Electropolishing service

The process strips away burrs, microcracks and other imperfections to leave the workpiece smooth, clean and shiny. 

Commonly performed on stainless steel or similar alloys, electropolishing is ideal for deburring and polishing delicate components and items with complex geometries. It has a variety of applications but it’s especially useful in sectors where precision is key, for example, surgical equipment and automotive and aerospace parts.

The metal workpiece, which serves as the positively charged anode, is submerged in an electrolyte solution, along with a negative cathode. This temperature-controlled solution typically contains a mixture of sulphuric acid and phosphoric acid.

When the anode and cathode are connected to a DC supply, an electric current passes between the two. This causes metal ions on the surface of the workpiece to oxidise and dissolve into the electrolyte solution, eliminating burrs, roughness and other imperfections in the process.

The amount of metal removed from the surface depends on a variety of factors including: 

• The temperature of the electrolyte solution;
• The chemical composition of the electrolyte;
• The type of metal being treated;
• The length of time the workpiece is exposed to the current; and
• The density of the electrical current.

With more than 60 years of experience in the fabrication industry, Knees Engineering has built up a reputation for quality and professionalism.

Here are just some of the reasons why you should choose us to fulfil your metal finishing requirements: