Advantages And Disadvantages Of Plastic Plating-trivalent Chromium Plating

Advantages and disadvantages of plastic plating-trivalent chromium plating.
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Trivalent chromium plating has obvious advantages compared with hexavalent chromium plating, especially good dispersing ability and uniform plating ability; high plating rate, which can be as fast as 0.2pm/min, thus shortening electroplating time; the current efficiency of trivalent chromium plating is also higher than that of hexavalent chromium plating, which can reach more than 25%; at the same time, plating faults such as coke are reduced; trivalent chromium plating is not affected by current interruptions or waveforms; special anodic diaphragm is not required. Do not use harmful hexavalent chromium without environmental pollution; trivalent chromium plating process also reduces the cost of sewage treatment; the safety of operators is also greatly improved.
Trivalent chromium plating has single-slot mode and double-slot mode, and the anode material in single-slot mode is graphite rods. Like ordinary electroplating, the double-trough method uses an inner anode slot in which the lead-tin alloy anode is placed in the inner tank. In addition, the basic solution of the anode uses dilute sulfuric acid as opposed to hexavalent chromium plating, which has the advantages of easy operation and safety. However, trivalent chromium plating also has the shortcomings of large equipment investment and high cost for the first time, and the chromaticity and corrosion resistance of trivalent chromium plating is not as good as that of hexavalent chromium plating. At the same time, the stability of trivalent chromium plating bath is also a problem, and more efforts should be made in management.