Method of activating pickled surfaces and solution for carrying out said method
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Polymeric additive for zinc plating baths based on polyalkyleneimines, process for producing and using said additive, and aqueous alkaline, cyanide-free zinc bath containing said additive
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Flushing device for galvanically or chemically treated objects
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Sulphuric acid baths for high-lustre cadmium electroplating - contg. halogen component and nitrogen-contg. heterocyclic cpd.
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Work-basket for electroplating tank - has perforated base closed by plate in plating tank
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Process and bath for the prevention of deposits during the densification of anodic oxide layers
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Multiple rinsing process for electroplating plants - using progressively cleaner water from interconnected storage tanks
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Glossy silver electroplating baths - contg. a ketone-alkali hydroxide-carbon di:sulphide condensn. prod. and a naphthalene-sulphonic acid-formaldehyde! condensn. prod.
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Cyanide-free silver thiosulphate electroplating bath - contg. aromatic nitrogen-heterocyclic cpd. of high mol. wt., giving bright plating
