Decorative chromium plating process for imitating stainless steel color
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A decorative chrome plating, imitation stainless steel technology, applied in organic chemistry and other directions, can solve the problem of low thickness of chrome layer, and achieve the effect of improving dispersibility, process stability, and appearance without white fog
Active Publication Date: 2022-04-29
厦门市金宝源实业有限公司
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However, the current trivalent chromium plating layer generally has a low thickness of chromium layer on the market.
Method used
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preparation example I-1
[0042] An amphoteric pyridinium ligand, prepared by the following method:
[0043] Sa, under nitrogen protection and constant stirring, add 3kg polyethylene glycol to 60kg acetonitrile, then add 5kg1,3,5-tribromomethyl-2,4,6-trimethylbenzene, 6kg ethyl isonicotinate Esters, heated up to 75°C, heat-preserved for 50 hours, filtered, and dried to obtain semi-finished products.
[0044] Sb. Under continuous stirring, add the semi-finished product to 50kg of hydrochloric acid solution, the mass concentration of the hydrochloric acid solution is 20%, heat up to 75°C, heat preservation for 20h, filter, and dry to obtain the amphoteric pyridinium ligand.
preparation example I-2
[0046] An amphoteric pyridinium ligand, the difference between it and Preparation Example I-1 is that the addition of 1,3,5-tribromomethyl-2,4,6-trimethylbenzene is 6kg, isofume The addition of ethyl acetate is 5kg.
preparation example I-3
[0048] An amphoteric pyridinium ligand, the difference between it and Preparation Example I-1 is that 1,3,5-tribromomethyl-2 is replaced with an equal amount of 1,3,5-tribromomethylbenzene, 4,6-Trimethylbenzene.
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Abstract
The invention relates to the technical field of chromium plating processing, and particularly discloses a stainless steel color-imitating decorative chromium plating process which comprises the following steps: S1, shielding parts except a to-be-chromium-plated area of an electroplated part, and carrying out wax removal, oil removal and water washing on the to-be-chromium-plated area of the electroplated part; s2, the electroplated part is put into a trivalent chromium electroplating solution to be electroplated; and S3, washing and drying the electroplated part, and then carrying out heat treatment to obtain a product, the trivalent chromium electroplating solution takes water as a solvent, and the trivalent chromium electroplating solution comprises the following solutes in terms of solute: chromium trichloride hexahydrate, an amphoteric pyridinium salt ligand, ethylenediaminetetraacetic acid, malic acid, conducting salt, a buffering agent, a wetting agent, N, N-dimethylformamide, diphenylcarbazide and ferric trichloride. A product obtained through the decorative chromium plating process is free of rime fog, yellowing and dark fringes in appearance, high in chromium electrodeposition rate, high in chromium layer thickness and high in chromium layer hardness, and the market requirement is met.
Description
technical field [0001] The application relates to the technical field of chrome-plating processing, and more specifically, it relates to a decorative chrome-plating process imitating stainless steel color. Background technique [0002] With the development of society and the improvement of people's living standards, the electroplating industry has also made rapid progress. In the electroplating industry, chrome plating occupies an extremely important position and is listed as one of the three major plating types. The chrome plating layer not only plays a decorative role, but also has good hardness, corrosion resistance and wear resistance. Chromium plating can be divided into hexavalent chromium plating and trivalent chromium plating. Because hexavalent chromium is highly toxic and can cause cancer, the traditional hexavalent chromium electroplating process has been gradually replaced and eliminated. Trivalent chromium electroplating not only solves the problem of hexavale...
Claims
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Application Information
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