| 氯离子和电偶腐蚀对碳钢在热钾碱溶液中腐蚀的影响 |
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| 引用本文： | 陈步荣,马骏,鲍春生,朱一帆. 氯离子和电偶腐蚀对碳钢在热钾碱溶液中腐蚀的影响[J]. 腐蚀科学与防护技术, 2003, 15(6): 331-333 |
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| 作者姓名： | 陈步荣 马骏 鲍春生 朱一帆 |
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| 作者单位： | 南京工业大学材料科学与工程学院,南京,210009;南京工业大学材料科学与工程学院,南京,210009;南京工业大学材料科学与工程学院,南京,210009;南京工业大学材料科学与工程学院,南京,210009 |
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| 摘 要： | 研究了Cl-对碳钢和不锈钢在(K2CO3+KHCO3+V2O5)溶液中腐蚀的影响,结果表明Cl-对阳极钝化曲线所示的腐蚀电位、钝化区间、过钝化电位和析氧过程无明显影响,未见试样有孔蚀的迹象.但随着Cl-离子浓度增大,其维钝电流密度也增大.90℃时,不锈钢-碳钢在此溶液中构成电偶腐蚀时,测得碳钢腐蚀速率为0.064 mm/a,比未成偶对时碳钢的腐蚀速率大一倍.90℃时,将已钝化的不锈钢-碳钢在(K2CO3+KHCO3)溶液中构成电偶腐蚀时,测得碳钢腐蚀速率为4.0 mm/a,比含有V2O5溶液中碳钢的腐蚀速率大64倍.
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| 关 键 词： | 碳钢 不锈钢 电偶腐蚀 Cl- V2O5 K2CO3 KHCO3 |
| 文章编号： | 1002-6495(2003)06-0331-03 |
| 修稿时间： | 2002-09-27 |
EFFECT OF Cl- AND GALVANIC CORROSION ON PERFORMANCE OF CARBON STEEL IN HOT POTASSIUM CARBONATE SOLUTION |
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| CHEN Bu rong,MA Jun,BAO Chun sheng,ZHU Yi fan College of Materials Science and Engineering,Nanjing University of Technology,Nanjing ,China. EFFECT OF Cl- AND GALVANIC CORROSION ON PERFORMANCE OF CARBON STEEL IN HOT POTASSIUM CARBONATE SOLUTION[J]. Corrosion Science and Protection Technology, 2003, 15(6): 331-333 |
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| Authors: | CHEN Bu rong MA Jun BAO Chun sheng ZHU Yi fan College of Materials Science Engineering Nanjing University of Technology Nanjing China |
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| Affiliation: | CHEN Bu rong,MA Jun,BAO Chun sheng,ZHU Yi fan College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009,China |
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| Abstract: | Effects of Cl- on corrosion of carbon steel and stainless steel in K2CO3+KHCO3+V2O5 solution are studied.The results show that,from anodic passivation curve,Cl- has no obvious effect on corrosion potential,ranges of passivation,transpassive potential,and oxygen evolution. No pitting corrosion has been found in this experiment.However with the increase of Cl- concentration,the passivation current density increases,too.In comparison with the single carbon steel,the corrosion rate of carbon steel/stainless steel couple at 90℃ in this solution is 0.064mm/a,which is double as much as the former's.The corrosion rate of carbon steel of passivated carbon steel/stainless steel couple is 40mm/a in K2CO3+KHCO3 solution,which is 64 times as much as that in K2CO3+KHCO3 +V2O5 solution. |
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| Keywords: | carbon steel stainless steel galvanic corrosion Cl - V 2O 5 K 2CO 3 KHCO 3 |
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