CNC Router 3 Axis 1420

CNC Router 3 Axis 1420 Laser Engraving Stainless Steel Leads to Corrosion

Laser engraving stainless steel removes an important protective layer. In fact, any method that digs markings on the surface (deep or shallow) will remove this layer. This thin protective layer is composed of chromium oxide. Chromium oxide is formed naturally when chromium reacts with oxygen. This process is a desired form of oxidation known as passivation. The resulting layer prevents corrosion by stopping oxygen from reaching the underlying steel.

When that layer is removed, oxygen causes a chemical reaction on the bare steel. That reaction is known as oxidation. The result is rust, which creates weak spots that gradually destroy the material. That’s what happens when you mark stainless steel by laser engraving or laser etching.

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