Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
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Volume 72, Issue 12
Displaying 1-3 of 3 articles from this issue
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Commentary
Conference Publication
  • Analysis of Galvanic Corrosion Behavior of Three Metals with Fe/Zn/Al-ICM Sensor
    Yasuhiko Saijo, Jun Kobayashi, Tomoyasu Suzuki
    2023 Volume 72 Issue 12 Pages 306-311
    Published: December 10, 2023
    Released on J-STAGE: January 25, 2024
    DOIhttps://doi.org/10.3323/jcorr.72.306
    JOURNAL FREE ACCESS
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    ICM sensor consisting of three spiral-shaped electrodes was used to monitor the galvanic corrosion of a combination of three metals, iron, zinc, and aluminum in wet-dry cyclic condition. Zinc is anodically dissolved against iron as a sacrificial protection. In the case of NaCl, Al was less noble than Zn, but in the case of artificial sea salt, Al was more noble than Zn and hardly contributed to the sacrificial corrosion protection of Fe. The dissolution current of Al was larger in the wet-dry cycle than in the immersion.

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  • Evaluation of Liquid Ammonia SCC Susceptibility of Steels by Low-Temperature, Low-Pressure Test
    Takuya Kawarasaki, Yohei Sakakibara, Ippei Shinozaki, Gen Nakayama
    2023 Volume 72 Issue 12 Pages 312-317
    Published: December 10, 2023
    Released on J-STAGE: January 25, 2024
    DOIhttps://doi.org/10.3323/jcorr.72.312
    JOURNAL FREE ACCESS
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    In Japan, ammonia is expected to be used as a fuel, but stress corrosion cracking （SCC） can be a problem in large low-temperature storage tanks, which are necessary for a stable fuel supply. In order to search for materials with high strength and low SCC susceptibility, we developed a SCC test equipment that can be tested in low-temperature liquid ammonia and a test method that can reproduce SCC initiation in carbon steels in a short period of time. In addition, stainless steels SUS304 and SUS821L1 were also investigated for SCC susceptibility using the developed test method.

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