Effect of laser treatment on the surface of copper alloys

▶ The materials of the investigated archaeological objects (bow and ring) is bronze. ▶ The main components of the corrosion layers are C, O, Cu and P. ▶ The cleaning with ns and μs pulses resulted in the external deposit layer removal. ▶ The laser-deposit interaction resulted in melting and evaporation of the surface layer. ▶ After ns pulses the surface was relatively smooth and only slightly re-molten.