Chrome is typically a high concentration solution of chromic acid (CrO3 250g / L, H2SO42.5g / L) solution of the chromium plating. Chrome cathode current efficiency was poor (10% to 15%), the anode electrode lead is insoluble in the polar hydrogen and oxygen fast, easy to form a large number of harmful chromium mist escaping. This not only caused great waste, but a serious health hazard for the operator, but also make the machinery, equipment and other corrosion. Was added a small amount of chrome specialty surfactants chrome fog inhibitor, chrome that greatly reduces the surface tension of the liquid is suppressed generation of chromic acid mist. The most effective inhibitor is chrome fog fluorinated surfactant.
Currently chrome fog inhibitor of the production and application are mainly: F-53 chrome fog inhibitor (perfluoroalkyl polyoxyethylene potassium), FC-80 chrome fog inhibitor (perfluorooctane sulfonic acid potassium), ZM-830 non-fluorinated chromium-fog inhibitors. Chrome was added 0.04g/LF-53 chrome fog inhibitor, can inhibit the process of chrome-plated chrome fog escaping, compared with the use of exhaust and chrome fog machine recovery to chrome fog, can save about 30% chromic acid.
