Inhibition method for chromium fog generated in chrome plating production

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...