The invention relates to a method for providing a metallic surface with a coating by applying one or more layers of one or more metal-containing slips to the surface. At least one of the slips comprises a coloring and/or color-imparting substance which has no influence on the properties of the completed coating and/or can be decomposed by thermal treatment, and the local thickness of the applied slip layer is determined on the basis of the local color intensity of the layer.

A method of applying a protective coating to an article comprises the steps of a) depositing aluminum in a surface region of an article, and b) depositing chromium is the surface region of the article subsequent to step a), whereby at least a portion of the chromium replaces at least a portion of the aluminum. Another method and an article are also disclosed.

A method of applying a protective coating to an article comprises the steps of a) depositing aluminum in a surface region of an article, and b) depositing chromium is the surface region of the article subsequent to step a), whereby at least a portion of the chromium replaces at least a portion of the aluminum. Another method and an article are also disclosed.

Reactive coating processes are provided that can include providing a coating material, reacting the coating material to form a shell about the coating material, contacting the shelled coating material with a substrate to be coated, depositing the coating material from within the shelled coating material on the substrate, and removing the shells from the substrate. Coating materials may be deposited upon a substrate to be coated and reacted to form a shell about the coating material. The coating materials can be particles and a shell can be formed about each of the individual particles.

Reactive coating processes are provided that can include providing a coating material, reacting the coating material to form a shell about the coating material, contacting the shelled coating material with a substrate to be coated, depositing the coating material from within the shelled coating material on the substrate, and removing the shells from the substrate. Coating materials may be deposited upon a substrate to be coated and reacted to form a shell about the coating material. The coating materials can be particles and a shell can be formed about each of the individual particles.

The invention relates to a steel component comprising a steel substrate having an anticorrosion coating present at least on one side of the steel substrate. This anticorrosion coating comprises a manganese-containing alloy layer. The manganese-containing alloy layer here forms the closest alloy layer of the anticorrosion coating to the surface. Moreover the manganese-containing alloy layer comprises iron and a further metal.

The invention relates to a steel component comprising a steel substrate having an anticorrosion coating present at least on one side of the steel substrate. This anticorrosion coating comprises a manganese-containing alloy layer. The manganese-containing alloy layer here forms the closest alloy layer of the anticorrosion coating to the surface. Moreover the manganese-containing alloy layer comprises iron and a further metal.

The invention relates to a method for coating a component, which is provided for the hot gas duct of a turbomachine, wherein the coating material is applied onto the uncoated component surface in the form of particles in mixture with a binding agent, and the component with the particle-treated binding agent thereupon then undergoes thermal treatment in such a way that the binding agent is released and the coating material remains on the component.

A nickel-plated heat-treated steel sheet for a battery can, having a nickel layer with a nickel amount of 4.4 to 26.7 g/m.sup.2 on a steel sheet. When the Fe intensity and the Ni intensity are continuously measured along the depth direction from the surface of the nickel-plated heat-treated steel sheet for a battery can, by using a high frequency glow discharge optical emission spectrometric analyzer, the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is less than 0.04 m.

An airfoil surface includes a first titanium portion, a second titanium portion, an aluminum alloy braze disposed there between, and a titanium coating covering the aluminum alloy braze, at least part of the first titanium portion and at least part of the second titanium portion.