Abstract: A method for making a microcavity in an enamel layer is disclosed. For this purpose, a layer of a carbon-based material with the dimensions of the microcavity to be obtained is provided. This layer is coated with an enamel except in a limited zone. The unit is heated to high temperature so as to cause combustion of the carbon-based material. The combustion gases escape through the reduced zone.

Abstract: A method of photodegrading a metallic chelate complex wherein ultraviolet light is directed into an aqueous solution of a metallic chelate to photodegrade the metallic chelate and isolate the metallic portion. The ultraviolet light has a wavelength of no greater than about 210 nm and the method is especially adapted for photodegrading metallic chelates in electroless nickel plating baths and metallic ethylenediamine triacetic acid to recover the metallic portions as well as reduce toxic waste.

Abstract: A method is disclosed for measuring the remaining useful life of an ester-based lubricant containing at least one antioxidant species. A lubricant sample is mixed with a solvent, an organic base and an electrolyte to produce an analysis sample. The analysis sample is placed into an electrolytic cell and subjected to a cyclic voltammetric analysis, whereby a varying electric current is produced within the cell. The current during the cyclic voltammetric analysis is measured and recorded. Remaining useful life for the lubricant is then determined from the average maximum reduction current wave height produced.