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Efficient gravure chromeplating additive

An additive and gravure technology, which is applied in the field of high-efficiency gravure chrome plating additives, can solve the problems of low current efficiency, high power consumption, corrosion of plated parts, etc., and achieve high current efficiency, fast deposition speed, bright and smooth coating

Inactive Publication Date: 2013-03-13
ZHENGZHOU DAYOU PLATEMAKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a high-efficiency gravure chrome plating additive, which can effectively solve the problems of low current efficiency, high power consumption and corrosion of plated parts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The present invention is made from 12kg of 1,5-naphthalene disulfonic acid sodium salt, 8kg of potassium iodide, 9kg of sodium methylene bis-naphthalenesulfonate, 0.4kg of sulfuric acid, 0.25kg of alcohol, 0.4kg of chromic anhydride and 25kg of purified water. During preparation, In purified water at a temperature of 35°C, add 1,5-naphthalene disulfonic acid sodium salt, stir until dissolved, add potassium iodide, stir until dissolved, add sodium methylene bis-naphthalene sulfonate and stir for 0.15 hours, add sulfuric acid and stir well, Then add alcohol and stir evenly, then add chromic anhydride and stir evenly.

Embodiment 2

[0013] The present invention is made from 15kg of 1,5-naphthalene disulfonic acid sodium salt, 10kg of potassium iodide, 12kg of sodium methylene bis-naphthalenesulfonate, 0.5kg of sulfuric acid, 0.3kg of alcohol, 0.5kg of chromic anhydride and 31.7kg of purified water. , in purified water at a temperature of 40°C, add 1,5-naphthalene disulfonic acid sodium salt, stir until dissolved, add potassium iodide, stir until dissolved, add sodium methylene bis-naphthalene sulfonate and stir for 0.2 hours, add sulfuric acid and stir well , then add alcohol and stir evenly, then add chromic anhydride and stir evenly.

Embodiment 3

[0015] The present invention is made from 18 kg of 1,5-naphthalene disulfonic acid sodium salt, 12 kg of potassium iodide, 15 kg of sodium methylene bis-naphthalene sulfonate, 0.6 kg of sulfuric acid, 0.35 kg of alcohol, 0.6 kg of chromic anhydride and 39 kg of purified water. , in purified water at a temperature of 45°C, add 1,5-naphthalene disulfonic acid sodium salt, stir until dissolved, add potassium iodide, stir until dissolved, add sodium methylene bis-naphthalene sulfonate and stir for 0.25 hours, add sulfuric acid and stir well , then add alcohol and stir evenly, then add chromic anhydride and stir evenly.

[0016] The additive of the present invention is an innovation to improve the product quality of gravure plate rollers in the domestic and international packaging and printing industries. The disadvantage of the traditional chrome plating process is that the current efficiency is low, which can only reach 8-10%. In the process, about 87% of the electric energy is w...

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Abstract

The invention relates to an efficient gravure chromeplating additive, which effectively solves the problems that the current efficiency is low, the electric energy consumption is high and a plated piece is corroded. The efficient gravure chromeplating additive is prepared from 12-18kg of 1,5-naphthalene sulfonic acid sodium salt, 8-12kg of potassium iodide, 9-15kg of methylene sodium binaphthalene sulfonate, 0.4-0.6kg of sulfuric acid, 0.25-0.35kg of alcohol, 0.4-0.6kg of chromic anhydride and 25-39kg of purified water. The efficient gravure chromeplating additive is prepared by the steps of: adding 1,5-naphthalene sulfonic acid sodium salt into the purified water; agitating till 1,5-naphthalene sulfonic acid sodium salt is dissolved; adding potassium iodide; agitating till potassium iodide is dissolved; adding and agitating sodium methylene binaphthalene sulfonate; adding and agitating alcohol till the alcohol is dissolved; and adding and agitating chromic anhydride till the chromic anhydride is dissolved. The efficient gravure chromeplating additive provided by the invention has a very good effect, and the chromeplating solution with the additive is high in current efficiency, great in deposition velocity, free from fluorides and does not corrode the plated piece and the lead plate of the anode, so that the electroplating quality is ensured.

Description

technical field [0001] The invention relates to additives, in particular to a high-efficiency gravure chrome-plating additive (also known as HIGH-05 high-efficiency chrome-plating additive). Background technique [0002] For twenty years, sulfuric acid has been used as a chromium plating catalyst and industrialized. This standard chromium plating process has been used until now. However, the current efficiency of the chromium plating process is low, and the highest cathode current efficiency is only about 13%, that is, about 87% of the electric energy is wasted in the chromium plating process. In order to overcome this disadvantage, a second-generation catalyst-fluoride was developed in the late 1940s, and a so-called "composite chromium plating" solution appeared. Both hardness and hardness have been improved; but this chrome plating solution will cause corrosion of plated parts and anode lead plates at low currents, and the chrome plating solution is more sensitive to imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/04
Inventor 吕智强水晔李小平
Owner ZHENGZHOU DAYOU PLATEMAKING CO LTD
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