A coating is only as reliable as the surface beneath it. Most coating failures are preparation failures, which makes preparation the part of the process worth improving.
Laser ablation removes corrosion, oxidation, existing coatings, oils and residues from suitable substrates before a coating is applied. It is a preparation method, and like every preparation method it has to be judged against the coating manufacturer specification for the system being applied.
That last point is the one that gets skated over in laser marketing, and it matters. Coating systems are qualified against a defined surface condition, often including a required cleanliness standard and sometimes a surface profile. A tool that produces a clean surface has satisfied part of that requirement, not necessarily all of it.
If your coating data sheet calls for a specific abrasive blast standard and surface profile, laser cleaning to a visually clean surface does not automatically satisfy it. Some systems require a mechanical key that ablation does not by itself produce. Others are perfectly happy with a clean, dry, contaminant-free surface. It varies by product, and the data sheet is the authority.
Where this leaves most operations is a hybrid: laser to remove the coating and contamination cleanly and without media, then whatever the specification requires to establish the profile. That is still a substantial change to the process, particularly where containment or media disposal is the current bottleneck.
Applications
The sectors where preparation cost is a line item worth attacking.
Which machine
Preparation is usually an area problem, which pushes most enquiries toward the 500W. Detail and component work stays with the 300W.
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Further reading
Standards and guidance
A pulsed fibre laser is a Class 4 device. These are the primary UK sources, linked so you can read them rather than take our word for it.
Common questions
Visual cleanliness and abrasive blast standards are not the same measurement, and a laser does not produce a blast profile by definition. Some coating systems accept a laser-prepared surface, some require a mechanical profile. Check the data sheet for your specific product and, if in doubt, ask the coating manufacturer directly.
The process is dry, so there is no water to drive flash rusting the way a wet blast does. Bare steel will still oxidise in a humid shop, so the usual practice of coating within a sensible window applies.
Light oils and processing residues, yes. Heavy contamination is better degreased first so the laser is doing the job it is good at rather than burning off a film.
Application enquiry
Tell us what you are trying to remove and what is underneath it. We will tell you honestly whether a laser is the right tool, where it would sit in your existing process, and which machine would suit. If conventional preparation is the better answer for your job, we will say so.
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