Development of an alternative process to conventional toxic chromic acid anodization (CAA) with equivalent corrosion resistance is a challenging task. The present invention provides a chromate free process for the manufacture of corrosion resistant sealed anodized coating for long term corrosion resistance of aerospace grade aluminum alloy. This method includes the steps of cleaning, chemical etching, anodizing in Tartaric-Sulphuric acid electrolyte followed by dipping the specimen in the sealing bath containing at least two water soluble either Mn and Mo or Mn and V oxyanions as corrosion inhibitors and a sufficient amount of alkali metal ion based nitrates at a temperature range between 60 and 80° C. for about 20 to 40 minutes at a pH range of 7 to 9. The sealed anodic coatings developed from this invention showed improved corrosion resistance in neutral 5% NaCl fog environment for greater than 2000 h of exposure. The sealed anodic coatings developed by this invention also showed self-healing protection in NaCl environment.

Development of an alternative process to conventional toxic chromic acid anodization (CAA) with equivalent corrosion resistance is a challenging task. The present invention provides a chromate free process for the manufacture of corrosion resistant sealed anodized coating for long term corrosion resistance of aerospace grade aluminum alloy. This method includes the steps of cleaning, chemical etching, anodizing in Tartaric-Sulphuric acid electrolyte followed by dipping the specimen in the sealing bath containing at least two water soluble either Mn and Mo or Mn and V oxyanions as corrosion inhibitors and a sufficient amount of alkali metal ion based nitrates at a temperature range between 60 and 80° C. for about 20 to 40 minutes at a pH range of 7 to 9. The sealed anodic coatings developed from this invention showed improved corrosion resistance in neutral 5% NaCl fog environment for greater than 2000 h of exposure. The sealed anodic coatings developed by this invention also showed self-healing protection in NaCl environment.

An object of the present invention is to provide an aluminum plate which is excellent in terms of both step suitability and working characteristics and a collector for a storage device using the same. The aluminum plate of the present invention is an aluminum plate having a plurality of through-holes formed in a thickness direction, in which a thickness of the aluminum plate is 40 μm or less, an average opening diameter of the through-holes is 0.1 to 100 μm, an average opening ratio by the through-holes is 2% to 30%, a content of Fe is 0.03% by mass or more, and a ratio of the content of Fe to a content of Si is 1.0 or more.

An object of the present invention is to provide an aluminum plate which is excellent in terms of both step suitability and working characteristics and a collector for a storage device using the same. The aluminum plate of the present invention is an aluminum plate having a plurality of through-holes formed in a thickness direction, in which a thickness of the aluminum plate is 40 μm or less, an average opening diameter of the through-holes is 0.1 to 100 μm, an average opening ratio by the through-holes is 2% to 30%, a content of Fe is 0.03% by mass or more, and a ratio of the content of Fe to a content of Si is 1.0 or more.

This application relates to a part for a portable electronic device. The part includes a titanium alloy substrate including a network of branching channels. The branching channels include a first channel and a second channel, where the first channel is defined by a first channel wall that extends away from a first opening in the exterior surface, and the second channel is defined by a second channel wall that extends away from a second opening in the first channel wall.

A chemical etch is performed on a sheet of material. An electrochemical etch is performed on the sheet of material after the chemical etch is performed on the sheet of material. A capacitor is fabricated such that an electrode included in the capacitor includes material from the sheet of material after the electrochemical etch was performed on the sheet of material. In some instances, the chemical etch included at least partially immersing the sheet of material in an etch bath that includes molybdenum. Additionally or alternately, the chemical etch can be performed for a period of time less than 60 s.

A chemical etch is performed on a sheet of material. An electrochemical etch is performed on the sheet of material after the chemical etch is performed on the sheet of material. A capacitor is fabricated such that an electrode included in the capacitor includes material from the sheet of material after the electrochemical etch was performed on the sheet of material. In some instances, the chemical etch included at least partially immersing the sheet of material in an etch bath that includes molybdenum. Additionally or alternately, the chemical etch can be performed for a period of time less than 60 s.

A capacitor and a method of processing an anode metal foil are presented. The method includes electrochemically etching the metal foil to form a plurality of tunnels. Next, the etched metal foil is disposed within a widening solution to widen the plurality of tunnels. Exposed surfaces of the etched metal foil are then oxidized. The method includes removing a section of the etched metal foil, where the section of the etched metal foil includes exposed metal along an edge. The section of the etched metal foil is placed into a bath comprising water to form a hydration layer over the exposed metal on the section of the etched metal foil. The method also includes assembling the section of the etched metal foil having the hydration layer as an anode within a capacitor.

A method for forming holes to form holes in a surface of a metal part includes: putting the metal part into a first solution as an anode; applying a first voltage on the metal part to form the first holes in a surface of the metal part; and cleaning and drying the metal part with the first holes. The first solution comprises a first organic solvent, chloride, and a phosphoric acid compound. The disclosure also provides a metal product and a metal composite.

A method for forming holes to form holes in a surface of a metal part includes: putting the metal part into a first solution as an anode; applying a first voltage on the metal part to form the first holes in a surface of the metal part; and cleaning and drying the metal part with the first holes. The first solution comprises a first organic solvent, chloride, and a phosphoric acid compound. The disclosure also provides a metal product and a metal composite.