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引用次数: 0
摘要
目的 作为一种常见的发动机冷却液，乙二醇在汽车行驶的高温条件下会产生腐蚀性酸性副产品，特别是草酸（OA），它会缩短发动机的使用寿命。同时，在冷却液制备过程中还会引入氯离子。结果结果表明，铝合金的腐蚀速率随着 OA 和 Cl- 浓度的增加而增加。加入 Cl- 后，铝合金的表面膜进一步受到破坏，Cl- 与 OA 有协同作用，它们之间的相互作用进一步加速了铝合金的腐蚀。原创性/价值 研究了 ADC12 铝合金在 OA、Cl- 及其混合溶液中的腐蚀情况；讨论了 OA 和 Cl- 对 ADC12 铝合金腐蚀的协同作用，以及形成的草酸铝对其腐蚀的抑制作用。
Synergistic corrosion behavior of Cl− and oxalic acid on ADC12 aluminum alloy
Purpose
As a commonly engine coolant, ethylene glycol can produce corrosive acid byproducts at high temperatures when the car is running, specifically oxalic acid (OA), which can shorten the service life of engine. At the same time, chloride ions can also be introduced during coolant preparation processes. Therefore, this paper aims to investigate the synergistic corrosion behavior of Cl− and OA on ADC12 aluminum alloy.
Design/methodology/approach
The electrochemical tests, scanning electron microscopy, energy dispersive spectrometer, X-ray diffraction and X-ray photoelectron spectroscopy) were used.
Findings
The results showed that the corrosion rate of the aluminum alloy increased with the increase of OA and Cl− concentrations. After adding Cl−, the surface film of the aluminum alloy was further damaged, Cl− has a synergistic effect with OA and their interaction further accelerated the corrosion of the aluminum alloy. Nevertheless, as the immersion time increased, the corrosion rate of the aluminum alloy gradually diminished due to the formation of aluminum oxalate.
Originality/value
The corrosion of ADC12 aluminum alloy was studied in OA, Cl− and their mixed solutions; the synergistic effect of OA and Cl− on the corrosion of ADC12 aluminum alloy was discussed, and aluminum oxalate formed inhibited its corrosion.
期刊介绍：
Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world.
Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties.
• New methods, materials and software
• New developments in research and industry
• Stainless steels
• Protection of structural steelwork
• Industry update, conference news, dates and events
• Environmental issues
• Health & safety, including EC regulations
• Corrosion monitoring and plant health assessment
• The latest equipment and processes
• Corrosion cost and corrosion risk management.
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