Daikuhara, T., Gomi, Y., Nakazato, N. and Sakai, M. (2020) Copper Tube Pitting Corrosion Product and Evaluation of Influence of Chloride Ion Concentration in Hot Water Environment. Zairyo-to-Kankyo, 69, 83-89.
https://doi.org/10.3323/jcorr.69.83

has been cited by the following article:

• TITLE: Relationship between Corrosion Form and Elution Behavior of Copper Tubes Surfaces with Different Residual Carbon Amounts

  AUTHORS: Yuma Kano, Itaru Ikeda, Takashi Iyasu, Yuna Yamaguchi, Yutaka Yamada, Osamu Sakurada

  KEYWORDS: Carbon Film, Residual Carbon Amount, Pitting Corrosion, Corrosive Anion, The Pitting Corrosion Resistance Test

  JOURNAL NAME: Materials Sciences and Applications, Vol.13 No.12, December 16, 2022

  ABSTRACT: It was well known that residual carbon on the inner surface of copper tubes was a cause of pitting corrosion, and copper tube surfaces with different residual carbon amount were different corrosion forms. In this study, the relation between corrosion form and elution of copper in immersion tests by accelerated corrosion test solutions was examined. Generally, pitting corrosion that occurs in actual machines was reported to observe chloride ion at the bottom of the pitting corrosion of copper tubes. Energy dispersive X-ray (EDX) mapping analysis indicated that chlorine was concentrated in the upper layer of the samples where copper was not detected under conditions of low residual carbon amount, while chlorine was concentrated under part of the micromounds (including the bottom of the pits) under conditions of high residual carbon amount. It was also suggested that the amount of copper eluted was related to the amount of residual carbon.