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Corrosion behaviour of 7075 aluminium alloy in acidic solution
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-10 , DOI: 10.1039/d0ra04215c Przemysław Kwolek 1
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-10 , DOI: 10.1039/d0ra04215c Przemysław Kwolek 1
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The objective of this work was to establish the influence of sodium molybdate on the corrosion kinetics of 7075 aluminium alloy in orthophosphoric acid aqueous solution. Corrosion rate was decreased from 75.98 to 3.24 g per m2 per day. The mechanism of corrosion inhibition was studied using scanning electron microscopy, X-ray photoelectron spectroscopy, UV-Vis spectrophotometry and electrochemical impedance spectroscopy. It was revealed that heteropolyoxomolybdate species act as the corrosion inhibitor. They adsorb onto the surface and inhibit an anodic process. Their influence on a cathodic process is much weaker. Phosphomolybdenum blue species do not inhibit corrosion process and their formation is undesirable.
中文翻译：
7075铝合金在酸性溶液中的腐蚀行为
这项工作的目的是确定钼酸钠对正磷酸水溶液中 7075 铝合金腐蚀动力学的影响。腐蚀率从每天每平方米2的 75.98 减少到 3.24 克。采用扫描电子显微镜、X射线光电子能谱、紫外-可见分光光度法和电化学阻抗谱研究了缓蚀机理。结果表明，杂多钼酸盐物质充当腐蚀抑制剂。它们吸附在表面上并抑制阳极过程。它们对阴极过程的影响要弱得多。磷钼蓝物质不会抑制腐蚀过程并且它们的形成是不希望的。
更新日期：2020-07-10
中文翻译：
7075铝合金在酸性溶液中的腐蚀行为
这项工作的目的是确定钼酸钠对正磷酸水溶液中 7075 铝合金腐蚀动力学的影响。腐蚀率从每天每平方米2的 75.98 减少到 3.24 克。采用扫描电子显微镜、X射线光电子能谱、紫外-可见分光光度法和电化学阻抗谱研究了缓蚀机理。结果表明，杂多钼酸盐物质充当腐蚀抑制剂。它们吸附在表面上并抑制阳极过程。它们对阴极过程的影响要弱得多。磷钼蓝物质不会抑制腐蚀过程并且它们的形成是不希望的。
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