Multivariate analysis-based laser-induced breakdown spectroscopy for monitoring of laser paint cleaning

On the study of paintings' stratigraphy by fs-LIBS and MA-XRF techniques

“…LIBS is a micro-destructive experimental technique that is employed for the determination of the composition of multilayered analytes, as well as for the elemental analysis of various materials, 10,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] and its main advantage over other techniques is that it does not require removal and displacement of part of the object for these purposes. In brief, this technique involves the collection and analysis of the radiation emitted aer the ablation of the surface material of an object, induced by a pulsed laser beam at intensities higher than 10 9 W cm −2 .…”

Degradation of Carbon Fiber-Reinforced Polymer Composites in Salt Water and Rapid Evaluation by Electrochemical Impedance Spectroscopy

“…A positive value denotes a positive linear correlation and a negative value negative linear correlation. It is generally considered that r ≥ 0.7 represents a strong correlation, and r ≥ 0.9 is a very strong correlation [ 27 , 37 , 38 ]. In this study, Pearson correlation analysis was utilized to analyze the correlation between the variation of phase angles at different frequencies and that of the | Z | 0.01Hz with time for the T700/VE composite.…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…The other paper was by Choi et al who used a high-powered Nd:YAG laser to clean thick paint layers from 304L stainless steel. 64 Two types of two dimensional maps were constructed: the LIBS intensities of the elements Cr (at 520.84 nm), Fe (at 374.96 nm) and Na (at 588.99 nm) and the correlation coefficient distribution maps. The latter type was constructed using the Pearson's correlation coefficient.…”

“…Two papers have discussed the use of LIBS to monitor laser-based paint removal . 63,64 In the paper by Li et al a LIBS platform that enabled the monitoring of paint removal from an aluminium-based aircraft skin was developed. 63 A high frequency (kilohertz level) nanosecond IR pulsed laser was used for the paint removal as well as the formation of the LIBS plasma.…”