Hexavalent chromium (immersion) - sewing machine

In the field of sewing machines, hexavalent chromium (immersion) mainly involves the surface treatment of sewing machine parts and the like. The following is a related introduction:

Properties and characteristics of hexavalent chromium

Hexavalent chromium is a high-valent compound of chromium with strong oxidizing properties. Common hexavalent chromium compounds include potassium dichromate and sodium dichromate, which are usually well soluble in water and have bright solutions, such as orange-red potassium dichromate solution.

Application in sewing machine parts processing

Anti-corrosion: By soaking some metal parts of the sewing machine in a solution containing hexavalent chromium, a dense chromate conversion film can be formed on the surface of the parts. This film can isolate the metal from air, moisture, etc., effectively preventing the metal from oxidizing, thereby preventing rust and corrosion and extending the service life of sewing machine parts. For example, after the metal parts of the sewing machine such as the needle bar and shuttle bed are soaked in hexavalent chromium, they can maintain good performance in long-term use and reduce failures caused by rust.

Enhanced wear resistance: The surface conversion film treated with hexavalent chromium not only has anti-rust function, but also can improve the hardness and wear resistance of the parts surface to a certain extent. During the operation of the sewing machine, friction and collision will frequently occur between the parts. The parts treated with hexavalent chromium can better withstand such friction, reduce wear, ensure the normal operation of the sewing machine, and reduce the maintenance frequency and cost.