A method for producing a corrosion resistant metal substrate and corrosion resistant metal substrate provided thereby. The method involves forming a plated substrate including a metal substrate provided with a nickel layer or with a nickel and cobalt layer followed by electrodepositing a molybdenum oxide layer from an aqueous solution onto the plated substrate, which is subsequently subjected to an annealing step in a reducing atmosphere to reduce the molybdenum oxide in the molybdenum oxide layer to molybdenum metal in a reduction annealing step and to form a diffusion layer which contains nickel and molybdenum, and optionally cobalt.

A method for producing a corrosion resistant metal substrate and corrosion resistant metal substrate provided thereby. The method involves forming a plated substrate including a metal substrate provided with a nickel layer or with a nickel and cobalt layer followed by electrodepositing a molybdenum oxide layer from an aqueous solution onto the plated substrate, which is subsequently subjected to an annealing step in a reducing atmosphere to reduce the molybdenum oxide in the molybdenum oxide layer to molybdenum metal in a reduction annealing step and to form a diffusion layer which contains nickel and molybdenum, and optionally cobalt.

A roughened plated sheet including a roughened plated layer having a roughened nickel plated layer and a zinc plated layer formed on at least one surface of a metal substrate in this order from the metal substrate side, wherein a ten-point average roughness RZ.sub.jis of a surface of the roughened plated layer, according to laser microscope measurement, is 3 m or more, an adhesion amount of the roughened nickel plated layer is 0.4 to 14.0 g/m.sup.2, and an adhesion amount of the zinc plated layer is 3 g/m.sup.2 or more.

Disclosed are methods of anodizing a metal component. In the methods an anodization bath includes an organic acid.

A method for manufacturing rotogravure cylinders with a cylinder base made of aluminum. The method involves the coating of the cylinder surface with high velocity spraying, the copper plating in an appropriate solution, the engraving of the cylinder, and the hardening of the cylinder by chromium plating. The spraying process is accomplished by High-Velocity Air-Fuel or High-Velocity Oxygen-Fuel thermal spraying which leads to less surface porosity, better adhesion of the copper substrate and better dimensional accuracy.

A method for manufacturing rotogravure cylinders with a cylinder base made of aluminum. The method involves the coating of the cylinder surface with high velocity spraying, the copper plating in an appropriate solution, the engraving of the cylinder, and the hardening of the cylinder by chromium plating. The spraying process is accomplished by High-Velocity Air-Fuel or High-Velocity Oxygen-Fuel thermal spraying which leads to less surface porosity, better adhesion of the copper substrate and better dimensional accuracy.

In example implementations, a method for producing a thin film coating is provided. The method includes pre-treating a substrate, placing the substrate in a bath comprising at least phosphoric acid and sulphuric acid to produce a thin anodized layer, rinsing the thin anodized layer in a solution, plating a surface of the thin anodized layer in an electro deposition bath following a plating current profile for a predetermined period, and increasing the plating current to the recommended bath plating current to produce the thin film coating having a desired initial coating thickness.

In example implementations, a method for producing a thin film coating is provided. The method includes pre-treating a substrate, placing the substrate in a bath comprising at least phosphoric acid and sulphuric acid to produce a thin anodized layer, rinsing the thin anodized layer in a solution, plating a surface of the thin anodized layer in an electro deposition bath following a plating current profile for a predetermined period, and increasing the plating current to the recommended bath plating current to produce the thin film coating having a desired initial coating thickness.

Non-cosmetic quality aluminum substrates are given a cosmetic finish by applying a PVD coating to the substrate. An enclosure for an electronic device can include an aluminum substrate including a 6000 series aluminum or 7000 series aluminum, a PVD coating disposed on the substrate, and a protective underlayer disposed between the aluminum substrate and the PVD coating.

Non-cosmetic quality aluminum substrates are given a cosmetic finish by applying a PVD coating to the substrate. An enclosure for an electronic device can include an aluminum substrate including a 6000 series aluminum or 7000 series aluminum, a PVD coating disposed on the substrate, and a protective underlayer disposed between the aluminum substrate and the PVD coating.