Alloy Steel - Properties and Use by E. Morales

By E. Morales

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Min. Metal. , 70, 25. Brady, M. , & Wright, I. G. (2000). Alloy design strategies for promoting protective oxide-scale formation. J. Min. Met. Mat. , 52, 16. 26 Alloy Steel – Properties and Use Dowben, P. , & Wright, D. (1983). Surface segregation of chromium in Fe72Cr28(110) crystal. Surf. , 134, L524. Ebbinghaus, B. B. (1993). Thermodynamics of gas-phase chromium species – the chromium oxides, the chromium oxyhydroxides, and volatility calculations in waste incineration processes. Combustion and Flame, 93, 119.

A different solution was provided by Cha [11] who reported that a multiphase NbN/NbCrN film performed better than a single phased NbN film as a coating for metallic bipolar plates. The specimens were fabricated by sputtering Nb, Cr and using N2 as reaction gas. Cha states that concerning the interfacial resistance the chromium amount in the layer does not make much of a difference but the influence in the gas ratio is noticeable. The corrosion resistance improved significantly compared to the bare material but pitting corrosion appears with certain coating process parameters.

An improvement was reported for the contact angle being an important factor in the water management of a fuel cell. [38]. % of graphite. Additionally to the coating they brought a rib structure on the plate using a different resin graphite system. % of graphite as electrical conductor. The phenol-type hardener showed a high stability at 90 °C. Only a small amount of ionic impurities (<20 µS/cm) was found. 8 mOhm*cm at a tightening force of 1 MPa. Epoxy resins are also found in other applications such as shielding electromagnetic/radio frequency interferences and in dissipating static charges.

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