| Effect of Mn and MnS on corrosion properties of domestic pipeline steels and welds |
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| 作者姓名： | 李云涛 杜则裕 陶勇寅 李建军 |
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| 作者单位： | [1]SchoolofMaterialsScienceandEngineering,TianjinUniversity,Tianjin,300072 [2]SchoolofMaterialsScienceandEngineering,TianjinUniversity,Tianjin,300072 [3]HebeiInstituteofPetroleumandTechnology,Langfang,065000 |
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| 摘 要： | Base metals of domestic pipeline steels were used to study the effect of Mn on corrosion properties of SSCC( Sulfide Stress Corrosion Cracking), and welds were carried out to study the effect of MnS on corrosion properties of HIC ( Hydrogen Induced Cracking) both in solutions with wet hydrogen sulfide ( H2 S ). They were respectively conducted by referring to the standards of SSCC and HIC. Testing results revealed that with the increase of content Mn, the resistance of SSCC will be decreased, from the point of metallurgic view, and it is Mn element not C element to lead to the testing results of SSCC. Meanwhile, even under the condition without inclusions MnS, HIC in welds still occurred. That is to say, MnS is not necessary for HIC, the presence of local banded structures in which Mn and P are inclined to aggregate cause to the phenomena of HIC.
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| 关 键 词： | 国产管道钢材 硫化锰 焊接方法 腐蚀性质 |
Effect of Mn and MnS on corrosion properties of domestic pipeline steels and welds |
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| Li Yuntao and Du Zeyu,School of Materials Science and Engineering,Tianjin University,Tianjin,. Tao Yongyin and Li Jianjun,Hebei Institute of Petroleum and Technology,Langfang,..Effect of Mn and MnS on corrosion properties of domestic pipeline steels and welds[J].China Welding,2004,13(2):123-127. |
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| Authors: | Li Yuntao and Du Zeyu School of Materials Science and Engineering Tianjin University Tianjin Tao Yongyin and Li Jianjun Hebei Institute of Petroleum and Technology Langfang |
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| Affiliation: | 1. School of Materials Science and Engineering,Tianjin University,Tianjin,300072
2. Hebei Institute of Petroleum and Technology,Langfang,065000 |
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| Abstract: | Base metals of domestic pipeline steels were used to study the effect of Mn on corrosion properties of SSCC(Sulfide Stress Corrosion Cracking), and welds were carried out to study the effect of MnS on corrosion properties of HIC (Hydrogen Induced Cracking) both in solutions with wet hydrogen sulfide(H_2S). They were respectively conducted by referring to the standards of SSCC and HIC. Testing results revealed that with the increase of content Mn, the resistance of SSCC will be decreased, from the point of metallurgic view, and it is Mn element not C element to lead to the testing results of SSCC. Meanwhile, even under the condition without inclusions MnS, HIC in welds still occurred. That is to say, MnS is not necessary for HIC, the presence of local banded structures in which Mn and P are inclined to aggregate cause to the phenomena of HIC. |
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| Keywords: | domestic pipeline steels welds Mn MnS corrosion properties |
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