Insight into the Influence of Cu on the Corrosion Mechanism of 1%Ni Weathering Steel in a Simulated Containing NaCl Atmospheric Environment
It is difficult for traditional weathering steel (WS) to form a protective rust layer to withstand the chloride ions and high humidity. Hence, there is an urgent need to develop a new type of low-cost WS with excellent corrosion resistance in the containing NaCl environment. This study aims to deter...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
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| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/14/12/1401 |
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| Summary: | It is difficult for traditional weathering steel (WS) to form a protective rust layer to withstand the chloride ions and high humidity. Hence, there is an urgent need to develop a new type of low-cost WS with excellent corrosion resistance in the containing NaCl environment. This study aims to determine the influence of Cu on the corrosion mechanism of 1%Ni WS in simulated containing NaCl atmospheric environments. By increasing the Cu content (0.15–0.55%), the corrosion resistance of WS is enhanced. The increasing Cu content promotes the formation of a stable and compact rust layer, significantly enriching the proportion of α-FeOOH to equip the rust layer with a physical barrier. The formation of CuO deposits in the holes and cracks make the rust layer more compact and uniform. The increased Cu content promotes the formation of CuFeO<sub>2</sub> and increases the content of NiFe<sub>2</sub>O<sub>4</sub>. The formation of CuFeO<sub>2</sub> and NiFe<sub>2</sub>O<sub>4</sub> then equips the rust layer with a chemical barrier. Hence, the addition of Cu could enhance the resistance of 1%Ni WS to containing NaCl atmospheric environments. |
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| ISSN: | 2075-4701 |