sähkökiillotusta

Sähkökiillotus, also known as electro-polishing or electrochemical polishing, is a metal finishing process used to smooth, polish, and passivate metal surfaces. It involves immersing a metal object in an electrolytic solution and applying an electric current. The metal object acts as the anode, and another conductive material acts as the cathode. The electric current causes a controlled dissolution of the metal surface, preferentially removing microscopic high spots and leaving a smooth, bright, and reflective finish.

The process is particularly effective for stainless steel, but can also be used on other metals like aluminum, copper, and brass. Sähkökiillotus offers several advantages over mechanical polishing methods. It can reach complex shapes and intricate internal surfaces that are difficult to access mechanically. The resulting surface is not only aesthetically pleasing but also highly resistant to corrosion due to the formation of a passive oxide layer. This makes it ideal for applications in industries such as food and beverage processing, pharmaceuticals, medical devices, and aerospace where hygiene and resistance to contamination are critical.

The electrolytic solution typically contains a mixture of acids, such as phosphoric and sulfuric acids, with specific additives to control the polishing rate and surface finish. The temperature of the bath and the current density are important parameters that are carefully controlled to achieve the desired results. Sähkökiillotus is a non-contact process, meaning there is no mechanical stress applied to the metal, preserving its structural integrity. The smoothness achieved can significantly reduce friction and improve cleanability, making it a valuable finishing technique for demanding applications.