DISCUSSION SECTION 361 reactions. For iron corroding in an acid, two electrochemical oxidation-reduction systems are operative. The first is the hydrogen ion-hydrogen gas system, while the second is the iron (metal)-iron ( ferrous) system. The possible oxidation reactions are (A) Fe (metal) ~ Fe ++ + 2e and (B) H~ --* 2H + + 2e. The possible reduction reactions are (C) Fe ++ + 2e --* Fe (metal) and (D) 2H + + 2e ~ H2.
A method for electrodeposition of protective titanium coatings on steel and other base metals is described. The procedure involves electrolysis of potassium titanium fluoride dissolved in alkali or alkaline earth halides under an inert atmosphere. Graphite or titanium metal anodes are employed.Adherent titanium coatings up to 0.005 in. (0.127 mm) thick are produced. Coatings are essentially pure titanium. Underlying the coating is a base metal-titanium alloy layer producing a firm metal-metal bond. Coatings so prepared possess the corrosion resistance of titanium metal. Layers heavier than 0.005 in. (0.127 ram) may be prepared by repeating the process.Equipment and materials used, conditions of operation, and properties of the electrodeposited titanium are described completely.
An electrolytic method for preparation of titanium metal from titanium monoxide is described. The process is carried out in alkaline earth halide melts under an inert atmosphere. The inert atmosphere cell and its operation are described. Methods for preparation of reduced titanium oxides are also discussed. These include reactions of titanium carbide with ZnO or MgO, carbon reduction of TIP2, and electrolytic reduction of TIP2. Electrolytic titanium prepared from TiP is deposited as a crystalline metal powder in a salt matrix and is recovered by aqueous techniques. Although metal so prepared has not generally been acceptable from a purity standpoint, revision in cell design and procedure could offer improvement in this respect.
Preparation of commercially pure titanium metal powder by electrolysis of K:~TiF~ in molten NaCI is described. The process is carried out under an inert atmosphere in an all-graphite cell. Operating conditions of the electrolysis and their effect upon the metal so produced are discussed. Preparation of the K2TiF~ and the electrolytic procedure are completely described. The process is capable of producing metal of high purity which may be consolidated and fabricated by standard techniques as applied to metal powders. The metal is recovered by aqueous washing techniques. It may be prepared either as coarsely crystalline metal or as coarse thin metal flakes.
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