温度对<strong>B10</strong>铜镍合金管冲刷腐蚀行为影响规律研究

doi:10.11902/1005.4537.2022.387

中国腐蚀与防护学报

2023, Vol. 43

Issue (6): 1329-1338 CSTR: 32134.14.1005.4537.2022.387 DOI: 10.11902/1005.4537.2022.387

研究报告

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温度对B10铜镍合金管冲刷腐蚀行为影响规律研究

王晓¹, 李明¹, 刘峰²(

), 王忠平¹, 李相波², 李宁旺¹

^1.中车青岛四方机车车辆股份有限公司青岛 266111
^2.中国船舶集团公司第七二五研究所海洋腐蚀与防护重点实验室青岛 266237

Effect of Temperature on Erosion-corrosion Behavior of B10 Cu-Ni Alloy Pipe

WANG Xiao¹, LI Ming¹, LIU Feng²(

), WANG Zhongping¹, LI Xiangbo², LI Ningwang¹

^1.CRRC Qingdao Sifang Co., Ltd., Qingdao 266111, China
^2.State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China

引用本文:

王晓, 李明, 刘峰, 王忠平, 李相波, 李宁旺. 温度对B10铜镍合金管冲刷腐蚀行为影响规律研究[J]. 中国腐蚀与防护学报, 2023, 43(6): 1329-1338.
Xiao WANG, Ming LI, Feng LIU, Zhongping WANG, Xiangbo LI, Ningwang LI. Effect of Temperature on Erosion-corrosion Behavior of B10 Cu-Ni Alloy Pipe[J]. Journal of Chinese Society for Corrosion and protection, 2023, 43(6): 1329-1338.

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摘要:

通过可原位测量的管流式实验装置，采用电化学阻抗谱等电化学方法研究B10管在不同温度的天然海水中的腐蚀行为，采用SEM、XPS等方法分析其腐蚀形貌及腐蚀产物成分。结果表明，在10~50 ℃范围内，随着温度的降低，B10管表面的腐蚀产物膜逐渐致密，膜层耐蚀性逐渐升高，腐蚀速率逐渐降低。在10、25和35 ℃时，B10管的腐蚀速率随时间的延长逐渐降低，腐蚀产物主要为Cu₂O、NiO和FeOOH，对基体有较好的保护作用；在50 ℃时，B10管表面腐蚀产物为CuO、Ni和FeO，对基体的保护性较差。

关键词 ： B10铜镍合金管, 冲刷腐蚀, 温度, 原位电化学测试, 腐蚀产物膜

Abstract：

The corrosion behavior of B10 Cu-Ni alloy pipe in natural seawater at different temperatures was investigated via pipe flow test device capable of in-situ measurement designed independently by means of electrochemical impedance spectroscope (EIS) and other electrochemical methods, and the corrosion morphology and corrosion products composition were analyzed by scanning electron microscope (SEM) and X-ray photoelectron spectroscope (XPS). The results indicated that the corrosion product film on the surface of B10 pipe became denser with the decrease of temperature in the range of 10-50 ℃, leading to the increase of corrosion resistance of the film and the decrease of corrosion rate of the alloy. The corrosion behavior of B10 pipe in seawater would change with time and temperature. At 10, 25 and 35 ℃, the corrosion rate of B10 pipe gradually decreased with the extension of time, and the corrosion products were mainly Cu₂O, NiO and FeOOH, resulting in a better protective effect to the matrix. At 50 ℃, the corrosion products on the surface of B10 pipe were CuO, Ni and FeO, which presented poor protective effect to the substrate.

Key words： 90/10 copper-nickel pipe erosion-corrosion temperature real-time electrochemical testing corrosion product film

收稿日期: 2022-12-07 32134.14.1005.4537.2022.387

ZTFLH:

TG174

通讯作者: 刘峰，E-mail: liufeng279@126.com，研究方向为材料表面改性以及海洋腐蚀与防护技术

Corresponding author: LIU Feng, E-mail: liufeng279@126.com

作者简介: 王晓，女，1997年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2022.387 或 https://www.jcscp.org/CN/Y2023/V43/I6/1329

图1 管流式实验装置示意图

图2 B10管在不同温度海水下冲刷腐蚀不同时间后的SEM形貌

图3 B10管在10和50 ℃时冲刷腐蚀1和30 d腐蚀产物膜的元素含量

图4 B10管在10 ℃冲刷腐蚀1和30 d的XPS谱

表1 B10管在10 ℃下冲刷1和30 d的XPS拟合结果 (mass fraction / %)

图5 B10管在50 ℃冲刷腐蚀1和30 d的XPS谱

表2 B10管在50 ℃下冲刷1和30 d的XPS拟合结果 (mass fraction / %)

图6 B10管在不同温度海水中冲刷腐蚀不同时间后的EIS

图7 B10管在海水中冲刷腐蚀后EIS拟合的等效电路图

表3 B10管在不同温度海水中冲刷腐蚀不同时间的EIS拟合数据

图8 Rct和Rf随时间变化曲线

图9 B10管在不同温度海水中随时间变化的OCP

图10 B10管在10和50 ℃海水中冲刷腐蚀的早期、中期以及后期的腐蚀机理示意图

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