroxide. The invention also includes a method of applying an anodic coating on at least a portion of a surface of a magnesium-containing article that includes the steps of electrically connecting the article with a power source, absorbing a composition with an absorbent applicator, which is in contact with a cathode, supplying a voltage from the power source, and contacting the absorbent applicator with the article, wherein the composition comprises at least one alkali metal hydroxide, at least one alkali metal silicate, at least one alkali metal fluoride and hydrogen peroxide.