Abstract: A device for rinsing batches of semiconductor wafers including a rinse vessel provided with at least one opening of overflowing water discharge, the bottom of which includes a water supply, a main outlet connected to a sewer and a recovery outlet connected to a waste water treatment plant, said at least one opening emerging into a gutter equipped with an outlet duct connected to the sewer and with a recovery duct connected to the treatment plant and said outlet duct being equipped with a controllable closing means enabling selection thereof to empty the gutter.

Abstract: This invention relates to a process for the preparation of a surface of a uranium and titanium alloy, and more specifically to etching the surface of said alloy for purposes of preparing said surface for nickel plating. More specifically, the process comprises chemically etching the surface of the uranium and titanium alloy with a solution comprising lithium chloride and hydrochloric acid. The process of this invention further provides for recovering the uranium dissolved in the etching solution and recycling said solution. The uranium is recovered from the etching solution by means of an ion exchange resin with the etching solution being recycled to the etching process.

Abstract: Process for the preparation of the surface of a uranium or uranium alloy part. It comprises a stage of chemically etching the surface of the uranium or uranium alloy part by means of a solution of nickel chloride and hydrochloric acid. The etching solution may also contain hydrofluoric acid.The nickel-coated uranium or uranium alloy parts can be used as shielding or ballasting members in a marine atmosphere.

Abstract: Apparatus for producing a metallic deposit of constant thickness of elongated metal revolution parts. It comprises a plate mounted in rotary manner and having a plurality of height-regulatable rods distributed round a circle, each rod having a bore able to receive a threaded end of a part to be treated, a cover mounted around each rod and sliding thereon between a top position and a bottom position, as well as means for connecting each rod to the negative terminal of a direct current source.