LASER PROCESS

Laser Cleaning: How It Works, Applications and Machines

Laser cleaning is a high speed non-contact process that removes rust, paint, oxide, oil and residue by vaporising it with laser pulses. The contaminant needs much less laser energy to be removed than the metal underneath, so the laser removes the layer and leaves the surface undamaged.

Want to see results on your own parts? How Laser cleaning Works

Process Overview

How Laser cleaning works

Laser cleaning removes rust, paint, oxide, oil and other unwanted layers from a surface using a focused laser beam. The beam delivers enough energy to vaporize the contaminant but not enough to remove the base material underneath, so the part is cleaned without chemicals, abrasives or contact. A small laser spot is swept rapidly across the surface by scanning mirrors to clean larger areas.

URSA : Fiber Laser Cleaning Machine That Integrates With Your Production Line.

URSA is a standalone fiber laser cleaning machine from Markolaser, built to remove rust, paint, oxides, oil and coatings quickly and precisely across mixed materials and part sizes. Intelligent process control delivers consistent cleaning results with minimal operator intervention, without chemicals, abrasives or damage to the base material, keeping your cost per part low.

Choose from 50W to 3 KW laser source options to match the power to your application, from selective oxide removal and decoating on precision parts to heavy rust and paint removal. Optimised cleaning parameters get the most from each power level, so you use less energy across steel, stainless steel, aluminium, brass and copper.

URSA is designed for surface pre-treatment before coating and bonding, pre- and post-weld cleaning, mould cleaning and degreasing, and rust and paint removal. It integrates easily with the existing machines on your factory floor and can be linked to upstream and downstream processes.

Typical Power Ranges for Rust Removal

Rust Severity	Recommended Power	Laser Type	Typical Use Cases
Thin oxide	20-100 W	Pulsed	small parts, selective de coating
Light surface rust / thin oxide	100–300 W	Pulsed	Precision parts, molds, tools, thin sheet, delicate surfaces
Medium rust	200–500 W pulsed or 1,000–1,500 W CW	Pulsed or CW	General shop work, automotive parts, moderate rust layers
Heavy rust / thick scale	1,000–3,000 W	Mostly CW (or high-power pulsed)	Structural steel, shipbuilding, heavy equipment, large areas
Very heavy / high-volume industrial	2,000–6,000 W+	CW	Ship hulls, bridges, pipelines, continuous production

Industrial Applications

Before processing

Surface preparation

Clean surface before coating or bonding

Paints, adhesives and coatings only bond well to a clean surface. Laser cleaning removes oils, release agents and thin oxide films immediately before coating or bonding, giving a consistent, repeatable surface on every part.

Typical uses: adhesive bonding of metal parts, pre-painting preparation, pre-plating cleaning, composite bonding.

Pre- and post-weld cleaning

Clean joints before welding, seams after

Before welding, laser cleaning removes oil, oxide and coatings from the joint area so the weld is free from porosity and contamination. After welding, it removes the discoloration and oxide left on and around the seam without grinding.

Typical uses: stainless steel and aluminium fabrication, battery and EV component welding, pressure vessels, food-grade equipment.

Oxide removal and selective de coating

Clean only the area needed, no masking

The laser can remove oxide or coating from only the area that needs it, such as an electrical contact point, a grounding pad or a weld zone. This avoids the time and cost of masking the rest of the part, and makes it easy to rework incorrectly coated parts.

Typical uses: grounding and contact points, rework of coated parts, heat-treatment scale, partial decoating of anodized or painted surfaces.

Maintenance and repair

Rust and paint removal

Down to bare metal, even in recesses

The laser removes rust, old paint and powder coating down to bare metal, including on curved surfaces, edges and recesses that are hard to reach with grinding or blasting. It works equally well for single repair jobs and for automated cleaning on a production line.

Typical uses: machine parts, steel structures, vehicle parts, pipes and fittings, refurbishment of used equipment.

Mould cleaning

Residue off, mould texture preserved

Rubber, plastic and die-casting moulds build up residue that is slow to remove by hand and often needs dry-ice blasting or chemicals. Laser cleaning removes these deposits without abrasive wear, so the mould’s texture and dimensions are preserved and downtime is kept short.

Typical uses: tyre moulds, rubber and plastic injection moulds, die-casting dies, food-processing moulds.

Restoration and refurbishment

Corrosion off, original details intact

Because the laser removes only the unwanted layer, it can clean delicate or historically valuable surfaces with a level of control that blasting and chemicals can’t match. It removes corrosion, soot and old coatings from metal without harming the original surface.

Typical uses: heritage metalwork, statues, old coin, vintage machinery and vehicle restoration.

Functional surfaces

Surface texturing

Controlled roughness for better grip

The same laser control used for cleaning can also create a deliberate surface texture, with a defined roughness or pattern. This helps coatings, adhesives or overmoulded plastics grip a metal part better, or changes its appearance or friction.

Typical uses: roughening for adhesive bonding, texturing before overmoulding, functional and decorative surface patterns.

