Two different sets of long term samples (LTS) were exposed in TEXTOR-94 at the liner with boronized and siliconized wall conditions. Measured erosion/deposition rates of the coating constituents were compared with sputtering rates calculated for pure elements. D 0-fluxes at the LTS locations were determined by the B2-EIRENE code. Over the whole liner, erosion of initial coatings by D 0 is observed. Boron erodes at a rate of 8.4×10 13 B cm −2 s −1 , while silicon erodes at a rate of 5.6×10 13 Si cm −2 s −1 , a factor of 1.5 lower than that of boron. With boronized walls, carbon atoms initially present in the a-C/B:D layers are eroded at a rate of 7.6×10 12 C cm −2 s −1 , at the same time 1.7×10 12 (Fe + Cr + Ni) cm −2 s −1 are deposited. Compared to boronized conditions where carbon erodes, deposition of carbon (1.7×10 13 cm −2 s −1) and of metals (3.8×10 12 cm −2 s −1) occurred during the Si campaign. Due to long time exposure at high wall temperature (350°C), hydrogenic isotopes desorb; (D + H)/(B + C) and (D + H)/(Si + C) ratios degrade from originally ∼0.4 to ∼0.2.