Stainless steel is widely used because of its high corrosion resistance and decorative properties,

especially in medical equipment, food industry appliances, tableware, kitchen utensils and other aspects.

Stainless steel appliances should be resistant to corrosion, the smooth and shiny appearance, clean, utensils surface should not be attached harmful substances.

Therefore, it is necessary to completely remove the harmful substances of surface.

After hot processing or mechanical processing, the surface of stainless steel will form a black oxide layer,

that will affect stainless steel appearance and performance, so taking appropriate measures to remove the black oxide layer is needed.

Here mainly describes two useful methods: the passivation and electrolytic polishing process

Passivation process:

Pretreatment – De-oiling – Cleaning – Deoxidation Layer – Cleaning – Passivation – Cleaning – Drying

Electrolytic polishing process:

Electrolytic polishing – cleaning – rinsing – air drying – passivation