1. What is a laser engraving machine?

A laser engraving machine is equipment that uses laser technology for engraving or cutting. It can perform fine engraving on various materials such as wood, acrylic, metal, and leather, and achieves high-precision designs and processing through computer control. This technology is widely applied in handicraft production, personalized gifts, logo engraving, and industrial manufacturing.

2. Why does stainless steel rust after laser engraving?

The possible reasons include:

1. Damage to the protective layer: Stainless steel’s corrosion resistance comes from its chromium oxide film. The laser engraving process may damage this protective layer, exposing the metal to air and causing oxidation and rust.
2. Residual contaminants: If the surface is not properly cleaned after engraving, residual oil, dust, or acidic/alkaline substances may react with the metal surface and accelerate corrosion.
3. Electrochemical corrosion: Tiny metal particles or contaminants produced during engraving may trigger electrochemical reactions in humid environments, leading to localized rust.
4. Environmental factors: Exposure to high humidity or corrosive gases such as salt spray or acidic air can accelerate rusting.

3. How to prevent stainless steel from rusting after laser engraving?

Solutions include:

• Applying appropriate surface treatments after engraving, such as passivation or protective coatings.
• Regular cleaning and maintenance to avoid residual contaminants.
• Choosing stainless steel with higher corrosion resistance grades, such as 304 or 316, to improve rust resistance.

4. How to treat rust on stainless steel?

Rust can be removed using the following methods:

1. Citric acid: Apply lemon juice to the rusted area, or dissolve citric acid powder in water, let it sit, then scrub.
2. White vinegar: The acetic acid in vinegar reacts with iron oxide to remove rust stains.
3. Carbonated drinks: Carbonic acid in soft drinks can help remove rust, though less effectively.
4. Aluminum foil: Crumpled aluminum foil rubbed against the rusted surface can achieve some rust removal.
5. Nano cleaning cream: Use nano abrasive particles to remove rust stains and polish the surface, suitable for stainless steel, faucets, and similar items.

5. What is passivation surface treatment?

Passivation is a metal surface treatment technique designed to enhance corrosion resistance and prevent oxidation and rust. The process typically uses chemical methods to remove contaminants from the metal surface and form a protective oxide film, making the metal more durable.

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