火电厂循环泵叶轮材料Cr30A在脱硫浆液腐蚀环境中的交互损伤失效行为研究

doi:10.11902/1005.4537.2018.139

中国腐蚀与防护学报

2019, Vol. 39

Issue (4): 353-358 DOI: 10.11902/1005.4537.2018.139

研究报告

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火电厂循环泵叶轮材料Cr30A在脱硫浆液腐蚀环境中的交互损伤失效行为研究

余仁强,何建军(

),李微,任延杰,杨旺

长沙理工大学能源与动力工程学院长沙 410114

Erosive Wear of Cr30A High Chromium Cast Iron in a Simulated Circulating Pump Operation Condition with Slurry Related to Wet DesulfurationProcess in Thermal Power Plant

YU Renqiang,HE Jianjun(

),LI Wei,REN Yanjie,YANG Wang

School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China

全文: PDF(7988 KB) HTML

摘要:

采用微观形貌观察以及失重法研究了不同转速下循环泵叶轮材料高铬铸铁Cr30A在模拟湿法脱硫浆料环境中的腐蚀磨损行为，研究了转速对高铬铸铁腐蚀磨损行为的影响以及腐蚀-磨损交互作用。结果表明，腐蚀磨损中机械磨损占主导作用。腐蚀-磨损交互作用程度随转速不同而产生变化，当转速为400 r/min时，腐蚀磨损试样表面无氧化膜，腐蚀磨损交互作用量占总腐蚀磨损量的48.73%，表现为协同作用；当转速为1200 r/min时，腐蚀磨损试样表面存在致密氧化膜，腐蚀-磨损交互作用量为负，表现为对抗作用。腐蚀-磨损交互作用是影响材料耐磨蚀性能的重要因素。

关键词 ：脱硫循环泵, 高铬铸铁Cr30A, 腐蚀磨损, 交互作用, 湿法脱硫

Abstract：

The erosion wear performance of Cr30A high chromium cast iron in a simulated circulating pump operation condition with slurry related to wet desulfuration process for thermal power plant, was investigated by means of mass loss test and microstructure examination. The result shows that with the increasing rotation speed, the mass loss of the steel significantly increases. The wear component is the main fraction of the total amount of corrosion-wear. When the rotation speed is 400 r/min, there is no oxide scale on the surface of the test steel sample. The component of interaction for corrosion and wear may be accounted for 48.73% of the total corrosion-wear, implying that there existed synergistic effect of the two. When the rotation speed is 1200 r/min, there is a dense oxide scale on the steel surface, the component of corrosion-wear interaction is negative and it seems that the two processes are antagonistic. The interaction between corrosion and wear is an important factor affecting the wear resistance of materials.

Key words： desulfurization circulating pump Cr30A high chromium cast iron erosion wear synergistic interaction esulfuration by wet processes

收稿日期: 2018-09-28

ZTFLH:

TK05

基金资助:湖南省教育厅科学研究项目重点项目(18A143)

通讯作者: 何建军 E-mail: hejianjun329@126.com

Corresponding author: Jianjun HE E-mail: hejianjun329@126.com

作者简介: 余仁强，男，1994年生，硕士生

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引用本文:

余仁强,何建军,李微,任延杰,杨旺. 火电厂循环泵叶轮材料Cr30A在脱硫浆液腐蚀环境中的交互损伤失效行为研究[J]. 中国腐蚀与防护学报, 2019, 39(4): 353-358.
Renqiang YU, Jianjun HE, Wei LI, Yanjie REN, Wang YANG. Erosive Wear of Cr30A High Chromium Cast Iron in a Simulated Circulating Pump Operation Condition with Slurry Related to Wet DesulfurationProcess in Thermal Power Plant. Journal of Chinese Society for Corrosion and protection, 2019, 39(4): 353-358.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2018.139 或 https://www.jcscp.org/CN/Y2019/V39/I4/353

图1 腐蚀磨损装置示意图

图2 在不同转速条件下由磨损和腐蚀磨损引起的Cr30A铸铁质量损失

表1 腐蚀磨损过程中各因素引起的试样质量损失及其所占比例

图3 Cr30A铸铁在转速为400 r/min下两种不同浆液中腐蚀磨损后表面的SEM像

图4 Cr30A铸铁在转速为800 r/min下两种不同浆液中腐蚀磨损后表面的SEM像

图5 Cr30A高铬铸铁在转速为800 r/min条件下腐蚀磨损后表面EDS分析结果

图6 Cr30A铸铁在转速为1200 r/min下两种不同浆料中腐蚀磨损实验后表面的SEM像

图7 Cr30A铸铁在转速为1200 r/min条件下纯磨损后表面EDS分析结果

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