Study on different preparing methods of the metallized fiber core for optical fiber corrosion sensor

摘要

Three metallized methods for forming a film on fiber core to monistor corrosion process have been studied and compared. The first one is sputtering nickel controlled by magnetic field under vaccum environment. The second and third is respectively chemically electroplating silver and physical vacuum depositing (PVD) iron. The former two methods aim at forming middle layer for conductive electricity to provide conditions for further electroplating steel. The comparative aspects include electrochemical measurements, such as Cl~- affecting on open circuit potential Ecorr and linear polarized resistance Rp. Furtherly, a metallized fiber is prepared to monitor corrosion of ship hull steel, which is approved by scanning electronic microscope and X-ray diffraction analysis. The shifting of output light power displays corrosive process of steel.