Effect to Material of Steel Member in Using Pulse Laser Cleaning for Surface Adjustment

Abstract

In order to o prevent deterioration of coating paint on a steel bridge member, it is very important to well adjust the surface of the member before repainting A major method of surface adjustment is the blast cleaning. But there is a problem in using the blast cleaning method because it spread out a great amount of dust and it have to be properly disposed. Then, a laser cleaning method is now getting attention, because it can instantaneously sublimate the paint and absorb it into the container of the machine. However, there is possibility that the heat of laser might damage the steel. Therefore this paper researches the effect of laser to the material, and confirm the safety and the efficiency of the laser cleaning method.