Marking on coated surfaces

Remove coating to reveal codes and text

On painted, anodized or coated parts, the laser can remove the top layer in a precise pattern to reveal the material underneath. This creates permanent, high-contrast text, logos, serial numbers and 2D codes for identification and traceability.

Typical uses: serial numbers and 2D codes on coated parts, control panels and keypads, anodized aluminium components.

Industries

Automotive and EV

Tyre and rubber

Tool, die and mould

Aerospace and defence

Railways and shipbuilding

Power and heavy engineering

Electronics and electrical

Frequently Asked Questions

1 Why choose laser cleaning over sandblasting

Ans: Laser cleaning offers clear advantages over traditional sandblasting for precision applications. Unlike sandblasting, which requires continuous grit replacement and abrades the base material, laser cleaning uses only electricity as a consumable and leaves the base material unharmed when parameters are set correctly. It provides high selectivity by cleaning only the programmed area, generates minimal waste in the form of easily captured fume, and integrates easily with CNC, robotic, or in-line automation. Operator safety is also improved through laser-safe enclosures or eyewear combined with fume extraction, avoiding the silica dust and full PPE demands of sandblasting. While sandblasting can still be faster for very large, rough steel surfaces where base-metal damage is acceptable, laser cleaning delivers superior quality, lower running costs, and better process control for precision parts, moulds, and production lines.

2 Why choose Markolaser for cleaning machines?

Ans: Markolaser laser cleaning machines deliver precise, non-contact surface cleaning without damaging the base material. Key advantages include easy automation with CNC or robotic integration, improved operator safety through enclosed systems and fume extraction, and significantly lower long-term running costs. Markolaser systems are especially suited for precision parts, moulds, production lines, and applications where surface integrity and process consistency are critical. Book a laser cleaning trial.

3 What materials can be laser cleaned?

Ans: Steel, stainless steel, aluminium, copper, cast iron, titanium, stone, concrete, glass and many plastics and composites. Results depend on the contaminant and substrate, so we test on your sample first.

4 Is laser cleaning better than dry ice blasting?

Ans: Laser cleaning has no ongoing consumable cost, while dry ice must be bought and stored continuously. Laser is also more Sampling form selective and easier to integrate in-line; dry ice can suit large, irregular equipment cleaned occasionally.

5 Pulsed or continuous-wave laser - which should I choose?

Ans: Choose pulsed for precision work, moulds, thin or heat-sensitive parts and pre-weld cleaning. Choose CW for heavy rust on large steel structures where some heat and surface darkening are acceptable.

6 Which laser power do I need for rust removal?

Ans: It depends on rust thickness, area per hour and laser type. A 100–300 W pulsed system is usually enough for light rust, moulds and precision parts; heavy rust on large areas often needs a higher-power system. A sample trial gives you a measured cleaning rate.

7 How much does a laser cleaning machine cost in India?

Ans: Prices depend on laser type, power and automation level. Contact us for a quotation based on your parts.

8 Why is laser cleaning used before welding EV battery tabs and busbars?

Ans: It removes oxides, oils and residue that cause weak or inconsistent welds. A clean, uniform surface improves weld strength and conductivity and reduces rejects.

9 Is laser cleaning safe?

Ans: Yes, with the right controls. Enclosed Class 1 workstations need no special eyewear; open handheld or robotic systems need laser-safety glasses, a controlled area and fume extraction. See our laser safety guide.

10 Can laser cleaning be automated?

Ans: Yes. The cleaning head can be mounted on a robot, gantry or conveyor line and controlled by your PLC. Markolaser builds complete automated systems, including part handling and vision alignment.

11 Can I test laser cleaning on my parts before buying?

Ans: Yes. Send us your sample and we'll clean it in our applications lab and share the results. Sampling form

12 Which industries use laser cleaning the most?

Ans: Automotive, EV battery, mould and die, aerospace, electronics and heavy fabrication are the biggest users of laser cleaning. Automotive and EV makers use it to clean parts and battery tabs before welding or painting. Tyre and injection-mould shops use it to remove residue without taking moulds offline. Aerospace and electronics need it to strip coatings and oxides without damaging the base material, and fabricators use it for rust and weld-seam cleaning. It is also used in shipbuilding, railways and heritage restoration. Ready to Upgrade Your Cleaning Process?

13 What can laser cleaning remove?

Ans: Laser cleaning can remove rust, mill scale, oxides, paint, powder coatings, oil, grease, release agents, carbon deposits and weld discoloration. It can also prepare surfaces before welding, bonding or coating by removing thin contaminant films.

14 Does laser cleaning damage the base metal?

Ans: No, when the laser is set up correctly. Contaminants usually need much less laser energy to be removed than the metal underneath. The laser is tuned to work between these two levels, so the coating or rust is removed while the base metal stays below its own removal threshold.

15 What type of laser is used for laser cleaning?

Ans: Pulsed fiber lasers are the most common choice because their short, high-energy pulses remove contaminants with minimal heat reaching the base material. Continuous-wave fiber lasers are sometimes used for heavy rust or large areas where speed matters more than surface finish.

Meet Markolaser family of other standard laser marking machines.

Last updated : Nov, 2026