Air Temperature Measurement and Monitoring Inside Cold Plasma Treatment Reactor for Steel Wire Surface Cleaning Using Fiber Bragg Grating (FBG)

Abstract

Surface cleaning is one of the critical preliminary process in wire manufacturing surface treatment for the purpose of improved surface wettability and adhesion. However, concern in terms of environmental impacts arises due to common practices of wet?chemicals which led to severe human health. Surface cleaning using cold plasma treatment might become an alternative, but it seems that the issue of gas temperature measurement and monitoring have not been dealt with in depth, since the gas temperature can indicate the type of plasma formed inside the designed reactor. Fiber Bragg grating (FBG) might became an option for gas temperature measurement and monitoring. In this research, air temperature in cold plasma treatment reactor was measured and monitored using FBG, with effects of graphene electrode. Surface roughness of metal wire surface was measured and qualitative observation through optical microscope was carried out, before and after plasma treatment for the purpose of performance evaluation. From the results, it is found that type of plasma discharge formation has been successfully identified through air temperature profiling and monitoring using FBG. Highest surface roughness reduction is performed by filamentary type of discharge of 9 kV applied voltage based on generated air temperature profile by FBG.