Abstract: A method is provided for corrosion-proofing substrates made of materials containing cobalt, nickel and/or iron, in which cracking in the material and in a corrosion-proofing layer can be avoided. For this purpose, a slurry containing aluminium is applied to a substrate and the substrate, together with the applied slurry, is then subjected to a brief annealing of the surface layer at reduced temperature. Due to the heating of the surface layer of the substrate and of the slurry during the annealing of the surface layer, an exothermic reaction between the aluminium and the substrate metal takes place on the surface of the substrate, so that aluminide phases are formed which produce an aluminide diffusion layer on the substrate. Above this layer remains a residual layer of unused slurry.

Abstract: The invention relates to a method for coating a substrate with a metal or a metallic compound. According to said method, a metallo-organic parent compound and a substrate to be coated are introduced into a receptacle. Before the coating process, an organic solubilizer for the metal-organic parent compound is applied to the substrate. The receptacle containing the substrate and the metallo-organic parent compound is placed in an oven for approximately two hours at a temperature of 300° C. In this way, the desired coating is obtained.

Abstract: In the separation of traces of halogens and sulfur from a halogen- and/or sulfur-containing gas stream wherein the gas stream is contacted with a wash liquid to absorb the halogens and sulfur, the improvement which comprises including in the wash liquid heavy metal ions capable of forming difficultly soluble halides and sulfides. Preferably the heavy metal ions are silver or copper, and the insoluble heavy metal sulfide and/or halide is removed from the wash liquid which is recirculated. Almost quantitative removal is achieved in as little as 1 second of gas-wash liquid contact.

Abstract: Equipment for testing materials for the effects of stress corrosion cracking, which includes more than two tensioning units, each consisting of a base plate, two guide bars, an upper and a lower cross-beam, a locking system for the guide of the lower cross-beam and a connecting flange between the cross-beam and a threaded bar for causing elongation of a test sample. The power drive supply block drives the threaded bar. A motor power unit is included in the power drive supply block and vertically-slippable gearing is inserted between the motor gearing and the block. The motor power unit consists of two stepping motors driving sun gears. The sun gears drive planetary gears which, by means of an arm, drive the drive shaft operatively associated with the threaded bar. In particular, the invention relates to equipment with six tensioning units comprising an automatic limit switch-off means and a lift system in the power drive supply block for separating the drive gears from the rest of the system.

Abstract: An electrochemical cell is disclosed for eliminating and/or recovering dissolved metals from waste liquors or winning dissolved metals from waste solutions having a low concentration of such metals. The cell has a three dimensional electrode with a geometrical bed depth that is increased from the electrolyte inlet to outlet so that the bed depth increases along the flow direction corresponding to the concentration decrease within the cell. Thus, the geometrical bed depth is essentially equal to the effective bed depth at each point within the electrode where the electrochemical conversion takes place.