Ready to explore trivalent plating? Please submit your email below, and a member of our team will reach out to begin your free consultation. Notice: JavaScript is required for this content. Want to talk to a member of our team now? Call Columbia Chemical at today to discuss how we can help you today! Many end-users have changed their zinc plating specification requirements in favor of the trivalent passivation process due to the imposed limitations on the number of hexavalent chromium compounds.
Corrosion test numbers are significantly better for trivalent passivates over zinc than hexavalent chromium over zinc. Electrodeposits of zinc nickel represents the highest level of performance even after deposit post-forming and heating. This means that the current end-user specification requirements can still be achieved with this formula change.
For the finisher using trivalent chromate passivation, the coating needs to be applied at elevated temperatures C , even so, this process remains relatively easy to operate. As evidenced by its increasing adoption, trivalent passivates as an intermediate stage is an ideal alternative to hexavalent chromium. We offer many plating methods for various industries and offer the best available technology while reducing excessive costs. When Great Lakes Metal Finishing uses trivalent passivates and applies it to a zinc alloy, it can achieve suitable or superior corrosion protection when compared to hexavalent chromium passivation.
Hexavalent Chromate Vs. Trivalent Passivate for Zinc Plating Feb 16, Why Hexavalent Chromium Has Been Used in the Past Hexavalent chromium is remarkably versatile and exhibits many desirable and essential characteristics through numerous metal treatment processes such as zinc electroplating. Why GLMF Primarily Uses Trivalent Chromate for Zinc Plated Parts Many end-users have changed their zinc plating specification requirements in favor of the trivalent passivation process due to the imposed limitations on the number of hexavalent chromium compounds.
At this point you can fill the tank with water then acidify to operating pH and use the applicable wetting agent to be used for the process to leach all new equipment. Make up a new plating bath as directed by the manufacturer and turn on the properly prepared ion exchange. Run your initial lab tests, begin plating and scale up accordingly. Although there is an initial time and cost investment involved in the conversion from hexavalent chromium to trivalent chromium, the benefits quickly and increasingly overcome the drawbacks.
Improved production efficiency, decrease in rejects, substantial savings in wastewater treatment and improvements in employee safety are among the key advantages. Once the transition has been made, many shops quickly realize the positive impact to their operations. Mark Schario is executive vice president at Columbia Chemical. Visit columbiachemical. Liquid Chrome Vs. Chromic Acid Flake. Sizing Heating and Cooling Coils Why is it important for you to know this?
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