This guide describes the use of portable or stationary Q-switched pulsed laser ablation (PLA) systems, consisting of directed energy technology for the surface preparation of ferrous substrates as required for applying coatings or linings, welding, adhesive bonding, decontamination, and other applications. It will discuss the feasibility and benefits of PLA when compared to other laser technologies as well as traditional surface preparation methods. Detailed information is provided on the equipment, including a generic description, suitable applications and locations for use, types of coatings or contaminants suitable for removal, advantages, and limitations. This guide includes requirements for operating conditions, and environmental, health, and safety compliance. Appendix A provides explanatory information, some of which uses terms specific to AMPP SP21511-1, “Laser Ablation for Metallic Surface Preparation of Ferrous Metals, Pulsed Laser.” Appendix B provides an amplification of considerations for use including technical information regarding the interaction of the laser with coatings and substrate. Appendix C addresses additional considerations for environmental approvals. Appendix D lists equipment and operating parameters. A visual guide, proposed nomenclature AMPP Guide 21711, titled “Guide and Reference Photographs for Steel Surface Non-Mechanical Cleaning by Pulsed Laser Ablation” is in development.
This guide applies only to the use of Q-switched PLA systems on ferrous metal substrates (does not include stainless steel) and the coatings applied to them. There are numerous laser types and substrate materials that may be suitable for certain laser treatments. Other laser types and substrates will be addressed by separate standards in the future.
Continuous wave laser technology, also called CW lasers, designed to remove target materials by combustion, versus ablation/vaporization, is not within the scope of this guide.
