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中国腐蚀与防护学报  2016, Vol. 36 Issue (3): 253-259    DOI: 10.11902/1005.4537.2015.128
  研究报告 本期目录 | 过刊浏览 |
低合金钢在高矿化度矿井水环境下的腐蚀行为
潘俊艳1,陈华辉1(),马峰1,谢波2,吴迎飞1,赵赋1,张祚炜1
1. 中国矿业大学 (北京) 机电与信息工程学院材料科学与工程系 北京 100083
2. 山东兖州煤业股份有限公司综机管理中心 兖州 272100
Corrosion Behavior of Low Alloy Steels in High-mineralized Mine Water
Junyan PAN1,Huahui CHEN1(),Feng MA1,Bo XIE2,Yingfei WU1,Fu ZHAO1,Zuowei ZHANG1
1. Department of Materials Science and Engineering, School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
2. Management Center of Synthesizing Mining Equipment, Yanzhou Co., LTD., Yanzhou 272100, China
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摘要: 

对27SiMn,30CrMnSi,30CrMnTi,40Cr低合金钢以及Q550等5种液压支架常用钢在高矿化度矿井水中的腐蚀性能进行了研究,并以自来水、NaCl溶液作为对比腐蚀介质进行比较。通过理论计算、盐雾实验、浸泡实验以及电化学实验进行了一系列腐蚀性能测试,同时利用SEM,EDS和XRD等分析手段对成分和形貌进行了分析。结果表明:Cr和Si对低合金钢的耐蚀性有较大影响:在Cl-环境下,Si的作用较大,Cr次之;在O2 (水、大气) 环境下,Cr的作用较大,Si次之。因此,在矿井水环境下,30CrMnTi和40Cr低合金钢具有较好的耐蚀性。低合金钢在矿井水下的腐蚀,不仅与合金元素有关,还与矿物离子形成的垢膜致密性有关。水垢一方面填充了铁锈腐蚀产物疏松多孔的结构,减缓了低合金钢的腐蚀速率;另一方面,垢下区域由于电解质溶液中氧浓度较低,又加快了腐蚀速率。在3种不同腐蚀介质中,低合金钢的腐蚀程度从大到小依次为:3.5%NaCl溶液>高矿化度矿井水>自来水。

关键词 低合金钢矿井水腐蚀    
Abstract

The corrosion behavior of low alloy steels, such as 27SiMn, 30CrMnSi, 30CrMnTi, 40Cr and Q550 was studied comparatively in high-mineralized coal mine water, tap water and NaCl solution by means of immersion test, salt spray test and electrochemical methods as well as XRD and SEM with EDS. The results showed that elements Cr and Si can significantly affect the corrosion resistance of low alloy steels: in chloride containing media, Si exhibits stronger effect than Cr on the corrosion; whereas in the presence of oxygen (water and gas phase), Cr exhibits stronger effect than Si. Therefore, 30CrMnTi and 40Cr have better corrosion resistance in the coal mine water. The corrosion behavior of the low alloy steels in the coal mine water depend not only on the role of alloying elements but also on the compactness of the formed limescale induced by mineral ions. The limescale, on one hand, can fill the porous rust layer, which slows down the corrosion rate of the steel, however, on the other hand, due to the low concentration of oxygen at the zone below the limescale, where the corrosion of the steel can be accelerated. Finally the corrosivity of three corrosive media can be ranked as the order from severe to mild: 3.5%NaCl solution, high mineralized mine water and tap water.

Key wordslow alloy steel    mine water    corrosion
收稿日期: 2015-07-22     
基金资助:兖州综采设备项目 (U03320) 资助

引用本文:

潘俊艳,陈华辉,马峰,谢波,吴迎飞,赵赋,张祚炜. 低合金钢在高矿化度矿井水环境下的腐蚀行为[J]. 中国腐蚀与防护学报, 2016, 36(3): 253-259.
Junyan PAN, Huahui CHEN, Feng MA, Bo XIE, Yingfei WU, Fu ZHAO, Zuowei ZHANG. Corrosion Behavior of Low Alloy Steels in High-mineralized Mine Water. Journal of Chinese Society for Corrosion and protection, 2016, 36(3): 253-259.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.128      或      https://www.jcscp.org/CN/Y2016/V36/I3/253

Steel C Si Mn Mo Cr B Ti Fe
27SiMn 0.24~0.34 1.10~1.40 1.10~1.40 --- --- --- --- Bal.
30CrMnSi 0.27~0.34 0.90~1.20 0.80~1.10 --- 0.80~1.10 --- --- Bal.
30CrMnTi 0.27~0.34 0.19~0.37 0.80~1.10 --- 1.00~1.30 --- 0.04~1.10 Bal.
40Cr 0.37~0.44 0.17~0.37 0.50~0.80 --- 0.80~1.10 --- --- Bal.
Q550 ≤0.18 ≤0.55 1.00~1.60 ≤0.40 ≤0.40 ≤0.003 --- Bal.
表1  实验用钢的化学成分
图1  实验用钢的理论大气腐蚀速率
图2  低合金钢在5%NaCl盐雾实验150 h后的腐蚀形貌
图3  Q550钢在盐雾实验环境下腐蚀150 h后表面锈蚀物的XRD谱
图4  低合金钢在矿井水和自来水介质中浸泡900 h后的腐蚀形貌图
图5  低合金钢在矿井水中浸泡900 h的SEM像
图6  30CrMnTi钢在矿井水中浸泡900 h后表面腐蚀产物SEM像及EDS结果
图7  低合金钢在3种不同介质中的电化学阻抗谱
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