The corrosion of porous silicon in KOH and NaOH aqueous solution with or without organic solvents was studied by weight loss measurements. The results show that the corrosion rate goes up with increasing temperature and concentration of alkali solution. In the 1?0M NaOH aqueous solution, the corrosion rate can be improved with the additives of ethanol or methanol, and reduced by the additives of acetonitrile, isopropanol or N,N-dimethylformamide. The activation parameters of E a , A, DH a and DS a of porous silicon corrosion in KOH and NaOH aqueous solution with or without ethanol were calculated and discussed.

Corrosion behaviour of the high‐strength galvanized steel wires under tensile stress was researched by electrochemical polarization and salt spray test (SST) using simulated acid rain as electrolyte. Electrochemical polarization and SST results showed corrosion rate rose significantly with increasing tensile stress; white grains were observed by SEM after polarization, while cellular and dendritic crystals appeared on the rust layer after SST. XRD and TG‐DTA results revealed (Zn(OH)2)3 · ZnSO4 · 5H2O was the main corrosion product, and traces of Fe2(SO4)2O · 7H2O, Fe2(SO4)3, Fe2O3 · H2O were also detected. A three‐stage corrosion process for the galvanized steel wires during SST was proposed.

This paper reports the research of a Fiber Optic Corrosion Sensor (FOCS) fabricated by electroplating an Fe-C alloy film onto an optical fiber core within the sensing region. Fabrication of the sensing film involves removal of the cladding, nietallization of the optical fiber core, and electroplating of the Fe-C alloy layer. The initial results show that the sensor output power increases by about 35% when the film is corroded with the sensor ofthe film passivated. and that the time taken to rise to maximum output power is prolonged by almost 3 times, compared with that for non-passivated film. These results demonstrate the feasibility of using optical fiber corrosion sensors for monitoring corrosion of steel in civil structures.

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