Figure 1.

Diagram of the NIOSH electric arc wire thermal spray coating aerosol generator and exposure system (modified from Afshari et al., 2022). Thermal spray coating was performed in one room (a), and the aerosols piped to an exposure chamber in a separate room (B) divided by shaded glass doors and protective curtain. Abbreviations: Data Ram = real-time aerosol monitor; MOUDI = Micro Orifice Uniform Deposit Impactor; SEM = scanning electron microscopy; Temp = temperature; LPM = liters per minute; MFC = mass flow controller.