Coated Metal Laser Marking: Paint, Anodized and Coating Removal Techniques
Coated metal laser marking enables high-contrast and permanent marking on metal parts whose surfaces are protected with paint, anodized coating (anodic oxide), phosphate, or different industrial coatings. In this application, the laser often creates the marking not by directly processing the metal itself, but by controlled removal of the coating layer. Fiber laser and, in some cases, MOPA fiber laser technologies provide the best results on coated surfaces. This guide explains laser marking techniques on coated metal surfaces, coating removal methods, and industrial applications in detail.
Coated Metal Laser Marking Technology
What is coated metal?
Coated metals are metal parts covered with different coating layers to protect the surface or for aesthetic purposes.
Types of coatings
Common coating types include paint, anodized coating, galvanized coating, and phosphate coating.
Use of fiber laser
Fiber laser systems provide high precision in coating removal applications.
Advantage of MOPA laser
MOPA laser systems can perform coating removal more precisely thanks to pulse control.
Coating removal method
The laser reveals the metal surface underneath by vaporizing the coating layer.
Contrast formation
When the coating is removed, high contrast is created between the underlying metal and the top surface.
Risk of surface damage
Incorrect parameter usage may cause damage to the metal surface.
Marking precision
Fiber and MOPA laser systems provide high precision.
QR code and DataMatrix
2D code marking can be performed on coated surfaces with laser.
Industrial application areas
- Automotive parts
- Electronic enclosures
- Metal labels
- Industrial equipment
Coated Metal Marking Applications
Marking on painted surfaces
On painted metal surfaces, the laser performs marking by removing the coating.
Anodized surfaces
High-contrast marking can be performed on anodized aluminum.
Galvanized surfaces
Controlled marking can be performed on galvanized coatings.
Metal labels
Coated labels are marked permanently with laser.
Inline production
Fiber laser systems can work integrated into production lines.
Camera verification
The readability of the codes is checked with camera systems.
Automation integration
Integration with PLC and MES systems can be provided.
Parameter optimization
Laser power and speed settings should be determined according to coating thickness.
Sample testing process
Test studies should be carried out for each coating type.
Industrial advantages
Laser marking is a permanent, high-contrast, and contactless solution.
Can coated metal be marked with laser?
Yes, it is possible with a fiber laser.
What is coating removal?
It is the process of laser marking by removing the surface coating.
Can marking be done on a painted surface?
Yes, the laser performs marking by removing the coating.
Can anodized aluminum be marked?
Yes, high contrast can be achieved.
Is MOPA laser necessary?
It provides advantages in precision applications.
Is the marking permanent?
Yes, it is generally permanent.
Can it be used in inline production?
Yes, it can work integrated with automation.
Can camera verification be performed?
Yes, code verification can be performed.
Does surface damage occur?
It may occur with incorrect parameters.
Are sample tests necessary?
Yes, they are recommended for the best results.
