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

Kano, Yuma; Ikeda, Ikuko; Iyasu, Takashi; Yamaguchi, Yuna; Yamada, Yutaka; Sakurada, Osamu

doi:10.4236/msa.2022.1312037

Cited by 2 publications

(2 citation statements)

References 17 publications

(12 reference statements)

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“…Some studies [9] [10] have shown that it is possible to evaluate the pitting corrosion resistance from the relationship between the number of micro-mounts and the amount of residual carbon. Analysis of cross-sections of the corroded region after the immersion test using the rapid evaluation test solution suggested that copper tubes with low residual carbon amount showed corrosion over the entire surface, while those with high residual carbon amount showed pitting corrosion [10]. Such pitting corrosion is usually quick and could require equipment shutdown due to a leak.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Expansion Process to Improve Corrosion Resistance of Copper Tubes with High Residual Carbon on the Inner Surface

Kano¹,

Ikeda²,

Iyasu³

et al. 2023

MSA

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Residual carbon on the inner surface of copper tubes is known to be a cause of pitting corrosion. We showed previously that the rapid filling test was useful to evaluate the pitting corrosion resistance of copper tubes. Immersion tests using the rapid evaluation test solution showed that corrosion occurs on the entire surface of copper tubes with low residual carbon amounts, while those with high residual carbon amounts show pitting corrosion. Therefore, it is necessary to improve the corrosion resistance of copper tubes with high residual carbon amount, which are expected to undergo pitting corrosion. As pitting corrosion occurs when anodes are locally concentrated on part of the metal surface, it has been suggested that anodes be dispersed over the entire surface by the processing of the metal surface. Metal processing methods have various purposes, including changing the shape and properties of metals, and in this case, leading to desirable surface properties (such as expansion and drawing processes). Here, we focused on the expansion process and its effects on corrosion resistance of copper tubes. The results showed that hydraulic expansion has a significant effect on the inner copper surface by improving corrosion resistance as the anode area increases.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Expansion Process to Improve Corrosion Resistance of Copper Tubes with High Residual Carbon on the Inner Surface

Kano¹,

Ikeda²,

Iyasu³

et al. 2023

MSA

Self Cite

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show abstract

“…These requirements include higher mechanical strength for materialsaving construction, lightweight energy-saving components, and better quality for excellent safety and longer service life. After all, cost-effectiveness plays a crucial role [1].…”

Section: Introductionmentioning

confidence: 99%

Cashew Nut Shell Liquid as an Anticorrosive Agent in Ceramic Materials

et al. 2023

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One of the significant challenges of the ceramics industry is to increase the corrosion resistance of ceramic materials, and the study of this corrosion requires a detailed investigation using several characterization methods, such as the knowledge of technological properties including the absorption, apparent porosity, and mechanical resistance of these ceramic materials. This corrosion resistance can be further improved by using a protective coating on the surface of ceramic materials, such as cashew nut shell liquid (CNSL), which has been used as a green, environmentally friendly corrosion inhibitor. This work investigated the inhibitory action of CNSL on the corrosion of ceramic materials. Clay from the Brazilian Northeast was used in a simulated seawater environment at room temperature for the immersion corrosion test. Sets of prismatic specimens bathed in CNSL were immersed in a corrosive solution and compared with other samples without CNSL immersed in a corrosive environment. At the end of 70 days in corrosive solution, the ceramic specimens without CNSL showed signs of wear on the surface, associated with an average mass loss of 20 mg and an average corrosive rate of 0.017 mm/year. On the other hand, the bodies bathed in CNSL showed no mass loss, reinforcing the potential of CNSL as a protective agent against corrosion.

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

Cited by 2 publications

References 17 publications

Evaluation of Expansion Process to Improve Corrosion Resistance of Copper Tubes with High Residual Carbon on the Inner Surface

Evaluation of Expansion Process to Improve Corrosion Resistance of Copper Tubes with High Residual Carbon on the Inner Surface

Cashew Nut Shell Liquid as an Anticorrosive Agent in Ceramic Materials

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