API 5LB和X52MS碳钢抗氢致开裂性能的比较研究

IF 1.5 Q4 ELECTROCHEMISTRY

International Journal of Corrosion Pub Date : 2018-05-14 DOI:10.1155/2018/1604507

Rodrigo Monzon Figueredo, Mariana Cristina de Oliveira, Leandro Jesus de Paula, H. A. Acciari, E. N. Codaro

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引用次数: 10

摘要

研究了API 5LB和X52MS低碳钢在NACE 177-A、177-B和284-B溶液中的氢致开裂敏感性。在NACE TM0284标准测试前后对这些钢进行了金相分析。通过扫描电子显微镜和X射线散射能谱仪对腐蚀产物进行了表征，随后通过X射线衍射进行了鉴定。因此，发现pH直接影响腐蚀产物的溶解度和氢的渗透。两种钢在溶液177-A中都表现出普遍腐蚀，并且在溶液177-B中在它们的表面上形成了不连续的膜；然而，只有API 5L B钢未通过HIC试验，并且在溶液177-A中表现出更大的裂纹长度比。在pH较高的溶液284-B中，钢表现出较厚的mackinawite膜，没有内部裂纹。

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A Comparative Study of Hydrogen-Induced Cracking Resistances of API 5L B and X52MS Carbon Steels

Susceptibility to hydrogen-induced cracking of API 5L B and X52MS low-carbon steels in NACE 177-A, 177-B, and 284-B solutions has been investigated by the present work. A metallographic analysis of these steels was performed before and after NACE TM0284 standard testing. Corrosion products were characterized by scanning electron microscopy and X-ray dispersive energy spectrometry, which were subsequently identified by X-ray diffraction. Thus it was found that pH directly affects the solubility of corrosion products and hydrogen permeation. Both steels showed generalized corrosion in solution 177-A, and a discontinuous film was formed on their surfaces in solution 177-B; however, only the API 5L B steel failed the HIC test and exhibited greater crack length ratio in solution 177-A. In solution 284-B whose pH is higher, the steels exhibited thick mackinawite films with no internal cracking.

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来源期刊

International Journal of Corrosion ELECTROCHEMISTRY-

CiteScore

5.70

自引率

0.00%

发文量

审稿时长

14 weeks