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Inhibition method for chromium fog generated in chrome plating production

A technology of chromium mist inhibitor and preparation method, which is applied to cells, electrolysis process, electrolysis components, etc., can solve the problems of polluting the environment, endangering human health, wasting chromic acid, etc., and achieving the effects of reducing pollution, convenient operation, and preventing volatilization

Inactive Publication Date: 2015-01-28
SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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  • Description
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AI Technical Summary

Problems solved by technology

Chromium mist in the air will adhere to various dusts and fall on the ground and crops. This not only wastes chromic acid, but also pollutes the environment and endangers human health. How to suppress the generation of chromium mist during the chrome plating process to improve the environment, Reducing consumption has always been an urgent problem to be solved in the electroplating industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] First use more than 100 times of boiling water to dissolve the chromium mist inhibitor perfluorohexyl ether sulfonate potassium or perfluorooctane sulfonate through stirring, and then prepare a 10g / L chromium mist inhibitor solution. Then add 0.2-0.4mL of chromium mist inhibitor solution per 1L of chromium plating electrolyte to the chromium plating electrolyte preheated to 50°C, so that the dosage of chromium mist inhibitor is 2-4mg / L, and then carry out chrome plating after fully stirring electrolysis.

Embodiment 2

[0015] Embodiment two: inhibition effect

[0016] Using the method for inhibiting chromium mist in chromium plating production according to the present invention, a certain chromium plating electrolytic solution is treated, and its inhibitory effect is measured, and the inhibitory effect is shown in Table-1.

[0017] Table-1 Inhibition effect

[0018] .

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PUM

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Abstract

The invention relates to an inhibition method for chromium fog generated in chrome plating production and belongs to the field of environmental protection treatment methods. The inhibition method for chromium fog generated in chrome plating production comprises the following steps: preparing a chrome fog inhibitor into a certain concentration of chromium fog inhibitor solution, adding the chromium fog inhibitor solution to a chrome plating electrolyte which is preheated to 50 DEG C, fully stirring and then carrying out chrome plating electrolysis. According to the inhibition method for chromium fog generated in chrome plating production, a 2-4mg / L of fluorine-containing surfactant, namely, potassium perfluorohexyl ethyl ether sulfonate or potassium perfluorooctyl sulfonate is added into the chrome plating electrolyte in an appropriate addition manner so that a stable foam layer can be formed, the volatilization of chrome fog is prevented and the environmental pollution is reduced and the good practical effect is achieved when the inhibition method is applied in actual production. The inhibition method has the advantages of simple process, convenience in operation, low cost, good inhibition effect and the like.

Description

technical field [0001] The invention relates to a method for suppressing chromium mist in chrome plating production, and belongs to the field of environmental protection treatment methods. Background technique [0002] Electroplating is to cover the metal surface with a thin layer of metal electrochemically, so that the deposited metal and the base metal can be firmly combined, so as to achieve the purpose of rust prevention, wear resistance, size repair and decoration. Its essence is to oxidize the metal to be plated to ions at the anode and reduce it to atoms at the cathode to deposit on the surface of the workpiece through electron transfer. Generally speaking, the anode is soluble. However, chrome plating is different from other electroplating, the anode is an insoluble lead-antimony alloy, and the cathode efficiency is very low, generally only 13%-15%. Therefore, in addition to reducing metal chromium on the cathode, a large amount of hydrogen is precipitated at the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D21/14C25D21/04
Inventor 陆强
Owner SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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