Patent
Method of brightening electrodeposited chromium
TLDR
In this article, a method for brightening an electroplated chromium deposit was proposed, where the deposited chromium is contacted with a solution having a constituent capable of forming complexes with chromium hydroxide species and of detaching the complexes so formed from the surface of an Electroplated deposit.Abstract:
A method for brightening an electroplated chromium deposit wherein the deposited chromium is contacted with a solution having a constituent capable of forming complexes with chromium hydroxide species and of detaching the complexes so formed from the surface of an electroplated deposit. Preferably the solution is an alkaline ferricyanide solution or a solution of sodium dichromate in sulphuric acid.read more
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Electrodeposition of chromium from a trivalent electrolyte
TL;DR: In this paper, an electrodeposition process and a bath are described for hard smooth coatings of trivalent chromium, and the bath is maintained at a pH of 4.0 and a temperature of 35°C.
Patent
Process for etching chrome
TL;DR: An aqueous acidic composition suitable for etching which contains an acid and a thiourea compound, and use thereof is described in this paper, where it is shown how to obtain a suitable etch.
Patent
3 -- -- -- electroplating chromium alloys
TL;DR: In this paper, a trivalent chrome alloy plating solution is proposed to completely replace hexavalent chrome plating which is expected to be subject to an environment restriction as a cancer-causing agent.
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Patent
Alkaline desmutting composition for ferrous metals
TL;DR: An AQUEOUS ALKALINE FERRICYANIDE COMPOSITION is proposed in this article for removing smuts formed on the surface of FERFOUS METALS by common surface treatments such as picklining, clearing, cleaning, and etching.
Patent
Process for reducing discoloration of electrochemically treated chromium plated ferrous metal strip
TL;DR: In this paper, a solution of a water soluble hexavalent chromium compound prior to the electrochemical treatment of a chromium plated strip was proposed to reduce the coloration of a ferrous metal strip.
Patent
Electrolytic post-treating method of electrolytically chromate treated or metallic chromium plated steel sheet
TL;DR: In this article, anodically post-treating an electrolytically chromate treated or metallic chromium plated steel sheet in an electrolyte other than an aqueous solution is described.