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材料と環境 Vol. 73 (2024), No. 10

ISIJ International
belloff
オンライン版ISSN: 1881-9664
冊子版ISSN: 0917-0480
発行機関: Japan Society of Corrosion Engineering

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  1. Vol. 74 (2025)

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キーワードランキング

13 Dec. (Last 30 Days)

材料と環境 Vol. 73 (2024), No. 10

Electrochemical Behavior of Mg-Mn Alloy in NaCl Solutions with Different Concentrations

Jian Tang, Muye Yang, Shigenobu Kainuma

pp. 230-233

DOI:

10.3323/jcorr.73.230

抄録

This study investigated the impact of NaCl concentration on the electrochemical performance of one kind of commercial Mg-Mn alloy （M1C）. Firstly, potentiodynamic polarization （PDP） tests were conducted to determine corrosion behavior of M1C in NaCl solutions with concentrations of 0.1 mass％, 0.5 mass％, 3.5 mass％, and 10.0 mass％. Additionally, electrochemical impedance spectroscopy （EIS） tests were performed to analyze the oxide film thickness across varying solution concentrations. The PDP results indicated that the corrosion rate of M1C increased with the increase of solution concentration. Furthermore, breakdown potential was observed in anodic polarization curves when the concentration of NaCl solution was over 0.5 mass ％. The EIS results showed that after 24h immersion, thickness of MgO film decreased with increasing NaCl concentration and then stabilized.

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Electrochemical Behavior of Mg-Mn Alloy in NaCl Solutions with Different Concentrations

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Ris

NaCl水溶液中におけるWC-Ni-Cr-Mo系超硬合金の腐食挙動に及ぼすpHおよび電位の影響

伊藤 暢晃, 山本 涼太郎, 杉山 憲一, 八鍬 浩, 大井 梓, 多田 英司

pp. 234-243

DOI:

10.3323/jcorr.73.234

抄録

The corrosion resistance of WC-Ni-Cr-Mo cemented carbides in aqueous NaCl solutions at various pH values has been investigated by electrochemical measurements, surface observation and solution analysis. In acidic environments, WC passivates and binder metals selectively dissolve. In neutral environments, Cr and Ni passivate at corrosion potential and lower potentials than 0.5 V and WC either passivate or dissolve at a slower rate, while transpassive dissolution of Cr in the binder and dissolution of W occurs at potentials higher than 0.5 V. In a basic environment, the dissolution behaviour of the WC-Ni-Cr-Mo alloy is similar to that in a neutral environment, however, the dissolution of WC occurs significantly with increasing anodic potential from corrosion potential.

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NaCl水溶液中におけるWC-Ni-Cr-Mo系超硬合金の腐食挙動に及ぼすpHおよび電位の影響

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13 Dec. (Last 30 Days)

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