当前位置: X-MOL 学术Anti-Corros. Methods Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Corrosion behavior of WB36CN1 steel at different flow rates
Anti-Corrosion Methods and Materials ( IF 1.2 ) Pub Date : 2020-09-07 , DOI: 10.1108/acmm-04-2020-2291
Jian Song , Zhiming Gao , Chenxi Liu , Wenbin Hu

Purpose

This paper aims to study the effect of flow rate (0.42∼2.09 m/s) on the corrosion behavior of WB36CN1 steel pipe in the simulated secondary circuit water environment (170°C, 6 mg/L ethanolamine + 100 µg/L NaCl), for which an autoclave was used to simulate the secondary circuit environment for carrying out related experiments.

Design/methodology/approach

The corrosion behaviors were studied by electrochemical methods, morphological observations and elemental analysis.

Findings

As flow rate increases, the amplitude of the current noise fluctuates increased, noise resistance Rn and spectral noise resistance Rsn decreased, the shear stress on the surface of WB36CN1 steel increases, the oxygen content on the surface decreases, the roughness becomes smaller. Meanwhile, the energy of energy distribution plot is concentrated at high frequencies under the three flow conditions, the slopes of current power spectral density curve approach 0 db/decade. This means that the oxide on the surface becomes less and corrosion rate increases with increasing flow rate. The corrosion type of WB36CN1 steel was uniform corrosion; the degree of uniform corrosion is higher at high flow rate.

Originality/value

The effect of flow rate on the corrosion behavior of WB36CN1 steel pipe in the secondary circuit water environment was studied by using electrochemical methods in the laboratory. The effect mechanism of flow rate for corrosion behavior was obtained.



中文翻译:

WB36CN1钢在不同流速下的腐蚀行为

目的

本文旨在研究流量(0.42〜2.09 m / s)对模拟二次回路水环境(170°C,6 mg / L乙醇胺+ 100 µg / L NaCl)中WB36CN1钢管腐蚀行为的影响。 ,使用高压灭菌器模拟二次电路环境以进行相关实验。

设计/方法/方法

通过电化学方法,形态观察和元素分析研究了腐蚀行为。

发现

随着流量的增加,电流噪声的幅度波动增加,抗噪声能力R n和抗频谱噪声能力R sn降低,WB36CN1钢表面的剪切应力增加,表面的氧含量降低,粗糙度变小。同时,能量分布图的能量集中在三种流动条件下的高频下,当前功率谱密度曲线的斜率接近0 db / decade。这意味着表面上的氧化物变少,腐蚀速率随流速的增加而增加。WB36CN1钢的腐蚀类型为均匀腐蚀。高流速下均匀腐蚀的程度更高。

创意/价值

在实验室中,通过电化学方法研究了流量对WB36CN1钢管在二次回路水环境中的腐蚀行为的影响。得出了流速对腐蚀行为的影响机理。

更新日期:2020-09-30
down
wechat
bug