Trivalent chromium electroplate liquid and preparing method thereof
An electroplating solution and trivalent chromium technology, applied in the field of electrochemistry, can solve the problems of strict electroplating operation requirements, uncontinuous thickening of the coating layer, and narrow range of process parameters, achieving a wide range of current density, a simple preparation method, and a stable plating solution. good effect
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Embodiment 1~4 3
[0023] The proportioning of embodiment 1~4 trivalent chromium electroplating solution
[0024]
[0025] The compositions and proportioning ratios of the trivalent chromium electroplating solutions of the four embodiments are shown in the above table.
[0026] The preparation steps of the electroplating solution of above-mentioned four embodiments are as follows:
[0027] a. According to the ratio in the above table, dissolve chromium trichloride hexahydrate in distilled water or pure water, stir until dissolved to obtain chromium trichloride hexahydrate solution; dissolve glycine in 55°C or 60°C or 70°C or Distilled water at 75°C, stirred until dissolved to obtain glycine solution;
[0028] b. Mix the hexahydrate chromium trichloride solution with the aminoacetic acid solution, add complexing agent; because the trivalent chromium aqueous solution generally exists stably in the form of hexahydrate complexes, the complex substitution reaction between it and the complexing ag...
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