XPS study of five fluorinated compounds deposited on calcarenite stone: Part II: Aged samples

This paper reports the results of XPS study of the chemical modifications that occurs at the surface of five fluorinated compounds, deposited on calcarenite specimens, after 240 h of a simulated ageing in a climatic chamber under UV radiation and thermal stress. It has been found that the modifications occurred after this ageing treatment are not dramatic, nevertheless they are revealed by XPS analysis. However, these modifications do not affect the values of the static contact angles which remains practically unchanged after the ageing treatment with respect to those obtained before.