突扩管条件下材料的冲刷腐蚀机理研究Ⅰ碳钢

中国腐蚀与防护学报

2000, Vol. 20

Issue (5): 257-262

研究报告

本期目录 | 过刊浏览

突扩管条件下材料的冲刷腐蚀机理研究Ⅰ碳钢

阍永贵;郑玉贵;姚治铭

中科院金属腐蚀与防护研究所

EROSION-CORROSION MECHANISM UNDER SUDDEN PIPE EAPANSION Ⅰ.CARBON STEEL

Yonggui Yan;Yugui Zheng;Zhiming Yao

中科院金属腐蚀与防护研究所

全文: PDF(181 KB)

摘要: 利用新近研制的双相流冲刷腐蚀激光多普勒实验装置,通过失重测试\表面形貌观察、局部流速流态测试和典型部位的电化学测试，研究了突扩管条件下碳钢AISI1020在单相及含砂人工海水介质中的冲刷腐蚀机理。结果表明：冲刷腐蚀峰值发生在距突扩位置约2.5D的部位(D为粗管直径),与重附着点的位置相同.不同部位的冲刷腐蚀形貌有着明显差异,并与局部流速流态是相互对应的.冲刷对腐蚀的影响主要表现在流动对氧传质过程的促进上,而对阳极过程的影响相对较小.

关键词 ：冲刷腐蚀, 碳钢, 人工海水, 扰流, 激光多普勒

Abstract：The erosion-corrosion mechanism of AISI1020 in artificial sea water with or without 1000×10-6 silica sand under sudden pipe expansion condition was investigated through weight loss test, surface morphology observation,local flow regime measurements (LDA) and electrochemical measurements at specific position.The results showed that the maximum of erosion-corrosion was located at about 2.5D (large pope diameter) downstream the sudden pipe expansion which was the same as the reattaxhment point.The erosion-corrosion morphplogies at different positions were significanly different, which was just responding the local flow regime .The effect of flow in anodic process of carbon steel was relatively small

Key words： erosion-corrosion carbon steel artificial sea water disturbed flow Laser-Doppler-Anemometry electroc

收稿日期: 1999-08-30

ZTFLH:

TG172.85

Corresponding author: Yonggui Yan

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引用本文:

阍永贵; 郑玉贵; 姚治铭 . 突扩管条件下材料的冲刷腐蚀机理研究Ⅰ碳钢[J]. 中国腐蚀与防护学报, 2000, 20(5): 257-262 .
Yonggui Yan, Yugui Zheng, Zhiming Yao. EROSION-CORROSION MECHANISM UNDER SUDDEN PIPE EAPANSION Ⅰ.CARBON STEEL. J Chin Soc Corr Pro, 2000, 20(5): 257-262 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2000/V20/I5/257

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