Abstract: A system for adjusting and fixing sheet-shaped elements for railings including containment means for a protective sheet-shaped element which are provided with a channel for housing the sheet-shaped element and adjusting means for adjusting the position of the sheet-shaped element, wherein the adjusting means include at least one resting and retaining element with substantially L-shaped cross-section provided with seats for the passage of two pins and with two planes for the sliding of adjusting elements, in such a way that the combination of the movements of the adjusting elements caused by the pins generates a rotation of the resting and retaining element which in turn causes a rotation of the sheet-shaped element.

Abstract: A system for adjusting and fixing sheet-shaped elements for railings including containment means for a protective sheet-shaped element which are provided with a channel for housing the sheet-shaped element and adjusting means for adjusting the position of the sheet-shaped element, wherein the adjusting means include at least one resting and retaining element with substantially L-shaped cross-section provided with seats for the passage of two pins and with two planes for the sliding of adjusting elements, in such a way that the combination of the movements of the adjusting elements caused by the pins generates a rotation of the resting and retaining element which in turn causes a rotation of the sheet-shaped element.

Abstract: An electrode for electroplating or electrodeposition of a metal and to the method for obtaining the same is provided. The electrode has a conductive substrate, at least one layer of an electrochemically active coating placed on the substrate, and at least one topcoating layer of valve metal.

Abstract: The invention relates to a coating for providing protection against interstitial corrosion for titanium surfaces such as flanges or other equipment used in highly aggressive electrolytic environments, for example hydrochloric acid electrolysis cells. The coating according to the invention comprises a passivating layer, on which a film of water-repellent material is applied. The invention further relates to a method for providing anticorrosive protection for flanges of electrochemical cells.

Abstract: The invention relates to a coating for providing protection against interstitial corrosion for titanium surfaces such as flanges or other equipment used in highly aggressive electrolytic environments, for example hydrochloric acid electrolysis cells. The coating according to the invention comprises a passivating layer, on which a film of water-repellent material is applied. The invention further relates to a method for providing anticorrosive protection for flanges of electrochemical cells.

Abstract: The invention relates to a catalytic coating of surfaces of valve metals, for example titanium, suitable for operation in highly aggressive electrolytic environments such as electrolysis cells of hydrochloric acid. The coating may be used as catalytic activation of electrodes, for example for anodic evolution of chlorine, or for protection from crevice corrosion of flanges and other elements of electrolysers subject to stagnation of liquid.

Abstract: The invention relates to a method to produce steel from a ferrous material, by using one furnace divided into, at least, two vessels which are connected to each other at least by ducts for the off-gases and ducts for the melted metal.

Abstract: A method of determining nitrogen in various nitrogenous materials, wherein the materials are combusted by being brought into contact with a solid metallic catalytic mass, in the presence of an oxygenated gas, so as to convert the nitrogen into NO. This is then determined, preferably by chemiluminescence or by optical interferometry. The method is improved by adding a halide of an alkali metal or an alkaline earth metal to the materials prior to combustion.An apparatus comprising an oven (1,2,2') charged with catalytic mass (4), which can be a wire acting as a heating element, and provided with an oxygen inlet (6). The catalytic mass is a non-oxidizable ferrous alloy or a metal of the Pt group.

Abstract: A process for the preparation of reactive dyes of the formula ##STR1## in which D, R and Z are as defined in greater detail in the description, which comprises subjecting 2,4,6-trifluoro-s-triazine to a condensation reaction in a strongly acid solution and in the presence of an alkali metal fluoride with an amine of the formulaH--Z (3)and then subjecting the primary condensation product obtained to a condensation reaction with an amino dye of the formula ##STR2## affords reactive dyes of the formula (1) in a high yield and a high state of purity.

Abstract: Process for producing compounds of the formula ##STR1## wherein R is hydrogen, methyl or ethyl, and n is 1 or 2, which process comprises condensing aminohydroxynaphthalenesulphonic acids of the formula ##STR2## with 2,4,6-trifluoro-s-triazine, in an aqueous solution or suspension, within a pH range which is defined bypK.sub.N(R)H .ltoreq.pH.ltoreq.(pK.sub.OH -2)wherein pK.sub.N(R)H and pK.sub.OH are the pK values respectively of the amino group and hydroxyl group of the aminohydroxynaphthalenesulphonic acid and pH is the hydrogen exponent, to give compounds of the formula (1).

Abstract: The present invention relates to a process for the manufacture of 1:2 chromium complexes of metallisable azo dyes, wherein the azo dyes are treated in aqueous solution at pH 7 to 9 with at least the stoichiometric amount of a chromium complex, and, in the course of the chroming, the reaction medium is acidified once or repeatedly to a pH of 6 or less and subsequently brought back again to pH 7 to 9.