What is Burnishing?

Burnishing is a critical finishing process in metalworking that enhances the durability and aesthetic appeal of electroplated articles. This technique involves the physical polishing of electro deposits, which are typically composed of numerous small crystals. These crystals, while forming a cohesive layer, leave minute intervals between them, resulting in a surface that reflects light in multiple directions. Through burnishing, the deposited metal is not only smoothed but also compacted into the pores of the underlying metal, significantly hardening the surface.

The Process and Its Impact

The primary goal of burnishing is to increase the wear resistance of the electroplated layer. By mechanically polishing the surface, burnishers effectively force the deposited metal into any existing pores, thereby eliminating surface irregularities and enhancing the bond between the electro deposit and the substrate metal. This post-deposition treatment is crucial for ensuring that the final product can withstand physical wear and tear over time.

Enhanced Durability

The impact of burnishing on electroplated articles is profound. It has been observed that burnished items, particularly those plated with precious metals like silver, exhibit a significantly longer lifespan compared to their non-burnished counterparts. In fact, with an equal amount of deposited silver, a burnished article can last twice as long as one that has not undergone this finishing process. This increased durability makes burnishing an invaluable step in the production of high-quality, electroplated items.

Conclusion

Burnishing not only improves the physical properties of electroplated articles but also contributes to their aesthetic quality by producing a smoother and more uniform surface. This enhancement in both durability and appearance underscores the importance of burnishing in the field of metalworking, ensuring that electroplated items can meet the demands of both form and function.

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