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首页> 外文期刊>International Journal of Electrochemical Science >Corrosion of N80 Steel in a Concentrated Tetrapotassium Pyrophosphate Solution and Corrosion Control by Vanadates
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Corrosion of N80 Steel in a Concentrated Tetrapotassium Pyrophosphate Solution and Corrosion Control by Vanadates

机译：N80钢在焦磷酸四钾浓溶液中的腐蚀及钒酸盐的腐蚀控制

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The main purpose of this work is to study the corrosion of N80 steel in a concentrated tetrapotassiumpyrophosphate (TKPP) solution at different temperatures and to evaluate the corrosion inhibitionperformance of relevant chemicals for N80 steel in this solution. This study employed the methods ofweight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and X-rayphotoelectron spectroscopy (XPS). The temperature had a significant influence on the corrosion rate ofN80 in solution. Specifically, the corrosion rate was moderate at low temperatures, but increaseddramatically when the temperature exceeded 90 °C. At a temperature of 120 °C, the rate was as high as731 mpy. Among the chemicals investigated, dichromates and vanadates showed excellent inhibitionperformance. The inhibition induced by vanadates was mainly due to the promotion of carbon steelpassivation. In the presence of 0.5 wt. % vanadate, the corrosion rate of N80 steel can be controlled toless than 3 mpy at a temperature of 120 °C.
机译：这项工作的主要目的是研究N80钢在不同温度下在浓四磷酸四钾（TKPP）溶液中的腐蚀，并评估该溶液中N80钢的相关化学物质的缓蚀性能。这项研究采用了重量​​损失，电位动力学极化，电化学阻抗谱（EIS）和X射线光电子能谱（XPS）的方法。温度对溶液中N80的腐蚀速率有显着影响。具体地，在低温下腐蚀速率是中等的，但是当温度超过90℃时腐蚀速率急剧增加。在120°C的温度下，速率高达731 mpy。在所研究的化学药品中，重铬酸盐和钒酸盐表现出优异的抑制性能。钒酸盐引起的抑制作用主要是由于碳钢钝化的促进。在0.5重量％的存在下。在80％的钒酸盐中，N80钢在120°C的温度下的腐蚀速率可控制在3 mpy以下。

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