Manufacturing processes in the electroplating industry employ hazardous chemicals and generate hazardous waste, including hexavalent chromium compounds and heavy metal cyanides. We designed a reagent-based treatment technology that can remove these contaminants and is relatively simple to implement and maintain. The technology features low reagent consumption but high treatment efficiency and simplifies separating precipitates from the treated effluent. The paper presents a detailed description of how to neutralise electroplating shop wastewater. We propose a system of organizational and technological measures to improve chemical safety.

Chrome plating is widely used as a protective and decorative coating and to increase the wear resistance of measuring and cutting tools. To improve the properties of the chrome coating, nanosized particles are coprecipitated with it. Since nanodiamond particles possess the properties of diamond, that is, superhardness, low coefficient of friction, high thermal conductivity and chemical inertness, they are used precisely during deposition with chromium. This article presents a study of chromium-diamond coating. Determination of its wear resistance, microhardness, porosity and other indicators. The use of chromium-diamond coating allows to improve to a greater extent the physicomechanical indices of hard chromium plating, as well as to increase corrosion resistance and increase the service life of parts operating under conditions of corrosion wear.

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