An optical fibre corrosion sensor with an electroless deposit of Ni–P

Electroless nickel–phosphorus plating on SiCp/Al composite from acid bath with nickel activation

“…To overcome defects as mentioned above, an attempt is made at coating metal on this class of composite by electroless nickel-phosphorus plating process, which provides distinct advantages, for instance, uniformity and hardness of deposits on complex shapes, low-cost as well as simple equipment [7,8]. Electroless nickel-phosphorus plating has been widely used to fabricate metallic films on dielectric surfaces as engineering protection coatings or functional films [9,10].…”

Elaboration of an optical fibre corrosion sensor for aircraft applications

“…[14] the research on optical fibre corrosion sensors (OFCS) fabricated by electroplating an Fe-C alloy film onto an optical fibre core within the sensing region is reported. In our laboratory, was demonstrated the feasibility of an optical fibre corrosion sensors when the sensing region of the optical fibre is metallised with a chemical nickel-phosphorus deposit [15] and with a copper film deposited through electroless method [16]. The last paper shows that the degradation of the copper surface by corrosion is uniform, in acid solution at low concentration and the optical sensor manufactured is sensitive in high acid concentration, when corrosion takes place through pits and cracks.…”

Development of stripped-cladding optical fiber sensors for continuous monitoring

“…are attached to the uncladded waveguide [10][11][12][13][14]. In other reports the transducers measure refractive index changes indicating chemical reaction extents [15][16][17][18]. Optical sensing of an environment's corrosiveness, the relative capacity of an environment to affect a metallic corrosion optical transducer, has been reported by Abderrahmane et al [18] and Jaffrezic-Renault's group [19,20].…”

“…In other reports the transducers measure refractive index changes indicating chemical reaction extents [15][16][17][18]. Optical sensing of an environment's corrosiveness, the relative capacity of an environment to affect a metallic corrosion optical transducer, has been reported by Abderrahmane et al [18] and Jaffrezic-Renault's group [19,20]. This paper describes relationships between light propagation within stripped waveguides and the real refractive index of "measured" fluids, with the aim of developing an automated self-referencing mechanism.…”

“…1). The optical fibers are assumed to be completely straight, a common situation found for glass waveguide sensors [2][3][4][5][6]18,19]. The simulations presented here are restricted to materials considered non-absorbing dielectrics with k = 0.…”