Metal Fabrication Laser Cleaning Applications
Technical parameters for laser cleaning in metal fabrication including weld preparation, mill scale removal, rust elimination, and coating stripping for carbon steel, stainless steel, aluminum, and specialty alloys.
Pre-Weld Surface Preparation
Welding requires oxide-free, contaminant-free joint surfaces. Laser cleaning removes 25-100 micron mill scale and 0.5-2 micron oxide layers in one pass, achieving AWS D1.1 and D17.1 surface finish requirements without the 50-150 micron material loss of grinding or abrasive blasting.
Post-Weld Heat Tint & Oxide Removal
Stainless steel welds develop heat tint and chromium-depleted oxides (1-10 microns thick). Laser cleaning removes these layers, restoring full corrosion resistance (passive chromium oxide layer) without wire brushing which embeds 5-15 micron iron particles causing pitting corrosion.
Mill Scale & Rust Removal from Structural Steel
Hot-rolled steel plate and structural shapes carry 50-200 micron mill scale. Laser removal achieves Bare-metal cleanliness (near-white metal) surface finish without abrasive media disposal ($50-150 per ton) or chemical inhibitors, meeting SSPC-SP10/NACE No. 2 standards.
Aluminum Oxide & Contaminant Removal
Aluminum forms a 2-5 micron native oxide layer within hours. Laser cleaning removes oxide and cutting fluids before welding, achieving 0.5-1 micron surface roughness (Ra (surface roughness)) and eliminating weld porosity (5-15% reduction vs mechanical cleaning) in 5xxx and 6xxx series alloys.